Tuesday 24 June 2014

Managing Shadow Printing in Older CorelDRAW Releases



introOne of the niftiest effect tools in CorelDRAW’s toolbox has got to be the Interactive Drop Shadow Tool. It enables you to instantly apply soft, beautiful shadow effects. CorelDRAW’s drop shadow effects are bitmap-based. But if you’ve ever wondered about your shadow’s color model and resolution properties you’re not along. The answer is often critical to print workflows and largely depends on which version you are using.
Why won’t your shadows print in spot colors?
Prior to version X3, shadows were based on the CMYK (cyan, magenta, yellow, and black) color model used in full color printing. Although CorelDRAW’s interface appeared to provide ways for you to change the color model, CorelDRAW would alway revert back to this default at print time — without any warning. Thankfully, color management options in newer versions enable you to determine the color model that all effects are based on.
If you’re using CorelDRAW 12 or older and the shadows in the drawing you’re preparing need to be set to spot color inks, you have some work ahead. You’ll need to separate the shadows from the objects and then convert each shadow color model at the bitmap level.
NOTE: Keep in mind that this workaround will be successful only if there are no other colored objects underlying your shadow.
To convert the drop shadow to a fixed-palette ink color, follow these brief steps:
  1. If you haven’t already done so, finish applying your drop shadow effect using the Interactive Drop Shadow Tool and ensure the shadow is just the way you need it to appear before proceeding.
  2. With your drop shadow effect in place, right-click the shadow portion itself and choose the Break Drop Shadow Group Apart command from the popup menu. Doing this will break the dynamic link between your original object and the shadow effect.
  3. Using the Pick Tool, click to select only the shadow bitmap and choose Bitmaps, Mode, Duotone (8-bit). A message “Bitmap Has Color Mask” may appear warning you that are about to eliminate a transparency mask which may be applied to the shadow. If so, click OK to proceed.
  4. The Duotone dialog will open with the Curves tab in view, indicating the color type and any currently selected inks. If it isn’t already selected, choose Monotone in the Curves tab (shown next).
  5. To change from the current color, double-click the ink color name to open the Select Color dialog. In the Color Select dialog, choose the ink color you would like to use—such as a spot color of ink from one of CorelDRAW’s Fixed Palette collections. To access these colors, click the Fixed Palette tab in the dialog (as shown next). Click OK to close the dialog and accept your color ink choice.
  6. After choosing your ink color, you’ll be returned to the Duotone dialog. Notice your chosen color is now listed. Click OK to close this dialog and the new spot ink color is applied. Notice your Status Bar now indicates the selected bitmap is a Duotone (as shown next).
The solution to controlling your shadow’s bitmap resolution is even quicker than spot ink conversions. By default, all drop shadows are rendered using a resolution setting of 300 dpi (dots per inch), but if you require you may change this value anywhere within a range between 72 and 1,000 dpi using settings in the Options dialog by choosing the Workspace, General page. To access this option, open the Options dialog by choosing Tools, Options (Ctrl+J), click General under the Workspace heading on the left side of the dialog, and change the value in the Resolution area (shown next).



There’s something else to keep in mind when changing resolution settings for effects. Changing effects resolution only apply to shadow effects created after the fact, meaning the effects will only apply following changes to the drop shadow resolution. Any shadows already created will remain applied with the previous setting, as shown next) in this magnified view.
btn_donate_lg


New Rules for the Pick Tool

node-05If you’re a legacy CorelDRAW user peforming advanced design or illustration tasks or even basic vector drawing work, this may pique your interest. Since the release of version 12, there have been a couple of key changes to CorelDRAW’s Pick Tool default behavior. You can no longer manipulate object nodes using just the Pick Tool and you’ll need to pay closer attention when selecting unfilled objects.
In this tutorial, I’ll explain what’s changed and why. I’ll also show you how to restore the old behavior and throw in some customization techniques for added flexibility. For some users the choice will be obvious. For others, not so much.
Maximize Object-Snapping Actions
Let’s start with the Pick Tool’s node tracking behavior. With the release of version 12, the default Pick Tool settings were changed to allow smoother operation of the new dynamic guides and object snapping features. Dynamic guides largely eliminate the guesswork involved in precision drawing. As you move objects or draw new ones, dynamic guides appear on-screen temporarily between your cursor and the active-object snap points on nearby objects. Your cursor magnetically follows the path of any guide that appears. Distances, angles, and alignments with other snap points make precise cursor placement quite literally a snap.
You can customize guide behavior by using the Dynamic Guides pane of the Options dialog (see below), which you can access by choosing View > Dynamic Guides Setup. As you work, you can toggle the dynamic guides on and off with the Alt+Shift+D shortcut.
 
The new object-snapping options in CorelDRAW 12 work in tandem with the new dynamic guides and enable you to involve up to nine different snap points in the action. The Snap To Objects pane of the Options dialog (see below) enables you to choose exactly which snap points to use. You can access these settings by choosing View > Snap To Objects Setup. As you work, you can toggle the object snapping on and off by using the Alt+Z shortcut.
A Lesson in Nodes
Whether you’re a new CorelDRAW user or an expert, a little refresher on nodes, node tracking, and the tools involved will help you grasp the issue more completely.
Let’s start with nodes. Although different programs use different names for nodes (Adobe® Illustrator® refers to them as “anchor points”), the concept remains the same. Whenever you draw a shape or line, nodes are defined either automatically or manually. Typically, nodes are the small outlined points between the curved or straight segments of any open or closed path (see below). They control the size and shape of any vector object that you can create in CorelDRAW.
Shapes created with object-creation tools – such as the Ellipse, Rectangle, Polygon, and Perfect Shapes tools – also include specialized nodes that enable you to control unique object characteristics (see below). You can quickly reshape ellipses into pies or arcs, interactively round the corners of rectangles, distort polygon points, and customize the glyph nodes on certain shapes drawn with a Perfect Shapes Tool.
With Bézier lines (open or closed paths), nodes control the shape or direction, or both, of the path a line follows (see below).
What Is Node Tracking?
Next, let’s look at the Pick Tool and node tracking. The Pick Tool’s primary function is to enable you to select, move, transform, or rotate one or more objects. Although the function is now disabled by default, its node-tracking abilities enable it to mimic the Shape Tool in limited ways. When you enable node tracking, the Pick Tool cursor changes to the Shape Tool as you hold it over a node (see below). This cursor action (referred to as “tracking”) provides a convenient way for you to select and move any kind of node on an object without changing tools.
Of course, the Shape Tool’s unique primary function is to enable you to select and edit multiple nodes as well as the segments between the nodes (see below). Because node tracking is disabled by default in CorelDRAW 12, the Shape Tool replaces the Pick Tool for all editing of nodes and line segments.
The Conundrum for Users
You can easily reactivate node tracking, but there’s a downside to consider. While enabled, node tracking is sometimes more hindrance than help – particularly if you plan to take full advantage of the new dynamic guides and object snapping in CorelDRAW 12. Here’s what it boils down to. For many users, object nodes often serve as the grab point for moving and snapping one object to the nodes on another object. When object nodes are tracked by the Pick Tool cursor, you cannot move an object by using the nodes themselves. The tracking action essentially prevents you from selecting and moving the entire object (see below).
The upside to the equation is that you can control the Pick Tool’s node-tracking behavior in CorelDRAW by using the Options dialog. You can activate it if and when you need to. Now that you know the issues, though, you can make an informed decision on whether to enable the feature based on how you work.
Elegant Solutions
If you’re a devotee of node tracking, here are two solutions you can use.
Solution 1: If you really love the Pick Tool’s node-tracking capabilities and want to reactivate them by using the Options dialog, follow these steps:
  1. Choose Tools > Options (or use the Ctrl+J shortcut) to open the Options dialog.
  2. Click Display in the tree directory and click Enable Node Tracking to reactivate the option (see below).
  3. Click OK to apply the change and close the dialog.
    Keep in mind that you can always open the dialog again and disable node tracking if it is interfering with your object-snapping actions, or if you find that the display of the dynamic guides isn’t as smooth as it could be.
Solution 2: If you find yourself visiting the Options dialog more often than is practical, you can use a customization trick that makes it easier to enable node tracking. You can add the Enable Node Tracking option to the Pick Tool’s Property Bar – right where you need it to be – by doing the following:
  1. Start by selecting the Pick Tool from the Toolbox.
  2. Choose Tools > Customization to open the Options dialog to the Customization pane. Expand the directory tree under Customization in the list, and click Commands. The right side of the dialog shows a variety of options (see below).
  3. Choose Edit from the list box in the upper left of the Commands pane. Scroll roughly halfway down the list directly below the list box, and locate Tracking (see below).

  4. Drag the Tracking option button directly from the list onto the property bar. When you reach the Property Bar, an I-beam cursor appears, indicating the button’s new position. When you release the mouse button, the option button appears (see below).
  5. Click OK to apply the changes and close the dialog. The customization operation provides a quick way to toggle node tracking on or off as needed. After you’ve weighed the pros and cons of node tracking, you can choose the ideal way to accomplish your drawing tasks.
Would You Like to Treat Objects as Filled?
While we’re on the subject of Pick Tool behavior, I’ll mention one other recent change since version X4 was released that has some legacy users feeling frustrated.  To select a closed-path object that has no fill assigned has always required clicking precisely on its outline path. The disadvantage to this behavior meant that it was often confusing for new users trying to select unfilled objects — often a difficult challenge when working in a complex cluster of unfilled objects such as the blend effect shown next.
node-13
This default behavior in version X4 has been changed. Now you can select unfilled objects by clicking on their outline or their interior space regardless of whether or not the object has a fill applied. This behavior is controlled by the Treat All Objects as Filled option accessed by choosing Workspace > Toolbox > Pick Tool in the Options dialog (Ctrl+J) as shown next.
node-14
This new default behavior has frustrated many long-time CorelDRAW users who work in complex object layering situations. The problem arises when trying to select an object layered behind a larger unfilled object and makes the task impossible unless some type of advanced solution is used. 
In these instances you can use the Alt-click shortcut to drill down and select overlapping objects in a cluster, or you can use the Object Manager to locate and select the object from a long list of generically named objects. Of course, you first need to realize why you’re unable to simply click to select the object in the first place — hence the frustration.
If you’re a legacy user and liked the old way better, you have two options at your disposal. First, you could simply change the behavior back by editing your Pick Tool options. Or, you could add the Treat As Filled toggle button to the Pick Tool property bar through customization.
To customize your Pick Tool property bar options, follow these steps:
  1. With CorelDRAW running and a document open, select the Pick Tool as your current tool from the Toolbox.
  2. Choose Tools > Options to open the Options dialog and choose Workspace > Customization > Commands from the tree directory on the left.
  3. Choose Toolbars from the drop-down menu and navigate to the Treat As Filled item in the list (as shown next).node-15
  4. Drag this item directly from the list onto your Property Bar.
  5. Click OK to close the dialog and save the changes. The Treat As Filled button will now be available (shown next) to toggle the behavior on or off while either the Pick Tool or Shape Tool is selected and no objects are selected.
node-16
btn_donate_lgIf you found this tutorial useful, make a donation. Your show of support will help fund future tutorials and steer the direction of new site content.
Steve Bain is an award-winning illustrator and designer, and the author of nearly a dozen books, including CorelDRAW: The Official Guide.

Get the Most from CorelDRAW’s Enhanced Display

oprint-introIf you’ve used CorelDRAW in the past to create documents destined for a printing press, you likely already know how to apply overprint properties to objects. Overprinting is often used to reduce the likelihood of gaps between misaligned ink colors when printing with mutiple inks and occurs whenever two or more inks are printed onto the same surface area. Overprinting ink colors can create unintended colors depending on the opacity of the ink. In this tutorial, I’ll explain more on overprinting and explore a relatively new enhanced view mode that will help you see your overprinting results before the ink hits the paper.
In older versions of CorelDRAW, the results of applying overprinting properties to color objects usually involved a certain degree of guesswork. Thankfully, recent versions (X3 and higher) now include a view mode that enables you to see a live preview of applied overprints. With this new feature, you can check your overprinted colors and values on-screen before proofing or printing your work. 
Activating and Viewing Overprints
Typically, when you print from CorelDRAW, the nonvisible portions of objects layered behind other objects are removed – an occurrence called a knockout. This happens automatically and behind the scenes, in conformity with established digital printing standards. If you want, you can preserve the areas layered behind the fill, or outline portions of the foreground object, so that the colors are overlaid. In simplistic terms, this technique overlays one color onto another and is commonly referred to as overprinting.
In previous versions of CorelDRAW, you could apply overprints to your object fill or outline so that the colors overprinted any underlying colors, but doing so often required a little imagination (and memory work) to keep track of what you overprinted. Using the Enhanced View, you can now see how overprinted colors are affected on-screen. In the example shown below, two silhouetted images feature the same light-gray outline and a dark-gray fill on a multicolored background. The outline applied to the silhouette on the left, and the fill applied to the silhouette on the right, are set to overprint.
To activate overprinting, right-click any object shape, and choose Overprint Outline or Overprint Fill from the pop-up menu (shown below in the CorelDRAW X3 interface). A check mark next to the menu option indicates that the overprinting mode has been activated. (If either option is unavailable, check whether a fill color or outline width property has been applied to your selected object.)

If the object you select is a bitmap, the Overprint Bitmap option is available, as shown below. In this case, only the area occupied by the bitmap shape can be overprinted, so both the bitmap area and the shape of its clipping path are handled as a single unit.

After you apply your overprinting options, you can view the color results by using the Enhanced with Overprints previewing mode, which is a new feature in CorelDRAW. To choose this view mode (the application default), choose View > Enhanced with Overprints, as shown below. When the view mode is activated, any color shifts caused by the overprinted colors become visible. CorelDRAW uses your current color management settings to simulate the overprint colors.

While overprint options are applied to an object, the status bar displays an overprint indication symbol in the Fill Color and Outline Color indicators (see below) whenever you use the Pick or Shape tools to select the object.

Overprinting and Trapping
In certain printing operations, the overprinted inks can help reduce gaps caused by misaligned color plates where two or more colors meet. You can use the overprinted inks to manually apply a rudimentary color-trapping effect. For example, in the illustration below, an outline set to overprint is applied to a character shape to eliminate the likelihood of a visible gap.
 In traditional printing, trapping is a complex process in which the physical areas where color inks meet are expanded to overlap into adjacent areas of color. Traditional trapping is much more complex than simply applying an overprint effect—it essentially eliminates the printing inaccuracies due to misaligned inks.
trap is created when an expansion is added around a color area that is adjacent to another color area. Shapes of different colors are trapped in a direction from the lighter color to the darker color so that the two shapes slightly overlap.
The process involves two basic techniques to trap the ink areas: choking and spreading. A spread is created when a lighter-colored shape is positioned in front of a darker-colored shape. Portions are added to the edges of the lighter-colored shape in order to spread into the darker color, as shown below.

choke is created when a darker-colored shape is positioned in the foreground and a lighter-colored shape is in the background. The lighter background is choked where the two colors meet, meaning that the lighter background’s edges overlap into the darker shape’s edges (see below).

Part of this trapping process involves the overprinting of one ink by another. So, by manually applying trapping to the outline or to the fill property of an object, or to both, you can create a trapping effect of sorts.
Increasing Your Color Range
In general, overprinting creates a situation in which an ink color is printed over one or more other ink colors. If the inks are opaque, the overprinted ink colors are unaffected.
If the ink colors are translucent (as most are), new colors are created where the inks are overprinted, which can be an enormous benefit for designers or illustrators trying to maximize their color opportunities on a tight budget.
If you’re working within a limited printing budget, overprinting can expand your freedom in designing by offering new color opportunities. By overprinting translucent inks, you can create new color variations. You can take advantage of this relatively simple strategy by applying basic color-mixing skills. For example, mixing translucent blue and yellow ink colors produces green, blue mixed with red produces purple, yellow mixed with red produces orange, and so on (see below).

To gain even more mileage from your ink selection, you can increase the color variations by overprinting color tints or fountain fills of your ink colors, or both (see below).

Navigating Overprinting and Trapping Options
As mentioned earlier, the hidden portions of objects in your document are typically removed at print time. This printing method is the default condition, provided no other printing overrides or trapping options have been selected during printing.
Overprinting and trapping are somewhat intertwined, so you’ll see overprint options peppered throughout the printing and export options of CorelDRAW. For example, the EPS export, Publish to PDF, bitmap and duotone conversion, and separation printing features all include options specific to overprinting. Let’s examine how overprint options applied to objects in your drawing can affect your printed output.
The three basic levels of overprinting, listed in a hierarchy from highest to lowest, are separation overprints, trapping overprints, and document overprints. A higher-level setting generally overrides a lower-level setting.
Overprint options for specific document objects are referred to as document overprints and constitute the lowest level of overprinting. If you want, you can choose from a menu selection of Document Overprint options on the Separations page of the Print dialog box (see below) to preserve (the default) or ignore the overprint options you’ve applied. To correct the overprint colors by applying the current color profile of your separations printer when printing, you can choose the Simulate option.

At the next level, the trapping options become available, provided that you are printing to an Adobe® PostScript®-compatible printer and that the Print Separations option is selected on the Separations page of the Print dialog (see below). Trapping options enable you to use auto-spreading to apply automatic overprinting to text or objects, or both. Choosing Always overprint black causes all text and objects colored black to overprint all underlying object colors.

Choosing the Auto-spreading option activates further options for choosing specific spread values for text and objects. If your separations printer is equipped with its own trapping software, the In-RIP trapping option is available, enabling you to set specific trapping options for your printed output. Clicking the Settings button provides access to a dialog that features a complex set of overprinting and trapping-specific options (see below).

At the highest level, you can also choose to overprint separation ink colors by using the overprint options in the separation inks list (see below). For these options to become available, you need to use a PostScript printer and then choose the Print separations and Use advanced settings options on the Separations page of the Print dialog. You can activate overprinting at this level by clicking the Advanced button to open the Advanced Separations Settings dialog (see below), or by clicking directly in the ink list on the Separations page of the Print dialog.

Click directly on the symbols adjacent to the ink color in the list to cause the ink color to overprint all underlying colors for text (A icon) or graphics (the shapes icon), or both. Each option toggles on or off when clicked.
This exploration of overprinting has shown you how to apply overprints while CorelDRAW enables you to view your applied overprints on-screen without having to rely entirely on your imagination to evaluate the results. Keep in mind that the interrelated subject of trapping is more complex than what I’ve covered here. For details on this complex subject, your best bet is to investigate the improved reference documentation in the Help in CorelDRAW  (seeWorking with Color Trapping and Overprinting). The Help documentation also provides detailed information about the trapping options available.
btn_donate_lg

Assembling Panoramas in PHOTO-PAINT

pan-intro2Have you ever tried to photograph a scene that’s just too large to fit in your camera’s viewfinder no matter how many steps backward you take? Unless the wide-angle lens you’re using can work miracles, this is a common challenge that many photographers face. Why not just shoot a photo panorama?
Photo panoramas incorporate multiple overlapping photos of a scene or subject into a single composite photo. Historically, building a photo panoramic using traditional non-digital tools required scissors, rubber cement, a mounting surface, and an incredible amount of patience. In the digital realm though, the task can be much faster and easier and the results much more rewarding if you have the right software tools. If you’re interested, Wikipedia showcases a collection of stunning photo panoramas that are definitely worth browsing.
Building a Basic Photo Panorama
Photo-stitching resources in recent versions of PHOTO-PAINT (X3 and X4) enable you to quickly and accurately assemble multiple overlapping images into a single image. The resizable Image Stitch dialog includes everything you need to organize multiple panoramic sections and align the overlapping portions. The available work area gives you an interactive view of the arrangement and provides access to a variety of useful tools.
You’ll find a typical Selection and Rotate tools for moving and arranging photos and Zooming and Panning tools enable you to easily navigate the work area. ADifference Tool button enables you to toggle how your currently selected image is rendered by inverting the transparency type. Other options enable you to set blending and composite methods. These tools are straightforward to use and assembling a typical multi-image scene is a relatively quick operation. For some hands-on practice, let me walk you through this basic photo-stitching tutorial:
  1. Download and unzip the Canyon_Vista.zip digital image set (2.5 Mb). Launch PHOTO-PAINT and open all four images at once. These images are sequentially named left to right according to their position in the panorama.
  2. Choose Image > Stitch and click the Add All button in the Select Images dialog that opens. With the four images listed on the Selected Files side of the dialog (as shown below), ensure the image names are in sequential order in the list using the up and down arrow buttons to the right and click the OK button.x3pan-01
  3. The Image Stitch dialog opens next with the images automatically placed in order left to right according to the stacking order in the previous dialog. If needed, resize the dialog using the bottom-right corner tab (as shown below).x3pan-02
  4. Choose the Zoom In Tool and click once at the seam between the top-left and top-center images. Then, choose the Selection Tool and click-drag the top-center image to select it. Notice the image becomes slightly transparent once it is selected.
  5. Move the top-center image to the left until the two images overlap and align (as shown below). You can also use your keyboard nudge keys to move the image in small increments if needed.x3pan-03
  6. The Difference Tool makes it easier to precisely align overlapping images. To explore how it works, click the Difference Tool button once to activate it. Notice the colors of your selected image become inverted and overlapping areas appear darker. This overlap will appear completely black when the images are aligned (as shown below). Click the Difference Tool button again to deactivate it.x3pan-04
  7. Using the available tools, drag the remaining two images into position. Drag the bottom image to the far right of the arrangement and use theSelectionZoom, and/or Difference tools as needed to precisely align all four images.
  8. Leave all other options at their default settings and click the OK button. The Image Stitch dialog will close and a new document window will open with the four images combined in a panorama (as shown below) ready for saving.x3pan-05
Using Advanced Techniques
In the previous steps, we used an example that you were able to align precisely and the seams in the final result were virtually impossible to detect. Hiding the seams is the key to building a realistic-looking panorama. There are a multitude of factors I’ll cover later that can (and will) affect seam visibility. One key factor is camera or subject movement which throws overlapping areas out of alignment.
You can solve alignment problems using the Blend Image option. This feature is designed to hide non-aligned areas using transparency. In our next example, we’ll assemble a panorama adversely affected by wind and apply different Blend Image values to evaluate the results.
  1. Download, unzip, and open the Mountain_View.zip digital image set (3.2 Mb) in PHOTO-PAINT (X3 or X4). The images are sequentially named left to right to match their position in the panorama.
  2. Choose Image > Stitch to open the Select Images dialog, add the images to match the sequence shown below, and click the OK button.x3pan-06
  3. In the Image Stitch dialog, overlap and align the images in left-to-right fashion to as you did earlier in our first example. If needed, activate theDifference Tool to make alignment easier. Notice the foliage in the image is slightly out of alignment-especially on the far-right sections. In this case, align the photo elements closest to the left edge of the fifth section as closely as possible (as shown below).x3pan-07
  4. Leave the Blend Image value set to the default of 5 and click the OKbutton. The dialog closes and a new document window of the combined images is created. Notice the edges of each photo section remain visible (as shown below).x3pan-08
  5. Reassemble the same images a second time using the Image Stitch dialog and be sure to align the overlapping images in the same way you did the first time. However, this time set the Blend Image value to 100 and click the OK button to close the dialog. Another new document is created with the assembled images, but in this instance the seams are virtually invisible (as shown below).x3pan-09
The Blend Image unit measure is pixel-based and combines the overlapping photo sections using transparency. The value you use should not exceed the distance of the smallest overlap or some of the seams may be visible in the final assembled image. It may also help to know that if you choose Create Objects From Images, no blend value will be applied to the photo objects that will result from using this option.
Another alignment technique you may need to use is rotation. You can rotate a selected image interactively using the Rotate Tool or in precise increments using the spinner controls or by entering values. For hands-on practice applying rotation to an image, follow these steps:
  1. Download, unzip, and open Fruit_Bowl.zip digital image set (8.6 Mb) in PHOTO-PAINT. Choose Image > Stitch to open the Select Images dialog and add both images in the order shown below (with the Fruit bowl rightimage at the top of the Selected Files list).x3pan-10
  2. Click the OK button. Adding the images in reverse order will enable you to control the stacking order of the images so that the left image is stacked on top of the right image in the final assembly. Notice that in the Image Stitch dialog (shown below) the images are also loaded out of order.x3pan-11
  3. In the Image Stitch work area, transpose the position of the images using the Selection Tool as shown below. Drag the two images to align them as closely as you can and notice that no matter what you do, the images will not precisely align. In this case, the solution is to rotate one of the images slightly.x3pan-12
  4. Click to select the image of the left half of the bowl and enter a rotation value of 358.5 degrees in the Rotate Image box (as shown below).x3pan-13
  5. Use the Selection Tool to drag the image of the right side of the bowl so that the two overlapping images of the pear stem are nearly aligned (as shown below). To fine-tune the alignment, use your nudge keys and use the edges of the bowl for visual reference.x3pan-14
  6. With the two images aligned in the work area, enter 100 in the Blend Imageoption and click the OK button to assemble the two images in a new document window (shown below). Notice the seam is hidden and the two images are precisely aligned.x3pan-15
  7. If you closely examine the rotated half of the assembled image, you’ll notice there are slight serrations caused by the rotation we applied. If needed, you can apply single-clicks using the Touch-Up Brush set to a Sizeof 10 pixels and a Strength setting of High to reduce this anomaly (see below).x3pan-16
Panorama Best Practices
Producing a successful panorama scene is not only the result of having the right tool to reassemble the parts, it involves a little advance planning and carefully deciding whether your actual photo situation is a good candidate. Consider these suggestions to increase your chances of success:
  • Avoid Movement Any movement between photo sections will make image alignment difficult (if not impossible). Ocean waves, blowing trees, clouds, and moving objects such as vehicles and people are some obvious examples. Likewise, camera movement can also be a factor. If possible, use a tripod or similar stabilizing method.
  • Use Consistent Exposure Be certain your panorama photo sections are taken using the same exposure. Most non-digital cameras offer exposure lock settings you can use, while many digital cameras include panorama-specific modes which will (among other things) lock the exposure setting.
  • Avoid Distortions Wide-angle or macro lens settings can cause inconsistent distortions between photos, so avoid using these if possible. Using zoom lens settings have the opposite effect and tend to reduce distortion.
  • Scan Carefully When digitizing photographic prints with a scanner, be sure to disable any built-in or automated scanner color-correction features since these features often apply different correction scans. Be sure to crop out any borders or white edges during or after scanning.
  • Correct After Assembling If you plan to correct your panorama for color, lighting, or other anomalies, do this after using assembling the sections. This will save you time and avoid any filter inconsistencies.
  • Higher Resolution is Better Scan your photos at as high a resolution as possible to maximize the blending opportunities and/or minimize rotation effects.
If you found this tutorial useful, make a donation. Your show of support will help fund future tutorials and steer the direction of new site content.

ing Depth-of-Field Effects in Corel PHOTO-PAINT

depth-introBlurry or out-of-focus pictures aren’t usually very appealing in a layout. But strategically applying blur effects to an image can sometimes work to your advantage. Blurring specific areas of a picture enables you to clean up messy background clutter and focus in on the subject at hand. This technique is also great for exaggerating depth-of-field created naturally when using a wide camera lens aperture.
In Corel PHOTO-PAINT, you can use a variety of filters to blur pixels in different ways. Radial, directional, motion, and gaussian blur filters each offer variations on the smoothing effect you can achieve. Depending on your picture subject, some filters work better than others, but the idea is the same.
Let’s explore a brief series of steps you can use to simplify the clutter in a typical scene.
  1. Open this image file saved Corel PHOTO-PAINT X3/X4 format or open your own image to work on suitable for this technique. Perform any necessary image corrections or adjustments before you begin and decide in advance which areas you wish to blur and which areas will remain in sharp focus. For my example image (shown below), I’ve chosen to blur the background and leave the main subject in sharp focus.depth-01
  2. Using whichever masking tools suit the task, isolate the area, or areas, where you wish to apply your blur effect. To save a little time, I’ve already isolated a portion of my example image. To load this saved mask now, choose Mask > Load > Cow Face (see below).depth-02
  3. To ensure you can see the mask onscreen while editing (see below), toggle the mask overlay on by choosing Mask > Mask Overlay.depth-03
     
  4. The next step is to slightly feather the edges of the selected area to avoid leaving hard edges between the area you with to leave in focus and the blurred area. To feather the edges of your selection, open the Feather dialog (see below) by choosing Mask > Mask Outline > Feather. In the Width box, enter 2 as the pixel value, choose Inside as the direction, Linear for the Edge shape, and click OK to close the dialog. Your selection mask is now slightly feathered.depth-04
     
  5. With mask feathered, you can apply the blur effect. Im my case, I’ve chosen a straightforward gaussian blur style. Feel free to experiment with others if you wish, but for now choose Effect > Blur > Gaussian Blur to open the filter dialog (see below). Enter 10.0 as the Radius in pixels and click OK to apply the effect and close the dialog.depth-051
  6. Remove the mask overlay and view the results by choose Mask > Remove (Ctrl+R). Notice that some hard edges still remain between the sharp and blurred areas in the example we’re using. If you’re using your own image, you’ll likely need to do some work to smooth the transition area between the sharp and blurred areas. The quickest tool to use for this operation is the Touch-Up Brush (7). You’ll find it in the Toolbox grouped with other Touch Up tools in recent versions of PHOTO-PAINT (see below).depth-06
  7. Using the Property Bar, set the Touch-Up Brush options to round-feathered nib shape, 20 pixels in width, and a Strength setting of High (as shown below).depth-07
  8. Using a click-drag action, follow the contour of the cow face area with the Touch-Up Brush cursor. This will eliminate most of the hard edges left by blurring the mask. The final image (see below) focuses attention on the central picture element leaving the background objects much less prominent. depth-08
As you work with your own picture elements, keep in mind that you can blur multiple areas of a photo by using varying degrees of blur. Both foreground and background elements can be blurred to isolate specific elements. The farther away from the plane of focus a picture element is, the more blurring you should apply.
btn_donate_lg

Custom Sprayers Can Add Real Drawing Power


By Steve Bain
There’s nothing better than harnessing the power of your computer to create hundreds or even thousands of objects in the blink of an eye. sprayer-introCorelDRAW’s Artistic Media Tool sprayer enables you to do just that. You can ‘spray’ objects onto any open or closed path and for amazing technical and creative effects. In this short tutorial, I’ll show you how to create your own sprayer effect and set options to control its appearance.
You’ll find the Artistic Media Tool located in the Toolbox grouped with other line-drawing tools in any recent version of CorelDRAW (as shown below).
sprayer-01
Drawing while Sprayer is selected as your Artistic Media Tool mode (shown below) enables you to apply saved spray styles to lines. Each stroke you make can be instantly applied with a saved object distorted to the shape of your path. Once applied, the spray style extends the full length of each stroke.
sprayer-02
By creating custom Sprayers, you can quickly draw highly complex collections of objects and dynamically control their appearance while still having the ability to edit the condition of the path. As an example, I’ll show you how to apply a set of footprints that follow a path at a specified spacing and rotation (as shown below). Since the Artistic Media Tool can be controlled using either Property Bar options and/or using the Artistic Media docker, I’ll mention both as I walk through the steps.
sprayer-03
Start by downloading this zipped CorelDRAW file (saved in CorelDRAW version 12 format) or follow these steps using your own creation. Although I’m using CorelDRAW X4 for demonstration purposes, the same technique can be used with versions as far back as version 10.
To create a custom sprayer, follow these quick steps:
  1. If you are starting from scratch, create the object you wish to use as your new sprayer style and create the path you wish the sprayer to follow. To follow the download example, uncompress and open the CorelDRAW file named Footprint Sprayer.cdr (shown below). The file consists of a single page that includes just two objects.
    sprayer-04
  2. For this example, the footprint group I’ve created consists of a pair of fading footprint objects roughly 0.5 inches wide by 1.5 inches high and a curving path across my page. Open the Artistic Media docker (shown below) by choosing Window > Dockers > Artistic Media and scroll to the bottom of the stroke list.
    sprayer-05
  3. Choose the Artistic Media Tool (I) and choose Sprayer mode in the Property Bar. Click to select the footprints (or your own objects) in the upper-right corner of the page. In the Artistic Media docker window or the Property Bar, click the Save button. The Create a New Stroke dialog opens (shown below). Choose the Object Sprayer option and click OK.sprayer-06
  4. In the Save As dialog that opens next, enter a name and click OK to save your new sprayer. Your sprayer is automatically added as the last item in Spraylist File List in both the Property Bar and the lower half of the docker.
  5. To set default options for your new custom sprayer, click to select it from the spray list either in the Property Bar or the docker. Be certain no objects are currently selected on your page. Use Property Bar options to control your Choice of Spray Order, Dabs and Spacing, Rotation, and Offset options. If you’re using the footprint sprayer example, choose By Direction, a Dab value of 1, Spaced at 2.0 inches, with the Rotation set to 90 degrees and Relative to Path (as shown below). If you’re using your own creation, experiment with the settings through trial-and-error as needed.
    sprayer-07
  6. With your options set, create and/or select the path or object for your custom sprayer. Using the docker, select and drag your new sprayer from the docker window directly onto the path or object (as shown below).
    sprayer-08
  7. The effect is immediately applied (see below). Notice the actual path or object applied with your sprayer becomes hidden and only the sprayer objects appear. Incidentally, since this is a dynamically linked effect, you can manipulate the curvature of the path at the node level using the Shape Tool (F10) while the sprayer is applied without altering the options applied to the sprayer.
sprayer-09
While the sprayer is applied to the path, experiment with the effects of other options using the Property Bar. As you do, you’ll discover just how powerful the sprayer effects are. Click the Reset Values button (far right on the Property Bar) will return the sprayer options to the default values you first applied. If you wish, you can also dismantle the effect and return the path to its original state by right-clicking the path and choosing Break Artistic Media Group Apart (Ctrl+K).
btn_donate_lg
A



No comments:

Post a Comment