Jan. 24, 2011, 8:57 a.m.
posted by spider
Size may not be everything, but it’s certainly one of the things people are often concerned about — or ought to be. You don’t need a 1024 x 768-pixel image, for instance (which is full-screen size on many PCs), for a snapshot of your new company CEO on your Web site. If you didn’t get an appropriately sized CEO (okay, an image of a CEO) in the first place, you can trim that person down in Paint Shop Pro. Likewise, if you’re rushing to prepare the opening screen for a company presentation and the only way you can get a logo is to scan in the tiny one on your letterhead, Paint Shop Pro can help you size it up to a more presentable image.
If you’re preparing an image that someone else plans to place in a professionally prepared and printed document, don’t scale it down yourself. Let your graphics designer or printer do the scaling to suit the printing process.
Start resizing by choosing Image→Resize. The Resize dialog box appears in order to help you size the situation up — or down (see Figure).
The Resize dialog box normally keeps the image’s proportions (relationship of width to height) constant while you resize. If you set width, therefore, Paint Shop Pro sets height for you (and vice versa). Keeping image proportions constant avoids distortion.
If you prefer to change the proportions (which distorts your image), you can click to clear (deselect) the check box labeled Lock Aspect Ratio __ To 1, as shown in Figure, and Paint Shop Pro lets you set width and height independently.
Using the Resize dialog box, as shown in Figure, you can adjust the size in one of three ways, all of which do the same thing: change the image’s size in pixels. Use whichever way suits your mindset:
Specify size in pixels: If you’re using the image on the Web or in e-mail, you probably have a pixel size (probably a desired width) in mind. Select Pixels from the drop-down menu next to the Width and Height controls and then enter a value for Width (or Height).
Make it X% of its current size: Select Percent from the drop-down menu next to the Width and Height controls and then enter a value for Width (or Height). In Figure, for instance, the setting of 66 makes the image 2/3 (66 percent) of its current size. To double the image size, use 200.
Make it print bigger or smaller: Select which measurement you want to use (inches or centimeters) from the menu on the right side and then use the Width or Height controls in the Print Size section to make the image print as large as you want. Paint Shop Pro multiplies this physical size (in inches, for example) by the resolution setting (pixels per inch) in this dialog box and calculates a new image size in pixels. You can also change the value in the Resolution text box to adjust the image resolution (pixels per inch or centimeter). Don’t confuse this setting with the printer’s resolution (typically 300 to 600 dpi); see Chapter 16 if you are confused about printing and resolution!
If your image has several layers and you want them all resized the same, make sure to check the Resize All Layers check box. If you clear that check mark, you resize only the active layer. Click OK to make the resizing happen.
Resizing sounds easy: Just make the image bigger or smaller. What’s to think about? Well, usually, you don’t have to think about anything. Occasionally, however, your image’s appearance degrades after resizing. It has jagged or fuzzy edges. These situations call for a little thought.
Behind the resizing issue is another difference between how computers and humans think. If you want your image to be 25 percent bigger, Paint Shop Pro has to figure out how to spread 100 pixels over 125 pixels. To get an idea of the problem, imagine dividing 100 cookies among 125 kids who don’t accept broken cookies. Fortunately, Paint Shop Pro is pretty smart, so you don’t have to smoosh up and bake these cookies again yourself. Unless you instruct Paint Shop Pro otherwise, it uses the Smart Size feature to make these decisions — it chooses the right way to do it based on what your image looks like.
If your image doesn’t look so hot after resizing, try second-guessing the smart resizing that Paint Shop Pro uses by default. Press Ctrl+Z to undo the ugly resizing you just did. Then choose Image→Resize again. In the Image Resize dialog box that appears, click the Resize Type selection box to see the specific choices of ways to resize. Here’s what to do with those choices:
Bicubic Resample: Choose to enlarge a realistic-looking or complex image (like a photo) or to avoid jagged edges.
Bilinear Resample: Choose to reduce a drawn image, one with well-defined edges, or one with text.
Pixel Resize: Choose to enlarge a drawn image or one with well-defined edges. (Paint Shop Pro then simply removes or duplicates pixels in order to resize.)
Weighted Average: Choose to reduce a drawn image, one with well-defined edges, or one with text if the Bilinear Resample option doesn’t work out.
Click OK to proceed with the resizing. If your image doesn’t look better, press Ctrl+Z to undo the last resize. Choose a different resizing method and try resizing again.
Bilinear and bicubic resampling work for only 24-bit color images (or grayscale images). You can use them on fewer-color images by increasing the color depth to 24-bit, resizing the image, and then reducing the number of colors to the original. Refer to Chapter 9 for help with changing the number of colors.