Adobe Photoshop CS4 for Photographers Tutorials
Output / Resizing
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Subtitles of the Movie (Adobe Photoshop CS4 for Photographers / Output / Resizing)
Most of the time you'll be working on your images at their native resolution, meaning that when you output them from camera raw, you neither interpolated up or down to increase or decrease the size of the file. You may have cropped it either in camera raw or in Photoshop. But unless you added resolution numbers to the Photoshop crop the image is still uninterpolated, meaning that no pixels have been added or removed except of course the ones that have been cropped away. But the chances are that when you output your image, whether its as a print or for the web or a slideshow or whatever your going to need the file to be a different size. There's several ways to resize images. In outputting to print you'll want to begin by going Image, Image Size and specify the dimensions that you need here. To begin make sure these three boxes Scale Styles, Constrain Proportions and Resample Image are all checked. If you don't have Constrained Proportions checked then the image may become distorted and change Aspect Ratios, Resampling enables Photoshop to interpolate the image adding or taking away pixels as necessary. If you're making the image larger then you're going to choose bi-cubic smoother. If you're making it smaller you could opt for bi-cubic sharper but I recommend bi-cubic. The reason is that bi-cubic sharper in addition to making image smaller sharpens it. I prefer to have more control over the sharpening process in general. If bi-cubic sharper over sharpens your image you can't reduce the sharpening when it's applied that way. You can either specify your document size or the pixel size for the file. It's easiest to specify document size when you're outputting to print. For example if I wanted a print that is 15 inches wide, all I have to do is type 15 in here, Photoshop automatically calculates the height of the image and I'm good to go. I choose to print at 300 pixels per inch resolution because I find that, that's the best compromise on giving me the high quality that I want and a reasonable file size. Some printers print at 360 and actually upsize the image a little bit, I don't see much difference in using 360 or 300. You'll find there's some people who use 240 and some people who use 180. At 180 you can start to see some loss of File Quality, so I personally don't like to go down that low. If you're outputting for a slideshow, instead of setting document size you may prefer to just enter the pixel size. For example if you have a standard projector that's 1024 by 768 you would type in 1024 for your pixels, the height would automatically be calculated. When you specify the pixel dimensions you don't really need to worry about the resolution. In the old days for some programs it helped if you specified the resolution, for example 96. You have to be careful when you set it because it can change the pixels as it just did. When you have everything set click OK and your file will be resized.
Tutorial Information
| Course: | Adobe Photoshop CS4 for Photographers |
| Author: | Ellen Anon |
| SKU: | 34036 |
| ISBN: | 1-935320-74-2 |
| Release Date: | 2009-09-23 |
| Duration: | 8.5 hrs / 112 lessons |
| Work Files: |
Yes |
| Captions: | No |
| Compatibility: |
Vista/XP/2000, OS X, Linux QuickTime 7, Flash 8 |
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