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Let's put the Unsharp Mask to work on a real image. Since this image doesn't have any other Smart Filters applied to it on the Background Layer I'll use it and create a Smart Filter. Then I'll resize the image to my desired output dimensions. The precise amount of sharpening always depends on the file size and by creating a Smart Object first and then resizing I can repeatedly resize the file without losing image quality, but if I repeatedly change the image size on a regular layer I'll quickly lose quality. Let me demonstrate what I mean. I'm going to make a duplicate version of this image and I'm going to rasterize that layer so that it's a regular layer. And now I'm going to go Image, Image Size, and I'm going to decrease the file size as though I were outputting it to the web. And now I'm going to change the image size again and increase it to about ten and two-thirds inches as though I were making a print of it. And now I'm going to make it smaller again as if I were sending it in an E-mail. And now I'm going to make it larger once more as though I want to make a small print of it. Let's look at that image. Can you see how blurry it is and what a mess? I'm going to go over to the same image that I have as a Smart Object and I'm going to do the exact same resizing. I began by changing it into a 500 pixel image, and then I made it ten and two-thirds inches, and then I made it small as if I were going to send it in an E-mail, and then I made it as if I were going to make a small print of it. Take a look. We still have all the original quality. That's because each time I resized it, it went back to the original image. There's that version of it, there's the other. Huge difference. That's why it's essential, if you're going to do your sharpening on your Master file that you must create a Smart Object Layer to use the Sharpening as a Smart Filter. If other filters had been applied I'd have to create a Merge Visible Layer at the top of the Layers Panel as I described in the movie on Multiple Smart Filters, or follow the procedure I described for duplicating the Smart Filter Layer and creating a new Smart Object, Smart Filter Layer and then resize the image.
| 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 |