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As an image editing application Photoshop is known for it's filter. A filter is a device by which you can change the composition of the pixels in your image. For example we have filters that will allow you to blur parts of your image. They will change the arrangement of the pixels as far as smudging and smearing and twirling them around. You can add noise to your image, you can remove noise and dust and scratches from your image and you can do all kinds of things like make your artwork look like a painting. Now we are gonna talk more in depth about the filter gallery in a little while. But what I want to definitely bring to your attention is that when you use filters you can also selectively decide where to place those filters. For example in this image I have nothing selected which means everything is selected. So if I go to filter and I choose something like blur and I choose a motion blur you'll notice it encompasses the entire image because I have nothing selected or nothing protected so I'm going to cancel that and I'm going to show you something. I'm gonna grab my rectangular marquee tool and I'm gonna draw out a selection around the tree like this, I'm gonna bring it always to the bottom. Now I'm gonna go to filter and I'm gonna choose that same exact motion blur and you see what happens it only effects the area that is inside the selection because we're telling the computer to apply this to a specific region. The cool thing about a filter is I can quickly reapply it by simply moving my selection or keeping it where it is by the way, doesn't really matter but for now, move it over here and I want to show you something here, you can see the last filter you used at the top of the menu and you also see a shortcut, command or control S. So I'm gonna go ahead and get, get rid of this for now and show you that I can press command or control F to reapply that filter and I can keep this thing going over and over and over again to reemphasize how powerful that's gonna be on the selected area. So I'm gonna once again deselect that and I'm going to revert and I'm going to show you one more time how you can really max that filter out. So this time I'm gonna go this direction and I'm gonna go to filter, blur, motion blur. Now you notice that I want to change directions, that are the reason you want to go back to the original filter, you don't want to go back up here. It's going to apply the parameters you input already. So if you want to do something completely different even though you are using the same filter, you still have to go back to it to reinitialize it. So I'm gonna go back to motion blur and now I have to change the angle myself and I'm gonna click OK and this time I'm gonna hit command or control F a couple times and really blur that out. And this could really show you what a hurricane is doing to a part of your image. So once again filters are simply a way to change the composition of your image by moving the pixels around, changing the color of them, adding all kinds of painterly special effects and more.
| Course: | Adobe Photoshop CS3 |
| Author: | Dwayne Ferguson |
| SKU: | 33782 |
| ISBN: | 1-933736-98-4 |
| Release Date: | 2007-08-02 |
| Duration: | 9 hrs / 161 lessons |
| Work Files: |
Yes |
| Captions: | No |
| Compatibility: |
Vista/XP/2000, OS X, Linux QuickTime 7, Flash 8 |