Adobe Photoshop 7 Tutorials
Color Adjustments / Other Adjustments
Visitors to VTC.com will be able to view all introductory videos for each training course.
Free Trial Members will gain access to first three chapters for each training course.
Full Access Members have full access to VTC.com�s entire library of video tutorials.
Learn More
Subtitles of the Movie (Adobe Photoshop 7 / Color Adjustments / Other Adjustments)
There are a handful of other types of adjustments that you can use, and some of them really fall under the rubric of special effects. Image menu>adjustments - one of the more interesting ones you can choose is called gradient map. And what this will do is it will map the brightness values of your pixels to those associated in a particular gradient. It brings up our gradient map dialogue box. And what this is right here is a large preview of the currently selected gradient, click on the preview and it brings up the gradient editor. And we could go ahead and edit that particular gradient, I'll hit cancel, or you can also click on this popup menu to see this palette of gradient presets. So, I'm just going to choose one. And now you can see how the brightness values of my image are being mapped to the gradient image. And choose to dither the effect, which can make it a little bit pleasing to look at, and also we can reverse the way the brightness values are being mapped. I'll go ahead and undo that, and talk about some other options that we have. The invert option will simply invert the brightness values of your image. Making it look like a negative. I use this a lot when I'm working with masks. Command + I will invert the brightness values of your selected layer or channel. Other option is equalize, and what equalize will do is it will redistribute the brightness values of your pixels to more evenly represent the entire image. So if you have a very dark image, it will lighten it up, and if you have a very light image it will darken it up a bit. If you want to create a very graphic effect, you might choose threshold. Threshold will convert your image into black or white pixels, and what it does is it gives you a slider, allowing you to position where the threshold of this change is. So you can see that it defaults to being right in the middle of the brightness values. You could of course drag this down, and then have more of the pixels fall into the white or go above 128, and have more of them fall into the black. So this way you might use this as a step to create a very graphic kind of effect. I'll go ahead and undo threshold. And talk about the last one: posterize. What posterize does is it limits any channel to a collection of discrete levels. So in this case, posterize set to 4 means that there would be 12 different colors in this image. Because there would be 4 levels of brightness times 3 channels. And we could dial this, just type in an even lower number. And you can see now that we would have about 9 different colors. So it too will also create a very graphic effect. This time in color.
Tutorial Information
| Course: | Adobe Photoshop 7 |
| Author: | Andrew J. Hathaway |
| SKU: | 33329 |
| ISBN: | 1889347272 |
| Release Date: | 2002-09-05 |
| Duration: | 11 hrs / 152 lessons |
| Work Files: |
Yes |
| Captions: | No |
| Compatibility: |
Vista/XP/2000, OS X, Linux QuickTime 7, Flash 8 |
VTC Sign up & Benefits
- Unlimited Access
- 81,350 Video Tutorials (14,200 free)
- Video Available as Flash or QuickTime
- Over 715 Courses
- $30 for One Month Access
- Multi-User Discounts Available
