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Adobe Photoshop 7 Tutorials
Color Modes / RGB Mode
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Subtitles of the Movie (Adobe Photoshop 7 / Color Modes / RGB Mode)
The RGB color mode is one of the most popular color modes, and one that you will probably be most often working in. This is the default color mode for most digital cameras and most scans, unless you have a scan made directly into CMYK. I recommend working in RGB most often, since it has the largest color range for these most popular color modes. The LAB color mode has the largest color gamut - however most files will be RGB in nature. If we are looking at the channels palette, you can see that when I select RGB, that all of my channels are selected. But one interesting thing we can do is select individual channels by clicking right on the channel name. And now we are looking at the red component, the green component, and the blue component. Notice a channel is selected when its name highlighted, and we are also viewing that channel if the eyeball is on next to it. So one thing that I can do in RGB, or for that matter any other color mode, is to select one channel, but turn the eyeball on icon for all the other channels. So now we are editing the blue channel, but seeing the composite channel effect. So with my blue channel selected, I might choose my mover tool, and move the blue component slightly out of sync, so you can see that it's no longer in perfect registration. I'll make that a little bit more graphic, maybe I'll just choose the red component by clicking on its name, and moving that out of registration. And of course if we want to edit all of our colored channels simultaneously, click right on the thumbnail or the name RGB, and then you can see that all of my channels will be selected. I prefer to look at my channels in gray scale information mode. So that when I click right on one of the channels, I'm seeing that channel's component as a gray scale channel. And I know that the red channel of course takes this gray scale information and pushes it through a red filter, and the same for the green pushing it through the green filter, and blue through a blue filter. However, I find it more helpful to see this in gray scale. One of our options is we can colorize our channel information. So go to your preferences, and on display and cursors, one of the options is to show color channels in color. So I'll enable that temporarily, and you can see now that what we have is the way that Photoshop actually operates - it takes that red data and pushes it through the red filter and the same for the green and the blue, giving us a full color image. It's important to understand that the RGB color mode has one of the largest color gamuts. And I recommend using this doing compositing, and if you need to convert to CMYK make that your last step in your imaging workflow.
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 |
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