Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member
In these next few movies, we'll be seeing the same image in different color modes. Here, we have the RGB version. I am just going to talk about the characteristics of this image as an RGB image. RGB is the color space in which all our images begin. It's the color space of our monitors; it's the color space of our digital cameras and of our scanners. It's also the color space of the web. If you're creating an image for the web, it's going to be an RGB image. If you're creating an image for print, it is at some point going to need to end up as a CMYK image.
At what point is open to debate, and I will talk about that when we look at the CMYK version. But, for now, the RGB version, it has three color channels; Red, Green, Blue and we have the Composite which shows all three superimposed on each other. Each of these three color channels is made up of brightness levels on a scale of 0 to 255, with 0 being black, 255 being white. If I come and choose my Color Sampler tool which lives beneath my Eyedropper tool, and then take a sample of a very dark area, we can see that on the Info panel, I have low value numbers.
If I now take a sample of a very bright area, we can see that I have very high value numbers. So the more light we add, the higher the number, the brighter things get. In practical terms, in terms of editing an RGB image, using a curves adjustment, this means that if we move the curve up, we are adding more lights, and things are getting brighter, we move the curve down, we're removing light, things are getting darker.
The opposite is true as we'll see when we work with a CMYK image in the next movie.
Get unlimited access to all courses for just $25/month.Become a member
117 Video lessons · 42607 Viewers
119 Video lessons · 53983 Viewers
65 Video lessons · 14289 Viewers
113 Video lessons · 82814 Viewers
Access exercise files from a button right under the course name.
Search within course videos and transcripts, and jump right to the results.
Remove icons showing you already watched videos if you want to start over.
Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.
Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.
Your file was successfully uploaded.