The parameters we will use first is the single numbers such as .20 - 9. These numbers will either lighten or darken the image depending on the number.
As you can see above the smaller the number the darker it became while using higher numbers the image became lighter. You can also use %s with the same numbers. Now on to Color Filtering. RGB is for RED, GREEN and BLUE. We will be adjusting the image to show more of one than the other two. The RGB parameters are typed in this way- .50/.50/.50 the first number is for Red, the Second for Green and the last for Blue. As you can see from the numbers and the example which color is dominate. Try experimenting with the numbers bringing them closer and farther apart with different images to see what effect it has on it. Susanna
Gamma filters the Colors in an Image. It can also bring more light to an image or make it darker. Original 
.20 
.50 
.80 
2 
5 
THE RBG
RED, GREEN, BLUEOriginal .50/.50/.50 
1.50/.50/.50 
.50/1.50/.50 
.50/.50/1.50 
We are now going to switch images to get a better idea of what Gamma can do with the RGB's. We are going to adust the colors to give the image a different tone. Original 
1.6/1.2/1.4 
1.6/2.2/1.9 
1.0/1.2/2.9 
2.9/1.2/.99 