![]() ![]() All RGB values on the third line are changed by equal percentages. It should soon become fairly obvious that the result of the RGB curve adjustment on the top line most often runs astray from the original color while the adjustment on the third line does not. Feel free to explore this further by clicking on any color patch to return to the color grid and to choose another color you'd like to experiment on. Comparing this first color pair to the one on the bottom row will make the difference obvious though. Its difference in brightness relative to the original color patch on its left can make it tricky to discern at a glance that this is no longer the same color. The second color patch on the top row below the curve is the result of the adjustment. ![]() You can see that quite different percentages come into play when simply applying a curve to the RGB values of our example color patch. Changing individual color components by differing percentages due to a curve always changes the color in a way that does not match natural changes in lighting and effectively results in another color. These different values reside on different regions of the curve and so the curve influences the three color components of our color patch to differing degrees. R, G and B are different in value for colored pixels. Next let's take a look at a colored pixel. ![]()
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