![]() ![]() This is the bane of digital capture, in my humble opinion! Lets see what happens when we fix this. Reading the RGB values confirms this-the reading of 31,1,1 is unrealistically colorful-we can see a sort of band of extra deep color right next to the black shadow. Looking at the deep shadow at her right arm, we can see a subtle region of exaggerated color in the deep shadow. Lets take a look using the following example: The RGB values in the arm, right before it goes to zero black is 31, 1, 1 – way too colorful for a shadow this dark! If you can correct for the tendency to increase color in the shadows as contrast is increased, you can achieve a more natural sense of contest and 3D shape in the image. Our natural perception of color decreases with reduced light, such that, as a shadow approaches black, color saturation is gradually reduced to zero. This makes shadow values unrealistically colorful. ![]() It seems that when contrast increases this way a global increase in saturation results that increases the chroma, or colorfulness, evenly throughout the image. Even standard rendering presets increase contrast a bit through a global RGB composite curve, often indirectly. But sometimes, digitally captured images have a certain exaggerated colorfulness, that just looks a little off, for those of us raised on the old fashioned film days! I have found that this has to do with the way color gets saturated as contrast increases. Digital capture technology is really awesome and has truly changed photography, improving it in a multitude of ways. ![]()
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