7-7 Auto Levels/Auto Contrast/Auto Color – Beginner’s Tutorial

0711 The automatic color level is actually the same automatic function we used in the previous curve and color level setting boxes. The color gradation distribution of the three blue channels is expanded to the full color gradation range. This operation can increase color contrast, but may cause a color cast in the image. The specific reasons have been introduced in course #06. As shown in the 2 pictures below. The automatic contrast expands the color scale based on the RGB integrated channel, so it increases the color contrast without causing a color cast. Because of this, in most cases, the effect of increasing color contrast is not as significant as that of Auto Levels. As shown in the 2 pictures below. In addition to increasing color contrast, the Auto Color command will also perform brightness merging on a portion of the highlights and shadows. Most importantly, it corrects colors at 128 levels of brightness to 128 levels of gray. Because of this characteristic of aligning gray, it is possible to correct color casts and also to cause color casts. As shown in the 2 pictures below. Now let’s review the automatic functions we’ve been exposed to in Curves. At…