Menu "Selectively Correct" in Digital Photo in Photography

The selectively correct menu lets us separately modify the ink proportions that make up a color. The color selector lets us choose any primary or secondary color, whites, blacks and grays. In first instance is works to alter the component cyan, magenta, yellow or black of a color without modifying this component with the others. The effect will be very selective when the color to be modified coincides with the selectors definition, and can have an unclear action when dealing with less pure tones. Selectively correct becomes specially useful for photographs were different types of light are mixed and lets us modify determined colors without altering the others. If, for example, we want to correct the color of an image were there is a more or less balanced zone and another lit by a different color of light, the tool seen until now are quite limited. A case like this can happen when we have made a photograph with film balanced for daylight in an interior were there are zones that are lit by a tungsten light; here the levels or curves menus can't eliminate the unwanted dominant without altering the balanced zones. A fist option would be to make a selection of the zones to be corrected, leaving out the balanced ones. Nevertheless,

sometimes the outline of these zones makes the operation very difficult, and in any case, the effect of the correction will be linear, when what we need is a gradual effect (more correction were there is more unbalance). To obtain better results we can use the submenu selectively correct , with which we can soften reds of the image in the example without affecting the red components of the rest of the tones.

"Tone/Saturation" Menu

In the Tone/Saturation menu we can displace the tones of the image along the length and width of the color wheel. In the complementary color wheel they are places in diametrically opposite positions. There is no saturation in the center of the wheel and maximal in the perimeter. We can change the position of any color of the image (or all) following these directions: around the tone control wheel (a 180º displacement means substituting a color for it's complementary), along the radius with control of the saturation and up and down the cylinder of brightness levels with it's respective control. This lets us regulate the brightness of concrete colors, correct the excess or defect in saturation of all or some of the colors of the image when these have been degraded and, in a similar way to the selectively correct menu, gives us the possibility of substituting a color for another different one without affecting the rest.