Nikon 25338 User Manual - Page 144

Chapter 22 138 Channel Selector White Output Slider Black Output Slider Show Before/After Histogram Auto Contrast Button White Point Dropper Neutral Point Dropper Black Point Dropper Add Anchor Point Reset Current Channel Reset All Channels Temporary Cancel Button Adjust Menu Black Point Mid Point White Point different channels quickly by using the following keyboard shortcuts: RGB Channels: Ctrl + ~ (Windows) Command + ~ (Mac OS) Red Channel: Ctrl + 1 (Windows) Command + 1 (Mac OS) Green Channel: Ctrl + 2 (Windows) Command + 2 (Mac OS) Blue Channel: Ctrl + 3 (Windows) Command + 3 (Mac OS) Within this editor you are presented with a histogram that represents the total luminosity values within your image. Superimposed above this histogram, a Curve is displayed that enables you to control the relationship of input luminosity values to output luminosity values. The luminosity histogram represents a bar graph of the total number of pixels that appear at different levels of luminosity. The horizontal axis represents the luminosity level, while the vertical axis represents the number of pixels at each luminosity level found within the current image. The left side of the horizontal axis represents the darkest tones in your image, while the right side represents the lightest tones in the image, based on the active channel selected. When editing all channels simultaneously, the histogram represents lightness from black to white. When editing an individual channel, the histogram represents lightness from the absence of that color to the maximum brightness of that color. The histogram is very helpful in determining how to adjust the settings