Nikon 9235 Reference Manual - Page 72

White Point and Black Point Output Levels Once you have set the input level for the black point and white point, output levels can be altered to reflect the actual shade of the darkest and brightest pixels in the image. If the darkest shade in the image represents a true black, for example, the output level for the black point can be left at zero. If, however, darkest shade present in the image is a lighter color, the output level for the black point can be raised to achieve more natural coloration. To set the output level, click the slider once to activate it, then drag it up or down until you have found the desired output level (the output level can also be set by entering a value directly in the text box to the left of the slider).The effects of the change will be reflected in the active image. The output levels for the white point and black point are set using the white-point and black-point output sliders on the left side of the curve edit display. White-point output slider Black-point output slider It is sometimes the case that the darkest and lightest points of the image should not be displayed or printed as a saturated black or white, even where the colors in the original image represent a true black or true white. The reasons for this are varied, but include: • The need to reduce the amount of ink consumed by making blacks less saturated • The need to prevent an undesirable line from appearing when a true white is printed using ink (for example, when printing whites on a colored background) • The need to prevent distortion on monitor or television sets caused by very strong or very weak signals at the edges of the screen Pg. For more information on: Reference:The Tool Chest 134 Setting default output values for the eyedropper tools 71