Nikon 25338 User Manual - Page 170
Luminosity Mode, RGB Mode
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Chapter 23 164 Black points are normally set on what should be the darkest point of the image and are used to establish one end of the dynamic range of the image. The Double-Threshold function within the Photo Info's Histogram section is designed specifically to help you locate the darkest and lightest sections of your image. Please see page 100 for more information on how to use the Double-Threshold function. A Black Control Point is often used in conjunction with a White Control Point. the Luminosity to controlling the values for red, green, and blue separately. You can also hide the Black Control Point or reset it to the default settings. Luminosity Mode Control Points Menu After you place a Black Control Point on your image, a Black Point Dialog Box appears next to the Edit List. The Black Control Point can be repositioned by clicking and dragging on it. It can be deleted by selecting the Control Point and pressing the Delete key on your keyboard, and it can be modified using the Control Point's slider. After placing the Black Control Point, you can control the luminosity of the black point either by using a slider or by entering a luminosity value into the Black Point Dialog Box. Use the Reset button to return the settings of the Black Control Point to the default settings. The Luminosity Mode of the Black Control Point always changes the color that you have targeted by setting the Black Control Point to a neutral black. This is often the most efficient mode to use, as most calibrated printers work best when the image is set to a neutral black. Within this mode, you are presented with only one slider on the Black Control Point and only one entry box in the Black Point dialog. When you click on the Advanced button, the advanced controls for the Black Control Point are displayed within the Black Point Dialog Box. Within the Advanced area of the Black Point Dialog Box, you have the option of changing the method of controlling the Black Control Point from controlling only RGB Mode The RGB Mode of the Black Control Point enables you to set the individual red, green, and blue values of the target to black. This option is helpful if your printer requires a non-neutral black. Within this mode, you are presented with three sliders on the
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