Nikon 25338 User Manual - Page 229
Color Management, Preferences Macintosh, Levels & Curves, The Curves Tool and the LCH
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Color Management Preferences (Macintosh) Default Color-Space Profiles See Appendix: Supplied Color Profiles for more information on the default RGB color-space profiles. The "NKCMYK.icm" (Windows) and "Nikon CMYK 4.0.0.3000" (Macintosh) CMYK profiles provided with Capture NX are general-purpose, almost neutral profiles that are not based on a specific ink set, making them suited for use where output conditions are not known. Please note: See Appendix: Supplied Color Profiles ( 214) for more information on the default RGB color-space profiles. Levels & Curves The Curves Tool and the LCH Editor The Curves tool controls the distribution of tones in the red, green, and blue channels and in the RGB master channel, and provides visual feedback on the amount of tone information lost through editing. The LCH Editor is a better tool for making fine adjustments to luminosity (brightness), color saturation, and hue; note, however, that changes to these settings may produce results that exceed the dynamic range of the RGB channels. 223 Auto Contrast Settings Auto contrast, shadow, and highlight settings can be adjusted in the Levels & Grid tab of the Preferences dialog. The Curve Edit Display Although values for input and output in the Curves palette range from zero to 255 (eight-bit precision, familiar to users of other image editing software), the results of any changes to curves are calculated at a precision of sixteen bits. This allows twelve-bit RAW data to be modified without lowering the quality of the output. The Histogram (RAW / 16-Bit TIFF Images Only) To reduce display times when dealing with large amounts of image data, Capture NX may display a histogram containing vertical lines. Sampling White Point or Black Point for the Current Channel By default, sampling sets the white point or black point for all channels and displays the master channel. To set the white or black point for the current channel only, sample the image while pressing Ctrl (Windows) or Command (Macintosh). Midpoint cannot be sampled for a single channel; regardless of the channel currently selected, sampling the image for midpoint always sets the mid point for all channels and displays the master channel. Advisories & Additional Notices Appendix