Autodesk 05726-091452-9064 User Guide - Page 77

6 Color Correction and Color Filtration To change color profile Choose Gamma Correction from the rImage menu or click the WiseImage toolbar. button on the The Gamma Correction dialog is displayed. Do the following: § Specify white and black points using the relevant eyedropper tools; § Choose Master or specify a color in the Channel list; § Create Gamma curve automatically or adjust it manually; § See the results in the preview window. Press Apply. Specifying black and white points Use the buttons to pick the black or white point values directly from the image. Select an appropriate tool and draw an area on the screen. The color point section of the Gamma Correction dialog allows for precise adjustment of color values. If any values are set different from (0,0,0) for a black point and/or (255,255,255) for a white point, then the points located outside this range will not be affected by the Gamma correction procedure. The Auto Set button calculates the black and white point values automatically for every color channel. The histogram in the middle of the dialog window reflects color brightness distribution. The curve for every channel can be changed separately. Click to reset the gamma curve. 79