#!F-adobe-helvetica-medium-r-normal--18* #!N #!CSeaGreen #!N #!Rentv Entering Values in a Colormap Editor #!N #!EC #!N #!N The Colormap Editor specifies color in the hue, saturation, and value (HSV) color space. #!F-adobe-times-medium-i-normal--18* Hue #!EF refers to the color, for example, blue, red or yellow. The range of the hue goes from red to green to blue back to red again. #!F-adobe-times-medium-i-normal--18* Saturation #!EF refers to the purity of the color, and is a value between 0 and 1. A saturation of 1 is pure color; as saturation decreases, the color becomes more pastel, becoming white when saturation is 0. #!F-adobe-times-medium-i-normal--18* Value #!EF is the brightness of the color, and is a value between 0 to 1. A value of 1 is maximum brightness; as value decreases, the color becomes darker, becoming black when value is 0. #!N #!N For a thorough understanding of color and the color elements of hue, saturation, value, and opacity, and other elements of computer graphics that might relate to the Colormap characteristics, you may want to refer to a computer graphics text. #!N #!N You can display the Colormap Editor by selecting the #!F-adobe-times-bold-r-normal--18* Open All Colormap Editors #!EF option on the #!F-adobe-times-bold-r-normal--18* Windows #!EF menu of the Image window or by double-clicking on the Colormap tool in the VPE window. The Colormap Editor displays default settings for each of the three HSV color space parameters, as shown in the first three boxed areas on the right hand side of the window. These three areas, labeled #!F-adobe-times-bold-r-normal--18* Hue #!EF , #!F-adobe-times-bold-r-normal--18* Saturation #!EF , and #!F-adobe-times-bold-r-normal--18* Value #!EF , each work independently of one another. As you change their values, the RGB boxed area at the left of the window changes automatically to correspond. #!N #!N The #!F-adobe-times-bold-r-normal--18* Opacity #!EF area, located on the far right hand side of the Colormap Editor window, works in a similar way. As you make changes in the opacity area, the background bar (located to the right of the RGB bar) reflects your work. It shows your adjustments to the opacity of the image in relation to the background colors. By default, the background bar appears as two vertical stripes. However, if it is easier for you to judge the colors of the image and background with a checkerboard-style bar, select the #!F-adobe-times-bold-r-normal--18* Set Background Style to Checkboard #!EF option on the #!F-adobe-times-bold-r-normal--18* Options #!EF menu (see #!Lcmapom,dxall468 h Colormap Options Menu #!EL ). #!N #!N In order to perform certain operations on an area, it must be selected. To select an area either click on the area's label or click in the area itself. Only one area can be selected at a time. When an area is selected, its label is depressed. #!N #!N The range of data values onto which HSV and opacity values are mapped is controlled by the #!F-adobe-times-bold-r-normal--18* min #!EF and #!F-adobe-times-bold-r-normal--18* max #!EF fields located near the bottom and top of the Colormap Editor window. By default, #!F-adobe-times-bold-r-normal--18* min #!EF is set to 0, and #!F-adobe-times-bold-r-normal--18* max #!EF is set to 100. You can change this range to values more appropriate for your data by clicking on either field, typing the new value, and pressing the Enter key. #!N #!N Control points are used to define the value of hue, saturation, value, and opacity for a given data value. The number and position of control points can be different in each of the areas. The control points appear as small squares on the vertical scale marks in each of the four areas. #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Ladconp,dxall367 h Adding Control Points #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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