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2#!N
3#!CSeaGreen #!N  #!Rentv Entering Values in a Colormap Editor #!N #!EC
4#!N #!N The Colormap Editor specifies color in the hue, saturation,
5and value (HSV) color space.  #!F-adobe-times-medium-i-normal--18*   Hue #!EF refers to the
6color, for example, blue, red or yellow. The range of the
7hue goes from red to green to blue back to red
8again.  #!F-adobe-times-medium-i-normal--18*   Saturation #!EF refers to the purity of the color,
9and is a value between 0 and 1. A saturation of
101 is pure color; as saturation decreases, the color becomes more
11pastel, becoming white when saturation is 0.  #!F-adobe-times-medium-i-normal--18*   Value #!EF is
12the brightness of the color, and is a value between 0
13to 1. A value of 1 is maximum brightness; as value
14decreases, the color becomes darker, becoming black when value is 0.
15#!N #!N For a thorough understanding of color and the color
16elements of hue, saturation, value, and opacity, and other elements of
17computer graphics that might relate to the Colormap characteristics, you may
18want to refer to a computer graphics text. #!N #!N You
19can display the Colormap Editor by selecting the  #!F-adobe-times-bold-r-normal--18*   Open All
20Colormap Editors #!EF option on the  #!F-adobe-times-bold-r-normal--18*   Windows #!EF menu of
21the Image window or by double-clicking on the Colormap tool in
22the VPE window. The Colormap Editor displays default settings for each
23of the three HSV color space parameters, as shown in the
24first three boxed areas on the right hand side of the
25window. These three areas, labeled  #!F-adobe-times-bold-r-normal--18*   Hue #!EF ,  #!F-adobe-times-bold-r-normal--18*   Saturation
26#!EF , and  #!F-adobe-times-bold-r-normal--18*   Value #!EF , each work independently of
27one another. As you change their values, the RGB boxed area
28at the left of the window changes automatically to correspond. #!N
29#!N The  #!F-adobe-times-bold-r-normal--18*   Opacity #!EF area, located on the far right
30hand side of the Colormap Editor window, works in a similar
31way. As you make changes in the opacity area, the background
32bar (located to the right of the RGB bar) reflects your
33work. It shows your adjustments to the opacity of the image
34in relation to the background colors. By default, the background bar
35appears as two vertical stripes. However, if it is easier for
36you to judge the colors of the image and background with
37a checkerboard-style bar, select the  #!F-adobe-times-bold-r-normal--18*   Set Background Style to Checkboard
38#!EF option on the  #!F-adobe-times-bold-r-normal--18*   Options #!EF menu (see  #!Lcmapom,dxall468 h Colormap Options Menu  #!EL  ).
39#!N #!N In order to perform certain operations on an area,
40it must be selected. To select an area either click on
41the area's label or click in the area itself. Only one
42area can be selected at a time. When an area is
43selected, its label is depressed. #!N #!N The range of data
44values onto which HSV and opacity values are mapped is controlled
45by the  #!F-adobe-times-bold-r-normal--18*   min #!EF and  #!F-adobe-times-bold-r-normal--18*   max #!EF fields located
46near the bottom and top of the Colormap Editor window. By
47default,  #!F-adobe-times-bold-r-normal--18*   min #!EF is set to 0, and  #!F-adobe-times-bold-r-normal--18*   max
48#!EF is set to 100. You can change this range to
49values more appropriate for your data by clicking on either field,
50typing the new value, and pressing the Enter key. #!N #!N
51Control points are used to define the value of hue, saturation,
52value, and opacity for a given data value. The number and
53position of control points can be different in each of the
54areas. The control points appear as small squares on the vertical
55scale marks in each of the four areas. #!N #!N #!N
56 #!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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