1#!F-adobe-helvetica-medium-r-normal--18* 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 57