#!F-adobe-helvetica-medium-r-normal--18* #!N #!CDarkGreen #!N #!Rall23 Opening the Colormap Editor: #!N #!EC #!N #!I0 #!N #!F-adobe-times-medium-r-normal--18* #!N #!N #!I30 #!N 1. Select #!F-adobe-times-bold-r-normal--18* Open All Colormap Editors #!EF in the #!F-adobe-times-bold-r-normal--18* Windows #!EF pull-down menu of the Image window. Now changes made in the Colormap Editor ( #!Lcmaped9,dxall25 f Figure 9 #!EL ) will be reflected both in the editor and in the image. (Data Explorer should still be in #!F-adobe-times-bold-r-normal--18* Execute on Change #!EF mode from the preceding exercise. If not, select that mode in any #!F-adobe-times-bold-r-normal--18* Execute #!EF pull-down menu.) For example: #!N #!I30 #!N 2. Move the mouse cursor into the large rectangle under the #!F-adobe-times-bold-r-normal--18* Hue #!EF label button (the cursor changes from an arrow to a circle with sight marks). #!N #!I30 #!N 3. Use the left mouse button to drag the #!F-adobe-times-medium-i-normal--18* control point #!EF (the small box in the upper left-hand corner of the rectangle) horizontally to a position under #!F-adobe-times-bold-r-normal--18* Hue #!EF . The color column to the left changes as the point moves. Note: The #!F-adobe-times-bold-r-normal--18* Hue #!EF button is automatically activated when the mouse button is pressed with the cursor positioned in the #!F-adobe-times-bold-r-normal--18* Hue #!EF rectangle. #!N #!I30 #!N 4. Release the mouse button. Color changes appear in the object. #!N #!I30 #!N 5. Drag the control point back to its original position and release the mouse button. The color column and the object return to their original states. #!N #!I0 #!N #!EF #!N #!Rcolmped1 #!T,1,161,321,646 #!F-adobe-times-bold-r-normal--18* #!N TAB Characteristic TAB Description TAB Numerical Range/ #!N TAB - TAB - TAB Image Values #!EF #!N TAB Hue TAB A particular color TAB 0.000 = Red #!N TAB - TAB - TAB 0.333 = Green #!N TAB - TAB - TAB 0.666 = Blue #!N TAB - TAB - TAB 1.000 = Red #!N TAB Saturation TAB Purity of color TAB 0.0 = White (all colors) #!N TAB - TAB - TAB 0.5 = "Pastel" (50% of one color) #!N TAB - TAB - TAB 1.0 = Pure (100% of one color) #!N TAB Value TAB Degree of brightness TAB 0.0 = Black (0% brightness) #!N TAB - TAB - TAB 0.5 = Dark (50% brightness) #!N TAB - TAB - TAB 1.0 = Maximum (100% brightness) #!N TAB Opacity TAB Degree of transparency TAB 0.0 = 0% Opaque (100% transparent) #!N TAB - TAB - TAB 0.5 = Semi-opaque (50% transparent) #!N TAB - TAB - TAB 1.0 = 100% Opaque (0% transparent) Table 1. Image Characteristics Controlled by the Colormap Editor. The numerical range used in specifying discrete values of a characteristic is 0.0-1.0. Corresponding Colormap values at the limits and middle of a range are also listed. #!N #!N Before going any further, you should familiarize yourself briefly with the Colormap Editor ( #!Lcmaped9,dxall25 f Figure 9 #!EL ). Note that the four labeled rectangles to the right correspond to the characteristics listed in #!Lcolmped1,dxall24 t Table 1 #!EL . In each rectangle, at least two control points (very small "boxes") and a line connecting them determine how the image characteristics associated with a particular data value are represented in the image (the figure shows the default settings). #!N #!N Changes in the position of a control point are reflected directly in the two left-hand columns of the editor and (in #!F-adobe-times-bold-r-normal--18* Execute on Change #!EF mode) in the Image window. The "data range" from the bottom to the top of the color column is the range of actual data values for which image characteristics (e.g., hue) can be specified. #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Lall24,dxall25 h Specifying Colormap Values #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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