#!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 
