Standard Library procedure that lets you interactivelycreate color tables based on the HLS or HSV color system.
(optional) Contains the color values of the final color table in the form of a two-dimensional array that has the number of colors in the color table as the first dimension and the integer 3 as the second dimension. The values for red are stored in the first row, the values for green are stored in the second row, and those for blue in the third row; in other words:
green = colors_out(*, 1)
blue = colors_out(*, 2)
If set to 1, indicates the HLS (hue, lightness, saturation) color system should be used.HSV
If set to 1, indicates the HSV (hue, saturation, value) color system should be used. (Default: 1)
Figure 2-9 The COLOR_EDIT window lets you use the mouse to create a new color table based on either the HLS or HSV color system.
Figure 2-10 The COLOR_EDIT window lets you use the mouse to create a new color table based on either the HLS or HSV color system.
TIP: If you need greater control of HSV colors near zero percent saturation, use the C_EDIT procedure.
Displays the current color table. It is updated as changes are made to the color table. (When COLOR_EDIT is initialized, it sets the current color table to red.)
Lets you simultaneously select the hue (position from the azimuth of the wheel) and saturation (distance from the center of the wheel) with the cursor.
Use the top bar to select either the value (HSV system) or the lightness (HLS system) parameter, depending on the system in use. Use the bottom bar to select the pixel value that will become a tie point (explained below).
Plots the current values of the three color system parameters versus pixel value. These graphs are updated as tie points are selected and the color table is changed.
Value/Lightness slider bar and color wheel by dragging the left mouse button within each until you reach the first color you want in your color table.
Pixel Value slider bar, click with the left mouse button at the position where you want that particular color to be. The range on this bar begins at 0 and ends with the maximum value for your color table.)
Windows Users: If you have a two-button mouse, useAlt
in combination with the left mouse button to erase the tie point.
Value/Lightness slider bar and color wheel and entering the corresponding tie point in the Pixel Value slider bar.
TVSCL, FINDGEN(256, 256) COLOR_EDIT, rgb_array
User modifies the color table and exits the procedure.
SAVE, filename='my_colortable', rgb_array LOADCT, 2 RESTORE, 'my_colortable' rgb_array=REFORM(rgb_array, N_ELEMENTS(rgb_array)/3, 3) TVLCT, rgb_array(*, 0), rgb_array(*, 1), rgb_array(*, 2)
TVSCL, FINDGEN(256, 256) COLOR_EDIT
User modifies the color table and exits the procedure.
TVLCT, r, g, b, /get SAVE, filename='my_colortable_2', r, g, b LOADCT, 8 RESTORE, 'my_colortable_2' TVLCT, r, g, b
For additional background information about color systems, see the PV-WAVE User's Guide.
