HSV Procedure

Standard Library procedure that generates and loads color tables into an image display device based on the HSV color system. The final color table is loaded into the display device.

Usage

HSV, vlo, vhi, stlo, sthi, hue, lp [, rgb]

Input Parameters

vlo

The starting color value or intensity, expressed as 0 to 100 percent. Full intensity is 100 percent.

vhi The ending color value or intensity, expressed as 0 to 100 percent.

stlo The starting color saturation, expressed as 0 to 100 percent. Full saturation (undiluted or pure color) is expressed as 100 percent.

sthi The ending color saturation, expressed as 0 to 100 percent.

hue The starting hue, expressed as 0 to 360 degrees.

lp The number of loops around the color cone. The value may be floating-point. A positive value will traverse the color cone in a clockwise direction; a negative value will traverse the color cone in a counterclockwise direction.

Output Parameters

rgb

(optional) A 256-by-3 integer output array containing the red, green, and blue vector values that were translated from the HSV system and loaded into the color tables. The following example shows the ordering of the RGB values in the output array:

Red_Vec(i) = RGB(i, 0)
Green_Vec(i) = RGB(i, 1)
Blue_Vec(i) = RGB(i, 2)

HSV, 0, 100, 50, 100, 0, -2.5

loads a color table that ranges from 0 to 100 percent in intensity or brightness and from 50 to 100 percent in saturation. This color table begins with a color of red, and makes two and a half full loops around the color solid in the direction of red to blue.

HSV Procedure

Usage

Input Parameters

Output Parameters

Keywords

Discussion

Example

See Also