HSV

The HSV procedure creates a color table based on the HSV (Hue, Saturation, and Value) color system.

Using the input parameters, a spiral through the single-ended HSV cone is traced. Points along the cone are converted from HLS to RGB. The current colortable (and the COLORS common block) contains the new colortable on exit.

This routine is written in the IDL language. Its source code can be found in the file hsv.pro in the lib subdirectory of the IDL distribution.

Calling Sequence

HLS , Vlo, Vhi, Satlo, Sathi, Hue, Loops [, Colr]

Arguments

Vlo

Starting value, from 0 to 100%.

Vhi

Ending value, from 0 to 100%.

Satlo

Starting saturation, from 0 to 100%.

Sathi

Ending saturation, from 0 to 100%.

Hue

Starting Hue, from 0 to 360 degrees. Red = 0 degs, green = 120, blue = 240.

Loops

The number of loops through the color spiral. This parameter does not have to be an integer. A negative value causes the loops to traverse the spiral in the opposite direction.

Colr

An optional (256,3) integer array in which the new R, G, and B values are returned. Red = Colr [*,0], green = Colr [*,1], blue = Colr [*,2].

See Also

COLOR_CONVERT , HLS , PSEUDO