ncl_yiqrgb man page

YIQRGB — Converts a color specification given in the YIQ color space to the equivalent color specification in the Red, Green, Blue (RGB) color space.

Synopsis

CALL YIQRGB (Y, I, Q, R, G, B)

C-Binding Synopsis

#include <ncarg/ncargC.h>

void c_yiqrgb (float y, float i, float q, float *r,
float *g, float *b)

Description

Y

(REAL, input, range [0.,1.])  specifies the color component of a television signal that is shown on black-and-white televisions; Y minimizes the effect of two colors appearing different to the human eye but mapping to similar monochrome intensities.

I

(REAL, input, range [-.6,.6])

Q

(REAL, input, range [-.52,.52])

R

(REAL, output, range [0.,1.])  represents the red intensity component of the output color in RGB color space.

G

(REAL, output, range [0.,1.])  represents the green intensity component of the output color in RGB color space.

B

(REAL, output, range [0.,1.])  represents the blue intensity component of the output color in RGB color space.

C-Binding Description

The C-binding argument descriptions are the same as the FORTRAN  argument descriptions.

Examples

Use the ncargex command to see the following relevant examples:   tcolcv, fcce02.

Access

To use YIQRGB or c_yiqrgb, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order.  

See Also

Online: colconv, hlsrgb, hsvrgb, rgbhls, rgbhsv, rgbyiq, ncarg_cbind.

Hardcopy: NCAR Graphics Fundamentals, UNIX Version

Info

March 1993 UNIX NCAR GRAPHICS