ncl_yiqrgb - Man Page

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

#include <ncarg/ncargC.h>

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

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.

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

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

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

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

Hardcopy: NCAR Graphics Fundamentals, UNIX Version

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