91 lines
2.7 KiB
C
Executable File
91 lines
2.7 KiB
C
Executable File
/** \file
|
|
* \brief HSI Color Manipulation
|
|
*
|
|
* See Copyright Notice in im_lib.h
|
|
*/
|
|
|
|
#ifndef __IM_COLORHSI_H
|
|
#define __IM_COLORHSI_H
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/** \defgroup hsi HSI Color Coordinate System Conversions
|
|
*
|
|
* \par
|
|
* HSI is just the RGB color space written in a different coordinate system.
|
|
* \par
|
|
* "I" is defined along the cube diagonal. It ranges from 0 (black) to 1 (white). \n
|
|
* HS are the polar coordinates of a plane normal to "I". \n
|
|
* "S" is the normal distance from the diagonal of the RGB cube. It ranges from 0 to 1. \n
|
|
* "H" is the angle starting from the red vector, given in degrees. It ranges from 0 to 360. \n
|
|
* R,G,B when double must be normalized between 0-1.
|
|
* \par
|
|
* This is not a new color space, this is exactly the same gamut as RGB. \n
|
|
* \par
|
|
* See \ref im_colorhsi.h
|
|
* \ingroup color */
|
|
|
|
|
|
/** Converts from RGB to HSI.
|
|
* \ingroup hsi */
|
|
void imColorRGB2HSI(double r, double g, double b, double *h, double *s, double *i);
|
|
|
|
/** Converts from RGB (byte) to HSI.
|
|
* \ingroup hsi */
|
|
void imColorRGB2HSIbyte(unsigned char r, unsigned char g, unsigned char b, double *h, double *s, double *i);
|
|
|
|
/** Converts from HSI to RGB.
|
|
* \ingroup hsi */
|
|
void imColorHSI2RGB(double h, double s, double i, double *r, double *g, double *b);
|
|
|
|
/** Converts from HSI to RGB (byte).
|
|
* \ingroup hsi */
|
|
void imColorHSI2RGBbyte(double h, double s, double i, unsigned char *r, unsigned char *g, unsigned char *b);
|
|
|
|
/** Returns just the hue of the color RGB.
|
|
* \ingroup hsi */
|
|
double imColorHue(double R, double G, double B);
|
|
|
|
/** Returns just the hue of the color RGB (byte).
|
|
* \ingroup hsi */
|
|
double imColorHueByte(unsigned char r, unsigned char g, unsigned char b);
|
|
|
|
/** Returns just the intensity of the color RGB.
|
|
* \ingroup hsi */
|
|
double imColorIntensity(double R, double G, double B);
|
|
|
|
/** Returns just the intensity of the color RGB (byte).
|
|
* \ingroup hsi */
|
|
double imColorIntensityByte(unsigned char r, unsigned char g, unsigned char b);
|
|
|
|
/** Returns just the saturation of the color RGB.\n
|
|
* Here S is not normalized by Smax.
|
|
* \ingroup hsi */
|
|
double imColorSaturation(double R, double G, double B);
|
|
|
|
/** Returns just the saturation of the color RGB (byte).
|
|
* \ingroup hsi */
|
|
double imColorSaturationByte(unsigned char r, unsigned char g, unsigned char b);
|
|
|
|
|
|
/***********************************************/
|
|
|
|
/** Returns I where S is maximum given H (here in radians).
|
|
* \ingroup hsi */
|
|
double imColorHSI_ImaxS(double h, double cosH, double sinH);
|
|
|
|
|
|
/** Returns maximum S (unnormalized) given I and H (here in radians).
|
|
* \ingroup hsi */
|
|
double imColorHSI_Smax(double h, double cosH, double sinH, double i);
|
|
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif
|