IM: im_colorhsi.h Source File
From IM - Imaging Libray
im_colorhsi.h
Go to the documentation of this file.00001 /** \file 00002 * \brief HSI Color Manipulation 00003 * 00004 * See Copyright Notice in im_lib.h 00005 * $Id: Exp $ 00006 */ 00007 00008 #ifndef __IM_COLORHSI_H 00009 #define __IM_COLORHSI_H 00010 00011 #if defined(__cplusplus) 00012 extern "C" { 00013 #endif 00014 00015 00016 /** \defgroup hsi HSI Color Coordinate System Conversions 00017 * 00018 * \par 00019 * HSI is just the RGB color space written in a different coordinate system. 00020 * \par 00021 * "I" is the cube diagonal. HS is a polar coordinates of a plane normal to "I". 00022 * "S" is the distance from the diagonal. "H" is the angle from red vector. 00023 * \par 00024 * This is not a new color space, this is exactly the same gammut as RGB. \n 00025 * Since it is still a cube, Smax depends on H. 00026 * \par 00027 * See \ref im_colorhsi.h 00028 * \ingroup color */ 00029 00030 00031 /** Returns the maximum S for H (in radians) and I. 00032 * \ingroup hsi */ 00033 float imColorHSI_Smax(float h, double cosh, double sinh, float i); 00034 00035 /** Returns I where S is maximum given H (in radians). 00036 * \ingroup hsi */ 00037 float imColorHSI_ImaxS(float h, double cosh, double sinh); 00038 00039 /** Converts from RGB to HSI. 00040 * \ingroup hsi */ 00041 void imColorRGB2HSI(float r, float g, float b, float *h, float *s, float *i); 00042 00043 /** Converts from RGB (byte) to HSI. 00044 * \ingroup hsi */ 00045 void imColorRGB2HSIbyte(unsigned char r, unsigned char g, unsigned char b, float *h, float *s, float *i); 00046 00047 /** Converts from HSI to RGB. 00048 * \ingroup hsi */ 00049 void imColorHSI2RGB(float h, float s, float i, float *r, float *g, float *b); 00050 00051 /** Converts from HSI to RGB (byte). 00052 * \ingroup hsi */ 00053 void imColorHSI2RGBbyte(float h, float s, float i, unsigned char *r, unsigned char *g, unsigned char *b); 00054 00055 00056 #if defined(__cplusplus) 00057 } 00058 #endif 00059 00060 #endif