rgbprocess_lib.cpp File Reference

Operations on the RGB color cube (filtering, display density, ...). More...

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "rgbprocess_lib.h"
#include "cppcode/rgbcubeIPOL.h"

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Functions
void	input2RGB (unsigned char *input, unsigned char **RR, unsigned char **GG, unsigned char **BB, int size)
	Convert color data from 1 array with format RR...RRGG...GGBB...BB to 3 arrays with formats RRR..., GGG..., BBB...
void	RGB2output (unsigned char *R, unsigned char *G, unsigned char *B, unsigned char *output, int size)
	Convert color data from 3 arrays with formats RRR..., GGG..., BBB... to 1 array with format RR...RRGG...GGBB...BB.
void	rgbprocess (unsigned char *input1, unsigned char *input2, unsigned char *input3, int w, int h, unsigned char *output1, unsigned char *output2, unsigned char *output3, int wOut, int hOut, const char *option)
	Main function: calls functions that perform different operations on the color cube.
void	RGBviewsparams (const char *nameparams)
	Computes parameters (position and coordinates vectors) of a set of projection planes for displaying different views of the RGB color cube. Stores results in a text file.
void	getRGBview (unsigned char *input, int w, int h, unsigned char *I, unsigned char *output, int wview, int hview, float P[3], float u[3], float v[3])
	Creates an image displaying the orthonormal projection of the RGB cube of a color image onto a plane defined by its position P in RGB space and by two coordinates vectors u, v.
float	computeRMSE (unsigned char *input1, unsigned char *input2, int w, int h, float &dmean)
	Compute Root Mean Squared Error (RMSE) and Average Distance (dmean) between two sets of colors in RGB space.
int	countcolors (unsigned char *input, int w, int h)
	Count the number of different colors in an image.
void	RGB2VRML2 (unsigned char *input, int w, int h, unsigned char *Idsty, const char *nameout)
	Creates a file in VRML 2.0 format containing the list of color points of an input image. Each point is either displayed with its original RGB color or with a gray level value proportional to the density of the color.

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Detailed Description

Operations on the RGB color cube (filtering, display density, ...).

Author:

Jose-Luis Lisani <joseluis.lisani@uib.es>

Definition in file rgbprocess_lib.cpp.

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Function Documentation

float computeRMSE	(	unsigned char *	input1,
		unsigned char *	input2,
		int	w,
		int	h,
		float &	dmean
	)

Compute Root Mean Squared Error (RMSE) and Average Distance (dmean) between two sets of colors in RGB space.

Parameters:

[in]	input1,input2	input images whose colors are to be compared
[in]	w,h	input image dimensions
[out]	dmean	average distance between corresponding colors

Returns:

RMSE value

Definition at line 445 of file rgbprocess_lib.cpp.

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int countcolors	(	unsigned char *	input,
		int	w,
		int	h
	)

Count the number of different colors in an image.

Parameters:

[in]	input	input image
[in]	w,h	input image dimensions

Returns:

number of colors

Definition at line 480 of file rgbprocess_lib.cpp.

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void getRGBview	(	unsigned char *	input,
		int	w,
		int	h,
		unsigned char *	I,
		unsigned char *	output,
		int	wview,
		int	hview,
		float	P[3],
		float	u[3],
		float	v[3]
	)

Creates an image displaying the orthonormal projection of the RGB cube of a color image onto a plane defined by its position P in RGB space and by two coordinates vectors u, v.

Parameters:

[in]	input	input image
[in]	w,h	input image dimensions
[out]	output	output image
[in]	wview,hview	output image dimensions
[in]	P	position of projection plane in RGB space (center of the plane)
[in]	u,v	vectors defining a coordinates system on the plane

See also:

projectRGBcubeB

Definition at line 407 of file rgbprocess_lib.cpp.

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void input2RGB	(	unsigned char *	input,
		unsigned char **	RR,
		unsigned char **	GG,
		unsigned char **	BB,
		int	size
	)

Convert color data from 1 array with format RR...RRGG...GGBB...BB to 3 arrays with formats RRR..., GGG..., BBB...

Parameters:

[in]	input	input array
[out]	RR,GG,BB	output arrays [in] size number of colors

Definition at line 59 of file rgbprocess_lib.cpp.

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void RGB2output	(	unsigned char *	R,
		unsigned char *	G,
		unsigned char *	B,
		unsigned char *	output,
		int	size
	)

Convert color data from 3 arrays with formats RRR..., GGG..., BBB... to 1 array with format RR...RRGG...GGBB...BB.

Parameters:

[in]	R,G,B	input arrays
[out]	output	input array [in] size number of colors

Definition at line 90 of file rgbprocess_lib.cpp.

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void RGB2VRML2	(	unsigned char *	input,
		int	w,
		int	h,
		unsigned char *	Idsty,
		const char *	nameout
	)

Creates a file in VRML 2.0 format containing the list of color points of an input image. Each point is either displayed with its original RGB color or with a gray level value proportional to the density of the color.

Parameters:

[in]	input	input image
[in]	Idsty	density image
[out]	nameout	output file name

Returns:

number of colors

Definition at line 511 of file rgbprocess_lib.cpp.

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void rgbprocess	(	unsigned char *	input1,
		unsigned char *	input2,
		unsigned char *	input3,
		int	w,
		int	h,
		unsigned char *	output1,
		unsigned char *	output2,
		unsigned char *	output3,
		int	wOut,
		int	hOut,
		const char *	option
	)

Main function: calls functions that perform different operations on the color cube.

Parameters:

[in]	input1,input2,input3	input images
[in]	w,h	dimensions of the input images
[in]	output1,output2,output3	output images
[in]	wOut,hOut	dimensions of the output images
[in]	option	processing option

Processing options:

filter: applies LLP2 algorithm to input1, saves result to output1 (calls filtercolor function in rgbcubeIPOL.cpp)

rmisolated: removes isolated color points from input1, saves result to output1 (calls removeisolatedRGB function in colorfiltering.cpp)

pcaviews: creates 3 images (output1, output2, output3) displaying the principal views of the RGB cube of image input1 (calls function PCAviews in rgbcubeIPOL.cpp)

pcaviewsB: creates 1 image (output1) displaying the 3 principal views of the RGB cube of image input1 (calls function PCAviewsB in rgbcubeIPOL.cpp)

densityviews: creates 1 image (output1) displaying the 3 principal views of the RGB cube of image input1, each color point is displayed with a grey level proportional to its density in the color cube (lighter for higher densities) (calls PCAviews_densityB in rgbcubeIPOL.cpp)

densityImage: creates a gray-scale image (output1) with values proportional to the density of the colors of image input1 (calls densityImage function in rgbcubeIPOL.cpp)

mergeimages: creates one output image (output1) from two inputs (input1, input2) such that output1=input1 except at pixels with (0, 0, 0) RGB value, which are replaced by pixels of input2

combineimages: creates one output image (output1) from three inputs (input1, input2, input3), arranged in horizontal direction

combineimagesB: creates one output image (output1) from three inputs (input1, input2, input3), arranged in two rows: first row displays input1 and input2 and second row input3 (centered)

Definition at line 155 of file rgbprocess_lib.cpp.

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void RGBviewsparams

(

const char *

nameparams

)

Computes parameters (position and coordinates vectors) of a set of projection planes for displaying different views of the RGB color cube. Stores results in a text file.

Parameters:

[out]

nameparams

name of output file

See also:

RGBviews_sequence_params

Definition at line 384 of file rgbprocess_lib.cpp.

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