clr2float.cxx File Reference

#include <stdlib.h>
#include <stdio.h>
#include "clr2float.h"

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Defines
#define	TABLE_LEN   256
Functions
int	initTable (unsigned char threshold, float k)
	Initializes the transform table.
int	gray2float (const IplImage *src, CvMat **dest, unsigned char threshold, float k, IplImage *thresholded)
	Transforms a grayscale image to its float representation.
int	clr2float (const IplImage *src, CvMat **dest, unsigned char threshold, float k, IplImage *thresholded)
	Transforms a colorful image to its float representation.
Variables
CvMat *	lut = NULL
unsigned char	currentThr = 0
float	currentK = 0.0

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Define Documentation

#define TABLE_LEN   256

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Function Documentation

int clr2float	(	const IplImage *	src,
		CvMat **	dest,
		unsigned char	threshold,
		float	k,
		IplImage *	thresholded
	)

Transforms a colorful image to its float representation.

Parameters:

	src	Image in BGR format.
	dest	Pointer to a destination matrix.
	threshold	Level of gray which will transform to zero.
	k	Saturation - if k>1.0, differences between positive and negative values grow.
	thresholded	If not NULL, BW thresholded version of src is stored here.

Returns:

Length of the destination data, or negative if an error occurs.

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int gray2float	(	const IplImage *	src,
		CvMat **	dest,
		unsigned char	threshold,
		float	k,
		IplImage *	thresholded
	)

Transforms a grayscale image to its float representation.

Parameters:

	src	Image in GRAY format.
	dest	Pointer to a destination matrix.
	threshold	Level of gray which will transform to zero.
	k	Saturation - if k>1.0, differences between positive and negative values grow.
	thresholded	If not NULL, BW thresholded version of src is stored here.

Returns:

Length of the destination data, or negative if an error occurs.

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int initTable	(	unsigned char	threshold,
		float	k
	)

Initializes the transform table.

It can then be used to quickly transform from {0..255} to <-1,1>.

Parameters:

	threshold	Value which will be transformed to zero.
	k	Saturation - if k>1.0, differences between positive and negative values grow. Must not be zero.

Returns:

Zero on success, 1 if table was already initialized, negative value in case of invalid parameter value.

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Variable Documentation

float currentK = 0.0

unsigned char currentThr = 0

CvMat* lut = NULL