Referencia del Archivo cv_yuv_codebook.h

#include <cv.h>
#include <highgui.h>
#include <cxcore.h>

Ir al código fuente de este archivo.

Clases
struct	ce
struct	code_book

'defines'
#define	CHANNELS   3

'typedefs'
typedef struct ce	code_element
typedef struct code_book	codeBook

Funciones
int	cvupdateCodeBook (uchar *p, codeBook &c, unsigned *cbBounds, int numChannels=3)
uchar	cvbackgroundDiff (uchar *p, codeBook &c, int numChannels, int *minMod, int *maxMod)
int	cvclearStaleEntries (codeBook &c)
int	cvcountSegmentation (codeBook *c, IplImage *I, int numChannels, int *minMod, int *maxMod)
void	cvconnectedComponents (IplImage *mask, int poly1_hull0=1, float perimScale=4.0, int *num=NULL, CvRect *bbs=NULL, CvPoint *centers=NULL, int nClose=0)

Documentación de los 'defines'

#define CHANNELS   3

Documentación de los 'typedefs'

typedef struct ce code_element

typedef struct code_book codeBook

Documentación de las funciones

uchar cvbackgroundDiff	(	uchar *	p,
		codeBook &	c,
		int	numChannels,
		int *	minMod,
		int *	maxMod
	)

uchar cvbackgroundDiff(uchar *p, codeBook &c, int minMod, int maxMod) Given a pixel and a code book, determine if the pixel is covered by the codebook

p pixel pointer (YUV interleaved) c codebook reference numChannels Number of channels we are testing maxMod Add this (possibly negative) number onto max level when code_element determining if new pixel is foreground minMod Subract this (possible negative) number from min level code_element when determining if pixel is foreground

NOTES: minMod and maxMod must have length numChannels, e.g. 3 channels => minMod[3], maxMod[3].

Return 0 => background, 255 => foreground

int cvclearStaleEntries

(

codeBook &

c

)

int clearStaleEntries(codeBook &c) After you've learned for some period of time, periodically call this to clear out stale codebook entries

c Codebook to clean up

Return number of entries cleared

void cvconnectedComponents	(	IplImage *	mask,
		int	poly1_hull0 = 1,
		float	perimScale = 4.0,
		int *	num = NULL,
		CvRect *	bbs = NULL,
		CvPoint *	centers = NULL,
		int	nClose = 0
	)

void cvconnectedComponents(IplImage *mask, int poly1_hull0, float perimScale, int *num, CvRect *bbs, CvPoint *centers, int nClose) This cleans up the forground segmentation mask derived from calls to cvbackgroundDiff

mask Is a grayscale (8 bit depth) "raw" mask image which will be cleaned up

OPTIONAL PARAMETERS: poly1_hull0 If set, approximate connected component by (DEFAULT) polygon, or else convex hull (0) perimScale Len = image (width+height)/perimScale. If contour len < this, delete that contour (DEFAULT: 4) num Maximum number of rectangles and/or centers to return, on return, will contain number filled (DEFAULT: NULL) bbs Pointer to bounding box rectangle vector of length num. (DEFAULT SETTING: NULL) centers Pointer to contour centers vectore of length num (DEFULT: NULL)

int cvcountSegmentation	(	codeBook *	c,
		IplImage *	I,
		int	numChannels,
		int *	minMod,
		int *	maxMod
	)

int countSegmentation(codeBook *c, IplImage *I)

Count how many pixels are detected as foreground c Codebook I Image (yuv, 24 bits) numChannels Number of channels we are testing maxMod Add this (possibly negative) number onto max level when code_element determining if new pixel is foreground minMod Subract this (possible negative) number from min level code_element when determining if pixel is foreground

NOTES: minMod and maxMod must have length numChannels, e.g. 3 channels => minMod[3], maxMod[3].

Return Count of fg pixels

int cvupdateCodeBook	(	uchar *	p,
		codeBook &	c,
		unsigned *	cbBounds,
		int	numChannels
	)

int updateCodeBook(uchar *p, codeBook &c, unsigned cbBounds) Updates the codebook entry with a new data point

p Pointer to a YUV pixel c Codebook for this pixel cbBounds Learning bounds for codebook (Rule of thumb: 10) numChannels Number of color channels we're learning

NOTES: cvBounds must be of size cvBounds[numChannels]

RETURN codebook index