ellipse.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include <string.h>
#include "include/ellipse.h"

Functions
void	ellipseInit (ELLIPSE *ell)
void	ellipseEmpty (ELLIPSE *ell)
void	ellipseInfo (ELLIPSE *ell)
int	ellipseAllocate (ELLIPSE *ell, int imgDim)
int	ellipseSetFromParams (ELLIPSE *ell, int imgDim, float *semis, float *cent, float incli, float val)
int	ellipseReadEllipse (FILE *fp, ELLIPSE *ell)
int	ellipseSaveEllipse (ELLIPSE *ell, FILE *fp)
float	ellipseGetMajor (ELLIPSE *ell)
float	ellipseGetMinor (ELLIPSE *ell)
float	ellipseGetCenterX (ELLIPSE *ell)
float	ellipseGetCenterY (ELLIPSE *ell)
float	ellipseGetInclination (ELLIPSE *ell)
int	ellipseGetImgSize (ELLIPSE *ell)
int	ellipseGetValue (ELLIPSE *ell)
int **	ellipseGetArray (ELLIPSE *ell)
int	ellipseIsInside (ELLIPSE *ell, int row, int col)

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Function Documentation

int ellipseAllocate (  ELLIPSE *  ell, int  imgDim )

Allocates memory for ELLIPSE data. Normally used only in SET-functions. *ell is initialized && imgDim is positive memory is allocated for ELLIPSE structure. Parameters: ELLIPSE  *ell pointer to ellipse for which the allocation is done. int  imgDim size of the image plane on which the ellipse is to be done. Returns: 0 if ok.

void ellipseEmpty (  ELLIPSE *  ell  )

Frees the memory allocated for ellipse. All data is cleared. . ellipse is emptied. Parameters: ELLIPSE  ell pointer to ellipse to be emptied.

int** ellipseGetArray (  ELLIPSE *  ell  )

Returns the ellipse array of the given ellipse. Ellipse array contains n x n items, single item is one if it is inside the ellipse and zero otherwise. Coordinates on a two dimensional plane are numbered from upper left corner. ell is initialized. . Parameters: ELLIPSE  *ell pointer to ellipse. Returns: the ellipse array of the given ellipse.

float ellipseGetCenterX (  ELLIPSE *  ell  )

Returns the center x-coordinate of the ellipse. ell is initialized. . Parameters: ELLIPSE  *ell pointer to ellipse. Returns: the center x-coordinate of the given ellipse, some negative value if ERROR.

float ellipseGetCenterY (  ELLIPSE *  ell  )

Returns the center y-coordinate of the ellipse. ell is initialized. . Parameters: ELLIPSE  *ell pointer to ellipse. Returns: the center y-coordinate of the given ellipse, some negative value if ERROR.

int ellipseGetImgSize (  ELLIPSE *  ell  )

Returns the size of the image plane on which the ellipse is drawn. ell is initialized. . Parameters: ELLIPSE  *ell pointer to ellipse. Returns: the size of the image plane of the given ellipse, some negative value if ERROR.

float ellipseGetInclination (  ELLIPSE *  ell  )

Returns the inclination of the ellipse. ell is initialized. . Parameters: ELLIPSE  *ell pointer to ellipse. Returns: the inclination of the given ellipse, some negative value if ERROR.

float ellipseGetMajor (  ELLIPSE *  ell  )

Returns the major semiaxe of the ellipse. ell is initialized. . Parameters: ELLIPSE  *ell pointer to ellipse. Returns: the major semiaxe of the given ellipse, some negative value if ERROR.

float ellipseGetMinor (  ELLIPSE *  ell  )

Returns the minor semiaxe of the ellipse. ell is initialized. . Parameters: ELLIPSE  *ell pointer to ellipse. Returns: the minor semiaxe of the given ellipse, some negative value if ERROR.

int ellipseGetValue (  ELLIPSE *  ell  )

Returns the value of the pixels inside the ellipse. Parameters: ELLIPSE  *ell pointer to ellipse. Returns: the value of the pixels inside the ellipse.

void ellipseInfo (  ELLIPSE *  ell  )

Prints the information of the ellipse to the screen. Parameters: ELLIPSE  *ell pointer to ellipse to be printed.

void ellipseInit (  ELLIPSE *  ell  )

Initializes ELLIPSE datatype for use. To be used before any use of ELLIPSE type variables. . ellipse is initialized. Parameters: ELLIPSE  *ell pointer to ellipse to be initialized.

int ellipseIsInside (  ELLIPSE *  ell, int  row, int  col )

Tests whether the given pixel is inside the given ellipse or not. ell is initialized && 0<=row<=imgDim-1 && 0<=col<=imgDim-1 . Parameters: ELLIPSE  *ell ellipse on which the testing is to be done. int  row row coordinate of a pixel. int  col column coordinate of a pixel. Returns: one if the given pixel is inside the given ellipse zero otherwise, some negative value if ERROR.

int ellipseReadEllipse (  FILE *  fp, ELLIPSE *  ell )

Reads one ellipse from the given file to the given ELLIPSE structure. A coordinate file contains the parameters of the ellipses in one line in the following order: Coordinate 1: v the additive intensity value of the ellipse Coordinate 2: a the length of the horizontal semi-axis of the ellipse Coordinate 3: b the length of the vertical semi-axis of the ellipse Coordinate 4: x the x-coordinate of the center of the ellipse Coordinate 5: y the y-coordinate of the center of the ellipse Coordinate 6: p the angle (in degrees) between the horizontal semi-axis of the ellipse and the x-axis of the image Coordinate 7: d the image dimension *fp is a pointer to open file containing ellipse(s) in correct format. *ell is initialized an ellipse is read from the file fname. Parameters: FILE  *fp a pointer to open file containing ellipse(s). ELLIPSE  *ell pointer to ELLIPSE structure where the read ellipse is to be set. Returns: 0 if ok 1 if there were no more ellipses.

int ellipseSaveEllipse (  ELLIPSE *  ell, FILE *  fp )

Adds the given ellipse to the file. *ell is initialized. ellipse is saved in the file called fname. Parameters: ELLIPSE  *ell pointer to the ellipse to be saved. FILE  *fp open file for saving. Returns: 0 if OK.

int ellipseSetFromParams (  ELLIPSE *  ell, int  imgDim, float *  semis, float *  cent, float  incli, float  val )

Sets the ellipse according to given coordinates and image dimension. Notice that the origin is in the middle. *ell is initialized. imgDim is positive. semis[i] are positive. -imgDim/2<=cent[i]<=imgDim/2. ellipse is set. Parameters: ELLIPSE  *ell pointer to ellipse for which the setting is to be done. int  imgDim size of the image plane. float  *semis major and minor semiaxis of the ellipse. float  *cent center of the ellipse. float  incli inclination of the ellipse. float  value value inside the ellipse. Returns: 0 if ok.

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