#define PIXELMINVALUE	0
#define PIXELMAXVALUE	255

#define ELEMENT(array,sw,sh,i,j)	array[(i)*sh+(j)]

/*	画像のファイル入出力	*/
extern int pgmFileWrite(FILE *, int, int, int, unsigned char *);
extern int pgmFileRead(FILE *, int *, int *, int *, unsigned char *);

extern int imageWrite(FILE *, int, int, int, int, int, int, int, int, double *);
extern int imageRead(FILE *, int *, int *, int, int, int, int, int, int, double *);

/*	フィルタ	*/
extern void imageLinearScaling(int, int, int, int, double *, double *);
extern void imageAverageFilter3(int, int, int, int, double *, double *);
extern void imageSobelFilter3(int, int, int, int, double *, double *);
extern void imageLaplacianFilter3(int, int, int, int, double *, double *);

extern double pixelvalue(double *, int, int, int, int, int, int, double, double, double, double);
extern void imageTranslation(int, int, int, int, int, int, double, double, double *, double, double, double *);
extern void imageRotation(int, int, int, int, int, int, double, double, double *, double, double, double *);
extern void imageExpansion(int, int, int, int, int, int, double, double, double *, double, double *);

#define DEG_TO_RAD	((2.00*M_PI)/360)
#define RAD_TO_DEG	(360/(2.00*M_PI))