#ifndef STIF_H #define STIF_H extern float stif_mean(unsigned char *channel, int size); extern float stif_lmean(unsigned char *channel, int width, int height, int i, int j, int half_width); extern float stif_variance(unsigned char *channel, int size); extern float stif_lvariance(unsigned char *channel, int width, int height, int i, int j, int half_width); extern float stif_entropy(unsigned char *channel, int size); extern float stif_lentropy(unsigned char *channel, int width, int height, int i, int j, int half_width); extern int stif_median(unsigned char *channel, int size); extern int stif_lmedian(unsigned char *channel, int width, int height, int i, int j, int half_width); #endif /* STIF_H */