gaussian_conv_vyv.h

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#ifndef _GAUSSIAN_CONV_VYV_H_
#define _GAUSSIAN_CONV_VYV_H_

#include "num.h"

#define VYV_MIN_K       3

#define VYV_MAX_K       5

#define VYV_VALID_K(K)  (VYV_MIN_K <= (K) && (K) <= VYV_MAX_K)

typedef struct vyv_coeffs_
{
    num filter[VYV_MAX_K + 1];     
    num M[VYV_MAX_K * VYV_MAX_K];  
    num sigma;                     
    num tol;                       
    int K;                         
    long max_iter;                 
} vyv_coeffs;

void vyv_precomp(vyv_coeffs *c, double sigma, int K, num tol);
void vyv_gaussian_conv(vyv_coeffs c,
    num *dest, const num *src, long N, long stride);
void vyv_gaussian_conv_image(vyv_coeffs c, num *dest, const num *src,
    int width, int height, int num_channels);

#endif /* _GAUSSIAN_CONV_VYV_H_ */