EdgeDetector.h

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/*
 * EdgeDetector
 *
 * Declare routines that are likely to be useful for any edge-detection
 * implementation.
 */
 
#ifndef EDGEDETECTOR_H
#define EDGEDETECTOR_H
 
using AVFrame = struct AVFrame;
 
namespace edgeDetector {
 
/* Pass all zeroes to not exclude any areas from examination. */
 
unsigned int *sgm_init_exclude(unsigned int *sgm,
        const AVFrame *src, int srcheight,
        int excluderow, int excludecol, int excludewidth, int excludeheight);
 
int edge_mark_uniform_exclude(AVFrame *dst, int dstheight, int extramargin,
        const unsigned int *sgm, unsigned int *sgmsorted, int percentile,
        int excluderow, int excludecol, int excludewidth, int excludeheight);
 
};  /* namespace */
 
class EdgeDetector
{
public:
    virtual ~EdgeDetector(void) = default;
 
    /* Exclude an area from edge detection. */
    virtual int setExcludeArea(int row, int col, int width, int height);
 
    /* Detect edges in "pgm" image. */
    virtual const AVFrame *detectEdges(const AVFrame *pgm, int pgmheight,
            int percentile) = 0;
};
 
#endif  /* !EDGEDETECTOR_H */
 
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