threshold
Threshold; void threshold (Threshold *tr, PixelRegion *srcPR, PixelRegion *destPR);
typedef struct { gboolean color; gint low_threshold; gint high_threshold; } Threshold;
void threshold (Threshold *tr, PixelRegion *srcPR, PixelRegion *destPR);
tr :
tr
srcPR :
srcPR
destPR :
destPR