#include "edge_common.h"
#include "edge_template.c"

Macros
#define	DEPTH 8

#define	DEPTH 16

#define	COPY_MAXIMA(ay, ax, by, bx)

Functions
static int	get_rounded_direction (int gx, int gy)

void	ff_non_maximum_suppression (int w, int h, uint8_t dst, int dst_linesize, const int8_t dir, int dir_linesize, const uint16_t *src, int src_linesize)
	Filters rounded gradients to drop all non-maxima pixels in the magnitude image Expects gradients generated by av_image_sobel() Expects zero's in the destination buffer dst.

void	ff_double_threshold (int low, int high, int w, int h, uint8_t dst, int dst_linesize, const uint8_t src, int src_linesize)
	Filters all pixels in src to keep all pixels > high, and keep all pixels > low where all surrounding pixels > high.

Macro Definition Documentation

◆ DEPTH [1/2]

#define DEPTH 8

Definition at line 50 of file edge_common.c.

◆ DEPTH [2/2]

#define DEPTH 16

Definition at line 50 of file edge_common.c.

◆ COPY_MAXIMA

#define COPY_MAXIMA	(	ay,
		ax,
		by,
		bx )

Value:

    do {                \
    if (src[i] > src[(ay)*src_linesize + i+(ax)] &&     \
        src[i] > src[(by)*src_linesize + i+(bx)])       \
        dst[i] = av_clip_uint8(src[i]);                 \
} while (0)

Referenced by ff_non_maximum_suppression().

Function Documentation

◆ get_rounded_direction()

static int get_rounded_direction	(	int	gx,
		int	gy )

static

Definition at line 22 of file edge_common.c.

Referenced by sobel().

◆ ff_non_maximum_suppression()

void ff_non_maximum_suppression	(	int	w,
		int	h,
		uint8_t *	dst,
		int	dst_linesize,
		const int8_t *	dir,
		int	dir_linesize,
		const uint16_t *	src,
		int	src_linesize )

Filters rounded gradients to drop all non-maxima pixels in the magnitude image Expects gradients generated by av_image_sobel() Expects zero's in the destination buffer dst.

Parameters

w	the width of the image in pixels
h	the height of the image in pixels
dst	data pointers to magnitude image
dst_linesize	linesizes for the magnitude image
dir	data pointers to direction image
dir_linesize	linesizes for the direction image
src	data pointers to source image
src_linesize	linesizes for the source image

Definition at line 60 of file edge_common.c.

Referenced by blurdetect_filter_frame(), filter_frame(), and filter_frame().

◆ ff_double_threshold()

void ff_double_threshold	(	int	low,
		int	high,
		int	w,
		int	h,
		uint8_t *	dst,
		int	dst_linesize,
		const uint8_t *	src,
		int	src_linesize )

Filters all pixels in src to keep all pixels > high, and keep all pixels > low where all surrounding pixels > high.