Sobel Statistic

Getting of statistic related with Sobel filters. More...

Functions
SIMD_API void	SimdSobelDxAbsSum (const uint8_t *src, size_t stride, size_t width, size_t height, uint64_t *sum)
	Calculates sum of absolute value of Sobel's filter along x axis. More...
SIMD_API void	SimdSobelDyAbsSum (const uint8_t *src, size_t stride, size_t width, size_t height, uint64_t *sum)
	Calculates sum of absolute value of Sobel's filter along y axis. More...
template<template< class > class A>
SIMD_INLINE void	SobelDxAbsSum (const View< A > &src, uint64_t &sum)
	Calculates sum of absolute value of Sobel's filter along x axis. More...
template<template< class > class A>
SIMD_INLINE void	SobelDyAbsSum (const View< A > &src, uint64_t &sum)
	Calculates sum of absolute value of Sobel's filter along y axis. More...

Detailed Description

Getting of statistic related with Sobel filters.

Function Documentation

SimdSobelDxAbsSum()

void SimdSobelDxAbsSum	(	const uint8_t *	src,
		size_t	stride,
		size_t	width,
		size_t	height,
		uint64_t *	sum
	)

Calculates sum of absolute value of Sobel's filter along x axis.

Input image must has 8-bit gray format.

For every point:

dst[x, y] = abs((src[x+1,y-1] + 2*src[x+1, y] + src[x+1, y+1]) - (src[x-1,y-1] + 2*src[x-1, y] + src[x-1, y+1])).

Note

This function has a C++ wrappers: Simd::SobelDxAbsSum(const View<A>& src, uint64_t & sum).

Parameters

[in]	src	- a pointer to pixels data of the input image.
[in]	stride	- a row size of the input image.
[in]	width	- an image width.
[in]	height	- an image height.
[out]	sum	- a pointer to unsigned 64-bit integer value with result sum.

SimdSobelDyAbsSum()

void SimdSobelDyAbsSum	(	const uint8_t *	src,
		size_t	stride,
		size_t	width,
		size_t	height,
		uint64_t *	sum
	)

Calculates sum of absolute value of Sobel's filter along y axis.

Input image must has 8-bit gray format.

For every point:

sum += abs((src[x-1,y+1] + 2*src[x, y+1] + src[x+1, y+1]) - (src[x-1,y-1] + 2*src[x, y-1] + src[x+1, y-1]));

Note

This function has a C++ wrappers: Simd::SobelDyAbsSum(const View<A>& src, uint64_t & sum).

Parameters

[in]	src	- a pointer to pixels data of the input image.
[in]	stride	- a row size of the input image.
[in]	width	- an image width.
[in]	height	- an image height.
[out]	sum	- a pointer to unsigned 64-bit integer value with result sum.

SobelDxAbsSum()

void SobelDxAbsSum	(	const View< A > &	src,
		uint64_t &	sum
	)

Calculates sum of absolute value of Sobel's filter along x axis.

Input image must has 8-bit gray format.

For every point:

sum += abs((src[x+1,y-1] + 2*src[x+1, y] + src[x+1, y+1]) - (src[x-1,y-1] + 2*src[x-1, y] + src[x-1, y+1]));

Note

This function is a C++ wrapper for function SimdSobelDxAbsSum.

Parameters

[in]	src	- an input image.
[out]	sum	- an unsigned 64-bit integer value with result sum.

SobelDyAbsSum()

void SobelDyAbsSum	(	const View< A > &	src,
		uint64_t &	sum
	)

Calculates sum of absolute value of Sobel's filter along y axis.

Input image must has 8-bit gray format.

For every point:

sum += abs((src[x-1,y+1] + 2*src[x, y+1] + src[x+1, y+1]) - (src[x-1,y-1] + 2*src[x, y-1] + src[x+1, y-1]));

Note

This function is a C++ wrapper for function SimdSobelDyAbsSum.

Parameters

[in]	src	- an input image.
[out]	sum	- an unsigned 64-bit integer value with result sum.