Simd Library Documentation.

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Rows Statistic

Estimation of image statistic for separate rows. More...

Functions

SIMD_API void SimdGetRowSums (const uint8_t *src, size_t stride, size_t width, size_t height, uint32_t *sums)
 Calculate sums of rows for given 8-bit gray image. More...
 
SIMD_API void SimdGetAbsDyRowSums (const uint8_t *src, size_t stride, size_t width, size_t height, uint32_t *sums)
 Calculate sums of absolute derivate along y axis for rows for given 8-bit gray image. More...
 
template<template< class > class A>
SIMD_INLINE void GetRowSums (const View< A > &src, uint32_t *sums)
 Calculate sums of rows for given 8-bit gray image. More...
 
template<template< class > class A>
SIMD_INLINE void GetAbsDyRowSums (const View< A > &src, uint32_t *sums)
 Calculate sums of absolute derivate along y axis for rows for given 8-bit gray image. More...
 

Detailed Description

Estimation of image statistic for separate rows.

Function Documentation

◆ SimdGetRowSums()

void SimdGetRowSums ( const uint8_t *  src,
size_t  stride,
size_t  width,
size_t  height,
uint32_t *  sums 
)

Calculate sums of rows for given 8-bit gray image.

For all rows:

for(x = 0; x < width; ++x)
    sums[y] += src[x, y]; 
Note
This function has a C++ wrappers: Simd::GetRowSums(const View<A>& src, uint32_t * sums).
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]sums- a pointer to array of unsigned 32-bit integers result sums of rows. It length must be equal to image height.

◆ SimdGetAbsDyRowSums()

void SimdGetAbsDyRowSums ( const uint8_t *  src,
size_t  stride,
size_t  width,
size_t  height,
uint32_t *  sums 
)

Calculate sums of absolute derivate along y axis for rows for given 8-bit gray image.

For all rows except the last:

for(x = 0; x < width; ++x)
    sums[y] += abs(src[x, y+1] - src[x, y]); 

For the last row:

sums[height-1] = 0; 
Note
This function has a C++ wrappers: Simd::GetAbsDyRowSums(const View<A>& src, uint32_t * sums).
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]sums- a pointer to array of unsigned 32-bit integers result sums. It length must be equal to image height.

◆ GetRowSums()

void GetRowSums ( const View< A > &  src,
uint32_t *  sums 
)

Calculate sums of rows for given 8-bit gray image.

For all rows:

for(x = 0; x < width; ++x)
    sums[y] += src[x, y]; 
Note
This function is a C++ wrapper for function SimdGetRowSums.
Parameters
[in]src- an input image.
[out]sums- a pointer to array of unsigned 32-bit integers result sums of rows. It length must be equal to image height.

◆ GetAbsDyRowSums()

void GetAbsDyRowSums ( const View< A > &  src,
uint32_t *  sums 
)

Calculate sums of absolute derivate along y axis for rows for given 8-bit gray image.

For all rows except the last:

for(x = 0; x < width; ++x)
    sums[y] += abs(src[x, y+1] - src[x, y]); 

For the last row:

sums[height-1] = 0; 
Note
This function is a C++ wrapper for function SimdGetAbsDyRowSums.
Parameters
[in]src- an input image.
[out]sums- a pointer to array of unsigned 32-bit integers result sums. It length must be equal to image height.