Estimation of image statistic for separate columns. More...
Functions | |
| SIMD_API void | SimdGetColSums (const uint8_t *src, size_t stride, size_t width, size_t height, uint32_t *sums) |
| Calculate sums of columns for given 8-bit gray image. More... | |
| SIMD_API void | SimdGetAbsDxColSums (const uint8_t *src, size_t stride, size_t width, size_t height, uint32_t *sums) |
| Calculate sums of absolute derivate along x axis for columns for given 8-bit gray image. More... | |
| template<template< class > class A> | |
| SIMD_INLINE void | GetColSums (const View< A > &src, uint32_t *sums) |
| Calculate sums of columns for given 8-bit gray image. More... | |
| template<template< class > class A> | |
| SIMD_INLINE void | GetAbsDxColSums (const View< A > &src, uint32_t *sums) |
| Calculate sums of absolute derivate along x axis for columns for given 8-bit gray image. More... | |
Detailed Description
Estimation of image statistic for separate columns.
Function Documentation
◆ SimdGetColSums()
| void SimdGetColSums | ( | const uint8_t * | src, |
| size_t | stride, | ||
| size_t | width, | ||
| size_t | height, | ||
| uint32_t * | sums | ||
| ) |
Calculate sums of columns for given 8-bit gray image.
For all columns:
for(y = 0; y < height; ++y)
sums[x] += src[x, y];
- Note
- This function has a C++ wrappers: Simd::GetColSums(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 columns. It length must be equal to image width.
◆ SimdGetAbsDxColSums()
| void SimdGetAbsDxColSums | ( | const uint8_t * | src, |
| size_t | stride, | ||
| size_t | width, | ||
| size_t | height, | ||
| uint32_t * | sums | ||
| ) |
Calculate sums of absolute derivate along x axis for columns for given 8-bit gray image.
For all columns except the last:
for(y = 0; y < height; ++y)
sums[y] += abs(src[x+1, y] - src[x, y]);
For the last column:
sums[width-1] = 0;
- Note
- This function has a C++ wrappers: Simd::GetAbsDxColSums(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 columns. It length must be equal to image width.
◆ GetColSums()
| void GetColSums | ( | const View< A > & | src, |
| uint32_t * | sums | ||
| ) |
Calculate sums of columns for given 8-bit gray image.
For all columns:
for(y = 0; y < height; ++y)
sums[x] += src[x, y];
- Note
- This function is a C++ wrapper for function SimdGetColSums.
- Parameters
-
[in] src - an input image. [out] sums - a pointer to array of unsigned 32-bit integers result sums of columns. It length must be equal to image width.
◆ GetAbsDxColSums()
| void GetAbsDxColSums | ( | const View< A > & | src, |
| uint32_t * | sums | ||
| ) |
Calculate sums of absolute derivate along x axis for columns for given 8-bit gray image.
For all columns except the last:
for(y = 0; y < height; ++y)
sums[y] += abs(src[x+1, y] - src[x, y]);
For the last column:
sums[width-1] = 0;
- Note
- This function is a C++ wrapper for function SimdGetAbsDxColSums.
- Parameters
-
[in] src - an input image. [out] sums - a pointer to array of unsigned 32-bit integers result columns. It length must be equal to image width.