Functions for estimation of image histogram.
More...
|
SIMD_API void | SimdAbsSecondDerivativeHistogram (const uint8_t *src, size_t width, size_t height, size_t stride, size_t step, size_t indent, uint32_t *histogram) |
| Calculates histogram of second derivative for 8-bit gray image. More...
|
|
SIMD_API void | SimdHistogram (const uint8_t *src, size_t width, size_t height, size_t stride, uint32_t *histogram) |
| Calculates histogram for 8-bit gray image. More...
|
|
SIMD_API void | SimdHistogramMasked (const uint8_t *src, size_t srcStride, size_t width, size_t height, const uint8_t *mask, size_t maskStride, uint8_t index, uint32_t *histogram) |
| Calculates histogram for 8-bit gray image with using mask. More...
|
|
SIMD_API void | SimdHistogramConditional (const uint8_t *src, size_t srcStride, size_t width, size_t height, const uint8_t *mask, size_t maskStride, uint8_t value, SimdCompareType compareType, uint32_t *histogram) |
| Calculates histogram of 8-bit gray image for those points when mask points satisfying certain condition. More...
|
|
SIMD_API void | SimdNormalizeHistogram (const uint8_t *src, size_t srcStride, size_t width, size_t height, uint8_t *dst, size_t dstStride) |
| Normalizes histogram for 8-bit gray image. More...
|
|
template<template< class > class A> |
SIMD_INLINE void | AbsSecondDerivativeHistogram (const View< A > &src, size_t step, size_t indent, uint32_t *histogram) |
| Calculates histogram of second derivative for 8-bit gray image. More...
|
|
template<template< class > class A> |
SIMD_INLINE void | Histogram (const View< A > &src, uint32_t *histogram) |
| Calculates histogram for 8-bit gray image. More...
|
|
template<template< class > class A> |
SIMD_INLINE void | HistogramMasked (const View< A > &src, const View< A > &mask, uint8_t index, uint32_t *histogram) |
| Calculates histogram for 8-bit gray image with using mask. More...
|
|
template<template< class > class A> |
SIMD_INLINE void | HistogramConditional (const View< A > &src, const View< A > &mask, uint8_t value, SimdCompareType compareType, uint32_t *histogram) |
| Calculates histogram of 8-bit gray image for those points when mask points satisfying certain condition. More...
|
|
template<template< class > class A> |
SIMD_INLINE void | NormalizeHistogram (const View< A > &src, View< A > &dst) |
| Normalizes histogram for 8-bit gray image. More...
|
|
Functions for estimation of image histogram.
void SimdAbsSecondDerivativeHistogram |
( |
const uint8_t * |
src, |
|
|
size_t |
width, |
|
|
size_t |
height, |
|
|
size_t |
stride, |
|
|
size_t |
step, |
|
|
size_t |
indent, |
|
|
uint32_t * |
histogram |
|
) |
| |
Calculates histogram of second derivative for 8-bit gray image.
For all points except the boundary (defined by parameter indent): dx = abs(src[x, y] - average(src[x+step, y], src[x-step, y]));
dy = abs(src[x, y] - average(src[x, y+step], src[x, y-step]));
histogram[max(dx, dy)]++;
- Note
- This function has a C++ wrapper Simd::AbsSecondDerivativeHistogram(const View<A>& src, size_t step, size_t indent, uint32_t * histogram).
- Parameters
-
[in] | src | - a pointer to pixels data of input 8-bit gray image. |
[in] | width | - an image width. |
[in] | height | - an image height. |
[in] | stride | - a row size of the image. |
[in] | step | - a step for second derivative calculation. |
[in] | indent | - a indent from image boundary. |
[out] | histogram | - a pointer to histogram (array of 256 unsigned 32-bit values). |
void SimdHistogram |
( |
const uint8_t * |
src, |
|
|
size_t |
width, |
|
|
size_t |
height, |
|
|
size_t |
stride, |
|
|
uint32_t * |
histogram |
|
) |
| |
Calculates histogram for 8-bit gray image.
For all points: histogram[src[i]]++.
- Note
- This function has a C++ wrapper Simd::Histogram(const View<A>& src, uint32_t * histogram).
- Parameters
-
[in] | src | - a pointer to pixels data of input 8-bit gray image. |
[in] | width | - an image width. |
[in] | height | - an image height. |
[in] | stride | - a row size of the image. |
[out] | histogram | - a pointer to histogram (array of 256 unsigned 32-bit values). |
void SimdHistogramMasked |
( |
const uint8_t * |
src, |
|
|
size_t |
srcStride, |
|
|
size_t |
width, |
|
|
size_t |
height, |
|
|
const uint8_t * |
mask, |
|
|
size_t |
maskStride, |
|
|
uint8_t |
index, |
|
|
uint32_t * |
histogram |
|
) |
| |
Calculates histogram for 8-bit gray image with using mask.
For every point: if(mask[i] == index)
histogram[src[i]]++.
- Note
- This function has a C++ wrapper Simd::HistogramMasked(const View<A> & src, const View<A> & mask, uint8_t index, uint32_t * histogram).
- Parameters
-
[in] | src | - a pointer to pixels data of input 8-bit gray image. |
[in] | srcStride | - a row size of the image. |
[in] | width | - an image width. |
[in] | height | - an image height. |
[in] | mask | - a pointer to pixels data of the mask 8-bit image. |
[in] | maskStride | - a row size of the mask image. |
[in] | index | - a mask index. |
[out] | histogram | - a pointer to histogram (array of 256 unsigned 32-bit values). |
void SimdHistogramConditional |
( |
const uint8_t * |
src, |
|
|
size_t |
srcStride, |
|
|
size_t |
width, |
|
|
size_t |
height, |
|
|
const uint8_t * |
mask, |
|
|
size_t |
maskStride, |
|
|
uint8_t |
value, |
|
|
SimdCompareType |
compareType, |
|
|
uint32_t * |
histogram |
|
) |
| |
Calculates histogram of 8-bit gray image for those points when mask points satisfying certain condition.
For every point: if(compare(mask[x, y], value))
histogram[src[x, y]]++.
- Note
- This function has a C++ wrapper Simd::HistogramConditional(const View<A>& src, const View<A>& mask, uint8_t value, SimdCompareType compareType, uint32_t * histogram).
- Parameters
-
[in] | src | - a pointer to pixels data of input 8-bit gray image. |
[in] | srcStride | - a row size of the image. |
[in] | width | - an image width. |
[in] | height | - an image height. |
[in] | mask | - a pointer to pixels data of the mask 8-bit image. |
[in] | maskStride | - a row size of the mask image. |
[in] | value | - a second value for compare operation. |
[in] | compareType | - a compare operation type (see SimdCompareType). |
[out] | histogram | - a pointer to histogram (array of 256 unsigned 32-bit values). |
void SimdNormalizeHistogram |
( |
const uint8_t * |
src, |
|
|
size_t |
srcStride, |
|
|
size_t |
width, |
|
|
size_t |
height, |
|
|
uint8_t * |
dst, |
|
|
size_t |
dstStride |
|
) |
| |
Normalizes histogram for 8-bit gray image.
The input and output 8-bit gray images must have the same size.
- Note
- This function has a C++ wrapper Simd::NormalizeHistogram(const View<A> & src, View<A> & dst).
- Parameters
-
[in] | src | - a pointer to pixels data of input 8-bit gray image. |
[in] | srcStride | - a row size of the image. |
[in] | width | - an image width. |
[in] | height | - an image height. |
[out] | dst | - a pointer to pixels data of output 8-bit image with normalized histogram. |
[in] | dstStride | - a row size of the output image. |
void AbsSecondDerivativeHistogram |
( |
const View< A > & |
src, |
|
|
size_t |
step, |
|
|
size_t |
indent, |
|
|
uint32_t * |
histogram |
|
) |
| |
Calculates histogram of second derivative for 8-bit gray image.
For all points except the boundary (defined by parameter indent): dx = abs(src[x, y] - average(src[x+step, y], src[x-step, y]));
dy = abs(src[x, y] - average(src[x, y+step], src[x, y-step]));
histogram[max(dx, dy)]++;
- Note
- This function is a C++ wrapper for function SimdAbsSecondDerivativeHistogram.
- Parameters
-
[in] | src | - an input 8-bit gray image. |
[in] | step | - a step for second derivative calculation. |
[in] | indent | - a indent from image boundary. |
[out] | histogram | - a pointer to histogram (array of 256 unsigned 32-bit values). |
void Histogram |
( |
const View< A > & |
src, |
|
|
uint32_t * |
histogram |
|
) |
| |
Calculates histogram for 8-bit gray image.
For all points: histogram[src[i]]++.
- Note
- This function is a C++ wrapper for function SimdHistogram.
- Parameters
-
[in] | src | - an input 8-bit gray image. |
[out] | histogram | - a pointer to histogram (array of 256 unsigned 32-bit values). |
void HistogramMasked |
( |
const View< A > & |
src, |
|
|
const View< A > & |
mask, |
|
|
uint8_t |
index, |
|
|
uint32_t * |
histogram |
|
) |
| |
Calculates histogram for 8-bit gray image with using mask.
For every point: if(mask[i] == index)
histogram[src[i]]++.
- Note
- This function is a C++ wrapper for function SimdHistogramMasked.
- Parameters
-
[in] | src | - an input 8-bit gray image. |
[in] | mask | - a mask 8-bit image. |
[in] | index | - a mask index. |
[out] | histogram | - a pointer to histogram (array of 256 unsigned 32-bit values). |
void HistogramConditional |
( |
const View< A > & |
src, |
|
|
const View< A > & |
mask, |
|
|
uint8_t |
value, |
|
|
SimdCompareType |
compareType, |
|
|
uint32_t * |
histogram |
|
) |
| |
Calculates histogram of 8-bit gray image for those points when mask points satisfying certain condition.
For every point: if(compare(mask[x, y], value))
histogram[src[x, y]]++.
- Note
- This function is a C++ wrapper for function SimdHistogramConditional.
- Parameters
-
[in] | src | - an input 8-bit gray image. |
[in] | mask | - a mask 8-bit image. |
[in] | value | - a second value for compare operation. |
[in] | compareType | - a compare operation type (see SimdCompareType). |
[out] | histogram | - a pointer to histogram (array of 256 unsigned 32-bit values). |
void NormalizeHistogram |
( |
const View< A > & |
src, |
|
|
View< A > & |
dst |
|
) |
| |
Normalizes histogram for 8-bit gray image.
The input and output 8-bit gray images must have the same size.
- Note
- This function is a C++ wrapper for function SimdNormalizeHistogram.
- Parameters
-
[in] | src | - an input 8-bit gray image. |
[out] | dst | - an output 8-bit image with normalized histogram. |
|