Related Functions

Related functions for Simd::Pyramid structure. More...

Functions
template<template< class > class A>
SIMD_INLINE void	Fill (Pyramid< A > &pyramid, uint8_t value)
	Fills every level of a pyramid with the given 8-bit value. More...
template<template< class > class A>
SIMD_INLINE void	Copy (const Pyramid< A > &src, Pyramid< A > &dst)
	Copies one pyramid to another pyramid. More...
template<template< class > class A>
SIMD_INLINE void	Build (Pyramid< A > &pyramid, ::SimdReduceType reduceType, bool compensation=true)
	Builds a gray image pyramid by filling upper levels from the lowest level. More...
Point< ptrdiff_t >	Scale (Point< ptrdiff_t > size, int scale=2)
	Scales size of an image. More...

Detailed Description

Related functions for Simd::Pyramid structure.

Function Documentation

Fill()

void Fill	(	Pyramid< A > &	pyramid,
		uint8_t	value
	)

Fills every level of a pyramid with the given 8-bit value.

For each pyramid level the function calls Simd::Fill, which writes value into every byte of image pixel data of that level. Row padding after width*pixelSize is not modified.

Parameters

[out]	pyramid	- a pyramid to fill.
[in]	value	- a byte value used to fill pixel data of every pyramid level.

Copy()

void Copy	(	const Pyramid< A > &	src,
		Pyramid< A > &	dst
	)

Copies one pyramid to another pyramid.

Note

Input and output pyramids must have the same size.

Parameters

[in]	src	- an input pyramid.
[out]	dst	- an output pyramid.

Build()

void Build	(	Pyramid< A > &	pyramid,
		::SimdReduceType	reduceType,
		bool	compensation = true
	)

Builds a gray image pyramid by filling upper levels from the lowest level.

Level 0 must already contain the source 8-bit gray image. For every next level the function calls Simd::ReduceGray so that level[i] is a half-size reduction of level[i - 1] (dst.width = (src.width + 1)/2, dst.height = (src.height + 1)/2). The reduceType argument selects the reducer: SimdReduce2x2, SimdReduce3x3, SimdReduce4x4 or SimdReduce5x5. The compensation flag is used only for SimdReduce3x3 and SimdReduce5x5.

Parameters

[in,out]	pyramid	- a pyramid; level 0 is an input image, levels 1..N-1 are outputs.
[in]	reduceType	- a type of function used for image reducing (see SimdReduceType).
[in]	compensation	- a flag to enable rounding compensation before division. It is relevant only for SimdReduce3x3 and SimdReduce5x5. It is equal to true by default.

Scale()

SIMD_INLINE Point< ptrdiff_t > Scale	(	Point< ptrdiff_t >	size,
		int	scale = 2
	)

Scales size of an image.

Note

This function is useful for Pyramid structure.

Parameters

[in]	size	- an original image size.
[in]	scale	- a scale. It must be a multiple of 2. By default it is equal to 2.

Returns

scaled size.