Collaboration diagram for Bitonal images:

Typedefs
using	crn::ImageBW = Image< pixel::BW >
	Black and white image class. More...

Functions
Histogram	crn::LeftProfile (const ImageBW &img)
	Computes the left profile. More...

Histogram	crn::RightProfile (const ImageBW &img)
	Computes the right profile. More...

Histogram	crn::TopProfile (const ImageBW &img)
	Computes the top profile. More...

Histogram	crn::BottomProfile (const ImageBW &img)
	Computes the bottom profile. More...

Histogram	crn::HorizontalProjection (const ImageBW &img)
	Computes the horizontal projection. More...

Histogram	crn::VerticalProjection (const ImageBW &img)
	Computes the vertical projection. More...

Histogram	crn::VerticalSlantedProjection (const ImageBW &img, const Angle< Radian > &theta)
	Computes the vertical projection after rotation. More...

double	crn::MeanBlackRun (const ImageBW &img) noexcept
	Gets the mean horizontal black run. More...

double	crn::MeanWhiteRun (const ImageBW &img, int blackrun=-1) noexcept
	Gets the mean horizontal white run. More...

double	crn::MeanBlackVRun (const ImageBW &img) noexcept
	Gets the mean vertical black run. More...

size_t	crn::CountBlackPixels (const ImageBW &img) noexcept
	Returns the number of black pixels. More...

size_t	crn::CountWhitePixels (const ImageBW &img) noexcept
	Returns the number of white pixels. More...

size_t	crn::Regularize (ImageBW &img, size_t min_neighbors=0)
	Removes isolated pixels and smooths edges. More...

ImageIntGray	crn::DistanceTransform (const ImageBW &img, const MatrixInt &m1, const MatrixInt &m2)
	Creates an image containing the distance transform. More...

Detailed Description

Typedef Documentation

using crn::ImageBW = typedef Image<pixel::BW>

Black and white image class.

This class is for black and white images. Values in pixels' vector represent luminosity values.

Author: Yann LEYDIER

Date: August 2007

Version: 0.4

Definition at line 45 of file CRNImageFormats.h.

Function Documentation

Histogram crn::BottomProfile ( const ImageBW & img )

Computes the bottom profile.

Computes the bottom profile

Returns: an histogram containing the profile

Definition at line 557 of file CRNImageBW.cpp.

size_t crn::CountBlackPixels ( const ImageBW & img )

noexcept

Returns the number of black pixels.

Parameters

[in] img the source image Returns the number of black pixels

Definition at line 764 of file CRNImageBW.cpp.

size_t crn::CountWhitePixels ( const ImageBW & img )

noexcept

Returns the number of white pixels.

Parameters

[in] img the source image Returns the number of white pixels

Definition at line 778 of file CRNImageBW.cpp.

ImageIntGray crn::DistanceTransform	(	const ImageBW &	img,
		const MatrixInt &	m1,
		const MatrixInt &	m2
	)

Creates an image containing the distance transform.

Creates an image containing the distance transform

Exceptions

ExceptionDimension	matrices are of different sizes
ExceptionInvalidArgument	matrices have even size

Parameters

[in]	img	the source image
[in]	m1	1st pass matrix. Negative numbers are ignored.
[in]	m2	2nd pass matrix. Negative numbers are ignored.

Returns: a new image containing the distance transform

Definition at line 852 of file CRNImageBW.cpp.

Histogram crn::HorizontalProjection ( const ImageBW & img )

Computes the horizontal projection.

Computes the horizontal projection

Returns: an histogram containing the projection

Definition at line 574 of file CRNImageBW.cpp.

Histogram crn::LeftProfile ( const ImageBW & img )

Computes the left profile.

Computes the left profile

Returns: an histogram containing the profile

Definition at line 506 of file CRNImageBW.cpp.

double crn::MeanBlackRun ( const ImageBW & img )

noexcept

Gets the mean horizontal black run.

Gets the mean horizontal black run

Parameters

[in] img the source image

Returns: The mean black run

Definition at line 659 of file CRNImageBW.cpp.

double crn::MeanBlackVRun ( const ImageBW & img )

noexcept

Gets the mean vertical black run.

Gets the mean vertical black run

Parameters

[in] img the source image

Returns: The mean black run

Definition at line 728 of file CRNImageBW.cpp.

double crn::MeanWhiteRun	(	const ImageBW &	img,
		int	blackrun = `-1`
	)

noexcept

Gets the mean horizontal white run.

Gets the mean horizontal white run. This functions uses the mean black run in order to filter the page runs and only keep the intra-word runs.

Parameters

[in]	img	the source image
[in]	blackrun	The mean black run. If -1, then computes it. default = -1.

Returns: The mean white run

Definition at line 690 of file CRNImageBW.cpp.

size_t crn::Regularize	(	ImageBW &	img,
		size_t	min_neighbors = `0`
	)

Removes isolated pixels and smooths edges.

Removes isolated pixels

Exceptions

ExceptionDomain min_neighbors size is greater or equal to 8

Parameters

[in]	img	the image to modify
[in]	min_neighbors	if (#black neighbors <= parameter) then remove black pixel

Returns: the number of deleted pixels

Definition at line 797 of file CRNImageBW.cpp.

Histogram crn::RightProfile ( const ImageBW & img )

Computes the right profile.

Computes the right profile

Returns: an histogram containing the profile

Definition at line 523 of file CRNImageBW.cpp.

Histogram crn::TopProfile ( const ImageBW & img )

Computes the top profile.

Computes the top profile

Returns: an histogram containing the profile

Definition at line 540 of file CRNImageBW.cpp.

Histogram crn::VerticalProjection ( const ImageBW & img )

Computes the vertical projection.

Computes the vertical projection

Returns: an histogram containing the projection

Definition at line 591 of file CRNImageBW.cpp.

Histogram crn::VerticalSlantedProjection	(	const ImageBW &	img,
		const Angle< Radian > &	theta
	)

Computes the vertical projection after rotation.

Computes the vertical projection after rotation

Returns: an histogram containing the projection

Definition at line 608 of file CRNImageBW.cpp.

Typedefs

Functions

Detailed Description

Typedef Documentation

Function Documentation