#include <Image.h>

Collaboration diagram for Image:

Classes
class	ImageResampler
	Image resampler for DPI-change operations, including upsampling and downsampling. More...
class	BicubicImageResampler
	Image resampler for DPI-change operations, including upsampling and downsampling using bicubic interpolation resampling algorithm. More...
class	AreaImageResampler
	Image resampler for DPI-change operations, including upsampling and downsampling using area interpolation resampling algorithm. More...
class	NISTImageResampler
	Image resampler for DPI-change operations, including upsampling and downsampling using NIST-compliant resampling algorithm provided by NFIR library. More...

Public Types
enum class	Intersection : uint8_t { PARTIAL , INSIDE , OUTSIDE , NO , SAME }
	Enum define possible intersection of Image and some Object e.g. Rectangle, Circle. More...

Public Member Functions
Intersection	RectangleIntersection (const Rectangle &rectangle) const
	Check intersection between rectangle and image.
Intersection	CircleIntersection (const Circle &circle) const
	Check intersection between circle and image.
Intersection	PointIntersection (const Point &point) const
	Checks intersection between point and image.
ImageDpi	Dpi () const
	Returns image dpi.
ImageWidth	Width () const
	Returns image width.
ImageHeight	Height () const
	Returns image height.
std::shared_ptr< ImageEncoder >	OriginalEncoder () const
	Provides original encoder to encode image to original format.
RawImage	AsRawImage () const
	Converts image to RAW format that has been originally used.
RawImage	AsRawGrayscale () const
	Converts image to raw grayscale format.
RawImage	AsRawBGR () const
	Converts image to raw BGR format.
std::shared_ptr< Image >	AsBGR () const
	Converts image to BGR format.
RawImage	AsRawBGRA () const
	Converts image to raw BGRA format.
std::shared_ptr< Image >	AsBGRA () const
	Converts image to BGRA format.
std::vector< uint8_t >	EncodeIn (ImageEncoder &encoder) const
	Encode image in given ImageEncoder.
void	SaveIn (ImageSaver &saver) const
	Save Image in given ImageSaver.
void	SaveAs (const std::string &path) const
	Save Image in given path.
bool	operator== (const Image &right) const
	Images are equal when has same dimensions and same content.
std::shared_ptr< Image >	DrawShape (const ImageShape &shape) const
	Draws shape to new image.
std::shared_ptr< Image >	CropRectangle (const Rectangle &r) const
	Crops a rectangle from the image, using a white background for any extra space.
std::shared_ptr< Image >	CropRectangle (const Rectangle &r, const RGBA &background) const
	Crops a rectangle from the image, using a white background for any extra space.
std::shared_ptr< Image >	CropRectangle (const Rectangle &r, const RGBA &background, const ImageDimensions &dimension) const
	Crops a rectangle and places it on a canvas of specified dimensions, using a specified background color.
std::shared_ptr< Image >	ChangeDpiTo (const ImageResampler &resampler) const
	Create image using provided DPI-change configuration.
std::shared_ptr< Image >	ChangeDpiTo (ImageDpi targetDpi) const
	Create image with given DPI.
std::shared_ptr< Image >	Resize (float factor) const
	Resize image to new image.
std::shared_ptr< Image >	ResizeToMaxDimension (ImageDimension maxDimension) const
	Resize image to new image with given max dimension.
std::shared_ptr< Image >	CropAlignedRectangle (const Rectangle &r) const
	Crop rectangle and align given top left rectangle point to coordinates [0,0] in new image.
std::shared_ptr< Image >	CropAlignedRectangle (const Rectangle &r, const RGBA &background) const
	Crop rectangle and align given top left rectangle point to coordinates [0,0] in new image.
std::shared_ptr< Image >	CropAlignedRectangle (const Rectangle &r, const RGBA &background, const ImageDimensions &dimension) const
	Crop rectangle and align given top left rectangle point to coordinates [0,0] in new image.
std::shared_ptr< Image >	CropCircle (const Circle &circle, const RGBA &background=Colors::White) const
	Copy circle to new image.
std::shared_ptr< Image >	MaskImageBy (const ImageMask &mask) const
	Applies the specified mask to the image, creating a new masked image.
size_t	Channels () const
	Returns the number of channels in the image.

Static Public Member Functions
static std::shared_ptr< Image >	Decode (const std::vector< uint8_t > &imageData)
	Creates Image from image data with 500 DPI.
static std::shared_ptr< Image >	Decode (const std::vector< uint8_t > &imageData, unsigned int dpi)
	Creates Image from image data with given dpi.
static std::shared_ptr< Image >	Decode (const std::vector< uint8_t > &imageData, std::shared_ptr< ImageExecutor > executor)
	Creates Image from image data with 500 DPI.
static std::shared_ptr< Image >	Decode (const std::vector< uint8_t > &imageData, unsigned int dpi, std::shared_ptr< ImageExecutor > executor)
	Creates Image from image data with given DPI.
static std::shared_ptr< Image >	DecodeRawImage (const RawImage &raw, std::shared_ptr< ImageEncoder > originalEncoder=nullptr, std::shared_ptr< ImageExecutor > executor=GlobalImageExecutor::Get())
	Creates Image from raw data.
static ImageType	DeduceType (const std::vector< uint8_t > &imageData)
	Deduce image type from image content.

Detailed Description

Image representation.

Member Enumeration Documentation

◆ Intersection

enum class Intersection : uint8_t

strong

Enum define possible intersection of Image and some Object e.g. Rectangle, Circle.

Enumerator
PARTIAL	The Object and Image has intersection. Partial intersection
INSIDE	Object is fully in Image. Inside intersection
OUTSIDE	Image is fully in Object. Outside intersection
NO	Image and Object has no intersection. No intersection
SAME	Image has same dimensions and vertices coordinates as Object. Same intersection

Member Function Documentation

◆ AsBGR()

std::shared_ptr< Image > AsBGR ( ) const

inlinenodiscard

Converts image to BGR format.

Returns: Image.

Exceptions

ImageException when there is an processing error

References AsRawBGR(), and DecodeRawImage().

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◆ AsBGRA()

std::shared_ptr< Image > AsBGRA ( ) const

inlinenodiscard

Converts image to BGRA format.

Returns: Image.

Exceptions

ImageException when there is an processing error

References AsRawBGRA(), and DecodeRawImage().

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◆ AsRawBGR()

RawImage AsRawBGR ( ) const

inlinenodiscard

Converts image to raw BGR format.

Returns: RawImage.

Exceptions

ImageException when there is an processing error

References RawImage::BGR, Dpi(), Height(), and Width().

Referenced by AsBGR().

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◆ AsRawBGRA()

RawImage AsRawBGRA ( ) const

inlinenodiscard

Converts image to raw BGRA format.

Returns: RawImage.

Exceptions

ImageException when there is an processing error

References RawImage::BGRA, Dpi(), Height(), and Width().

Referenced by AsBGRA().

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◆ AsRawGrayscale()

RawImage AsRawGrayscale ( ) const

inlinenodiscard

Converts image to raw grayscale format.

Returns: RawImage.

Exceptions

ImageException when there is an processing error

References Dpi(), RawImage::GRAYSCALE, Height(), and Width().

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◆ AsRawImage()

RawImage AsRawImage ( ) const

inlinenodiscard

Converts image to RAW format that has been originally used.

Returns: RawImage.

Exceptions

ImageException when there is an processing error

References Dpi(), Height(), and Width().

Referenced by EncodeIn(), operator==(), SaveAs(), and SaveIn().

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◆ ChangeDpiTo() [1/2]

std::shared_ptr< Image > ChangeDpiTo ( const ImageResampler & resampler ) const

inlinenodiscard

Create image using provided DPI-change configuration.

It creates new image as result of resizing this image using a customized resizing strategy with factor targetDpi/originalDPI.

Parameters

resampler image resampler

Returns: image with given DPI

Exceptions

ImageException	when there is an processing error
EnrollmentInvalidArgumentException	when resize algorithm is NIST and image is not single-channel grayscale

References Image::ImageResampler::Resample().

Referenced by ChangeDpiTo().

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◆ ChangeDpiTo() [2/2]

std::shared_ptr< Image > ChangeDpiTo ( ImageDpi targetDpi ) const

inlinenodiscard

Create image with given DPI.

It creates new image as result of resizing this image with factor newDPI/originalDPI. The function uses Standard resizing algorithm. See BicubicImageResampler.

Parameters

targetDpi DPI of new image.

Returns: image with given DPI

Exceptions

ImageException	when there is an processing error
EnrollmentInvalidArgumentException	when targetDpi is 0

References ChangeDpiTo().

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◆ Channels()

size_t Channels ( ) const

inlinenodiscard

Returns the number of channels in the image.

A value of 1 typically represents a grayscale image.
A value of 3 typically represents a color image (e.g., RGB).
A value of 4 typically represents a color image with transparency (e.g., RGBA).

Returns: The number of channels in the image.

◆ CircleIntersection()

Intersection CircleIntersection ( const Circle & circle ) const

inlinenodiscard

Check intersection between circle and image.

Parameters

circle Circle

Returns: Image::Intersection type

Exceptions

ImageException when there is an processing error

References Circle::center, Circle::radius, Point::x, and Point::y.

Referenced by CropCircle().

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◆ CropAlignedRectangle() [1/3]

std::shared_ptr< Image > CropAlignedRectangle ( const Rectangle & r ) const

inlinenodiscard

Crop rectangle and align given top left rectangle point to coordinates [0,0] in new image.

For background outside image it will use Color::White. The dimensions of the output image will be equal to those of the rectangle.

See Description with examples.

Parameters

r Rectangle

Returns: copied and aligned Image

Exceptions

ImageException when there is an processing error

References CropAlignedRectangle().

Referenced by CropAlignedRectangle(), and CropAlignedRectangle().

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◆ CropAlignedRectangle() [2/3]

std::shared_ptr< Image > CropAlignedRectangle	(	const Rectangle &	r,
		const RGBA &	background ) const

inlinenodiscard

Crop rectangle and align given top left rectangle point to coordinates [0,0] in new image.

The function will utilize the provided color for the background outside the image. The dimensions of the output image will be equal to those of the rectangle.

See Description with examples.

Parameters

r	Rectangle
background	color of background when rectangle is out of image

Returns: copied and aligned Image

Exceptions

ImageException when there is an processing error

References CropAlignedRectangle().

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◆ CropAlignedRectangle() [3/3]

std::shared_ptr< Image > CropAlignedRectangle	(	const Rectangle &	r,
		const RGBA &	background,
		const ImageDimensions &	dimension ) const

inlinenodiscard

Crop rectangle and align given top left rectangle point to coordinates [0,0] in new image.

The function will render an image using specified dimensions, incorporating a cropped aligned rectangle within. For areas outside the cropped rectangle, the specified background color will be applied. If the dimensions of the cropped rectangle differ from those of the output image, the function will center the cropped rectangle within the output image. Any additional space in the output image, resulting from a size discrepancy with the cropped rectangle, will be filled with the chosen background color.

See Description with examples.

Parameters

r	Rectangle
background	color of background when rectangle is out of image
dimension	requested dimension of new image.

Returns: copied and aligned Image

Exceptions

ImageException when there is an processing error

References RGB::blue, RGBA::color, Rectangle::GetBottomLeft(), Rectangle::GetBottomRight(), Rectangle::GetHeight(), Rectangle::GetTopLeft(), Rectangle::GetTopRight(), Rectangle::GetWidth(), RGB::green, ImageDimensions::height, RGB::red, RGBA::transparency, ImageDimensions::width, Point::x, and Point::y.

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◆ CropCircle()

std::shared_ptr< Image > CropCircle	(	const Circle &	circle,
		const RGBA &	background = Colors::White ) const

inlinenodiscard

Copy circle to new image.

See Description with examples.

Parameters

circle	circle to cut.
background	color of background around circle

Returns: copied Image

Exceptions

EnrollmentInvalidArgumentException	when given circle and image has no intersection
ImageException	when there is an processing error

References Circle::center, CircleIntersection(), NO, Circle::radius, Point::x, and Point::y.

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◆ CropRectangle() [1/3]

std::shared_ptr< Image > CropRectangle ( const Rectangle & r ) const

inlinenodiscard

Crops a rectangle from the image, using a white background for any extra space.

This method crops a rectangle from the image. If the rectangle extends beyond the image boundaries, the additional space is filled with a white background. The size of the resulting image matches the dimensions of the specified rectangle.

See Description with examples.

Parameters

r	Rectangle defining the area to crop.

Returns: A cropped image

Exceptions

EnrollmentInvalidArgumentException	if the rectangle does not intersect with the image.
ImageException	when there is an processing error

References CropRectangle().

Referenced by CropRectangle(), and CropRectangle().

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◆ CropRectangle() [2/3]

std::shared_ptr< Image > CropRectangle	(	const Rectangle &	r,
		const RGBA &	background ) const

inlinenodiscard

Crops a rectangle from the image, using a white background for any extra space.

This method crops a rectangle from the image. If the rectangle extends beyond the image boundaries, the additional space is filled with a specified background. The size of the resulting image matches the dimensions of the specified rectangle.

See Description with examples.

Parameters

r	Rectangle defining the area to crop.
background	Color for the background surrounding the rectangle.

Returns: A cropped image.

Exceptions

EnrollmentInvalidArgumentException if the rectangle does not intersect with the image.

References CropRectangle().

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◆ CropRectangle() [3/3]

std::shared_ptr< Image > CropRectangle	(	const Rectangle &	r,
		const RGBA &	background,
		const ImageDimensions &	dimension ) const

inlinenodiscard

Crops a rectangle and places it on a canvas of specified dimensions, using a specified background color.

This function crops a rectangle and centers it on a new canvas with the specified dimensions. If the new canvas is larger than the cropped rectangle, the extra space is filled with the specified background color. If the rectangle is larger than the original image, the background color fills the extra space.

See Description with examples.

Parameters

r	Rectangle defining the area to crop.
background	Color for the background.
dimension	Dimensions of the new canvas. If width or height is 0, dimensions are set based on the rectangle.

Returns: A cropped image on a new canvas.

Exceptions

EnrollmentInvalidArgumentException if the rectangle does not intersect with the image.

References RGB::blue, RGBA::color, Rectangle::GetBottomLeft(), Rectangle::GetBottomRight(), Rectangle::GetTopLeft(), Rectangle::GetTopRight(), RGB::green, ImageDimensions::height, NO, RectangleIntersection(), RGB::red, RGBA::transparency, ImageDimensions::width, Point::x, and Point::y.

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◆ Decode() [1/4]

std::shared_ptr< Image > Decode ( const std::vector< uint8_t > & imageData )

inlinestatic

Creates Image from image data with 500 DPI.

See Description with examples. It uses default dpi (500). It uses GlobalImageExecutor for execution of image functionality.

Parameters

imageData image content

Returns: Image object of this class

Exceptions

ImageException	when type is not supported or image data are corrupted
NullArgumentException	when executor is null

References Decode(), DefaultDpi, and GlobalImageExecutor::Get().

Referenced by Decode(), Decode(), Decode(), FaceCapture::FromIsoImage(), IrisCapture::FromIsoImage(), and Print::FromIsoImage().

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◆ Decode() [2/4]

std::shared_ptr< Image > Decode	(	const std::vector< uint8_t > &	imageData,
		std::shared_ptr< ImageExecutor >	executor )

inlinestatic

Creates Image from image data with 500 DPI.

See Description with examples. It uses default dpi (500).

Parameters

imageData	image content
executor	image functionality executor (the execution strategy)

Returns: Image object of this class

Exceptions

ImageException	when type is not supported or image data are corrupted
NullArgumentException	when executor is null

References Decode(), and DefaultDpi.

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◆ Decode() [3/4]

std::shared_ptr< Image > Decode	(	const std::vector< uint8_t > &	imageData,
		unsigned int	dpi )

inlinestatic

Creates Image from image data with given dpi.

See Description with examples. It uses GlobalImageExecutor for execution of image functionality.

Parameters

imageData	image content
dpi	dpi of image

Returns: Image object of this class

Exceptions

ImageException	when type is not supported or image data are corrupted
NullArgumentException	when executor is null

References Decode(), and GlobalImageExecutor::Get().

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◆ Decode() [4/4]

std::shared_ptr< Image > Decode	(	const std::vector< uint8_t > &	imageData,
		unsigned int	dpi,
		std::shared_ptr< ImageExecutor >	executor )

inlinestatic

Creates Image from image data with given DPI.

See Description with examples.

Parameters

imageData	image content
dpi	dpi of image
executor	image functionality executor (the execution strategy)

Returns: Image object of this class

Exceptions

ImageException	when type is not supported or image data are corrupted
NullArgumentException	when executor is null

References ImageEncoder::Create(), ImageException::DECODE_IMAGE, and DeduceType().

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◆ DecodeRawImage()

std::shared_ptr< Image > DecodeRawImage	(	const RawImage &	raw,
		std::shared_ptr< ImageEncoder >	originalEncoder = nullptr,
		std::shared_ptr< ImageExecutor >	executor = GlobalImageExecutor::Get() )

inlinestatic

Creates Image from raw data.

See Description with examples.

Parameters

raw	RawImage
originalEncoder	original encoder
executor	image functionality executor (the execution strategy)

Returns: Image object of this class

Exceptions

ImageException when type is not supported or image data are corrupted

References RawImage::Data(), RawImage::dpi, GlobalImageExecutor::Get(), RawImage::height, RawImage::type, and RawImage::width.

Referenced by AsBGR(), AsBGRA(), CroppedFace::FaceAreaMask(), CroppedFace::FaceAreaSegment(), CroppedFace::FaceAreaSegment(), IrisCapture::FromIsoImage(), Print::FromIsoImage(), and CroppedFace::GetFaceCapture().

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◆ DeduceType()

ImageType DeduceType ( const std::vector< uint8_t > & imageData )

inlinestatic

Deduce image type from image content.

Parameters

imageData image content

Returns: ImageType image type

Exceptions

ImageException	when image type is unknown
ImageException	when there is an processing error

Referenced by Decode().

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◆ Dpi()

ImageDpi Dpi ( ) const

inlinenodiscard

Returns image dpi.

Returns: ImageDpi

Referenced by AsRawBGR(), AsRawBGRA(), AsRawGrayscale(), and AsRawImage().

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◆ DrawShape()

std::shared_ptr< Image > DrawShape ( const ImageShape & shape ) const

inlinenodiscard

Draws shape to new image.

See Description with examples.

Parameters

shape ImageShape

Returns: Image image with drown shape

Exceptions

ImageException when there is an processing error

References ImageShape::DrawIn().

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◆ EncodeIn()

std::vector< uint8_t > EncodeIn ( ImageEncoder & encoder ) const

inlinenodiscard

Encode image in given ImageEncoder.

Parameters

encoder specific ImageEncoder

Returns: encoded image

Exceptions

ImageException	when ImageEncoder throws
ImageException	when it is not possible convert image to raw data

References AsRawImage(), and ImageEncoder::Encode().

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◆ Height()

ImageHeight Height ( ) const

inlinenodiscard

Returns image height.

Returns: ImageHeight

Referenced by AsRawBGR(), AsRawBGRA(), AsRawGrayscale(), AsRawImage(), and ResizeToMaxDimension().

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◆ MaskImageBy()

std::shared_ptr< Image > MaskImageBy ( const ImageMask & mask ) const

inlinenodiscard

Applies the specified mask to the image, creating a new masked image.

Parameters

mask	The ImageMask to apply to the current image. This mask defines the areas of the image to be modified or preserved according to the mask's specific logic.

Returns: New image instance that represents the result of applying the mask to the current image.

References ImageMask::MaskWith().

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◆ operator==()

bool operator== ( const Image & right ) const

inline

Images are equal when has same dimensions and same content.

Parameters

right right image in comparison

Returns: true - images have same dimensions and content; false - images have different dimensions or content

Exceptions

ImageException when there is an processing error

References AsRawImage().

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◆ OriginalEncoder()

std::shared_ptr< ImageEncoder > OriginalEncoder ( ) const

inlinenodiscard

Provides original encoder to encode image to original format.

Returns: ImageEncoder

◆ PointIntersection()

Intersection PointIntersection ( const Point & point ) const

inlinenodiscard

Checks intersection between point and image.

Parameters

point point

Returns: Image::Intersection type

References Point::x, and Point::y.

◆ RectangleIntersection()

Intersection RectangleIntersection ( const Rectangle & rectangle ) const

inlinenodiscard

Check intersection between rectangle and image.

Parameters

rectangle Rectangle

Returns: Image::Intersection type

Exceptions

ImageException when there is an processing error

References Rectangle::GetBottomLeft(), Rectangle::GetBottomRight(), Rectangle::GetTopLeft(), Rectangle::GetTopRight(), Point::x, and Point::y.

Referenced by CropRectangle().

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◆ Resize()

std::shared_ptr< Image > Resize ( float factor ) const

inlinenodiscard

Resize image to new image.

Parameters

factor resize factor. Valid values are positive real number except 0.

Returns: resized Image

Exceptions

EnrollmentInvalidArgumentException	when factor is not positive real number except 0.
ImageException	when there is an processing error

Referenced by ResizeToMaxDimension().

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◆ ResizeToMaxDimension()

std::shared_ptr< Image > ResizeToMaxDimension ( ImageDimension maxDimension ) const

inlinenodiscard

Resize image to new image with given max dimension.

When image has smaller dimension than maxDimension, then image is not resized. Otherwise image is resized to maxDimension with keeping aspect ratio.

Parameters

maxDimension max dimension of new image

Returns: resized Image or copy of original image when original image has smaller dimension than maxDimension.

Exceptions

ImageException when there is an processing error

References Height(), Resize(), and Width().

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◆ SaveAs()

void SaveAs ( const std::string & path ) const

inline

Save Image in given path.

The image type is deduced from file extension. The default image encoder parameters are used. If you want to change encoding parameters, then use function EncodeIn with appropriate ImageEncoder.

Parameters

path	path and file name where to save image on filesystem

Exceptions

ImageException	when ImageEncoder throws
ImageException	when it is not possible convert image to raw data

References AsRawImage().

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◆ SaveIn()

void SaveIn ( ImageSaver & saver ) const

inline

Save Image in given ImageSaver.

Parameters

saver specific ImageSaver to use to save file

Exceptions

ImageException when ImageSaver throws

References AsRawImage(), and ImageSaver::Save().

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◆ Width()

ImageWidth Width ( ) const

inlinenodiscard

Returns image width.

Returns: ImageWidth

Referenced by AsRawBGR(), AsRawBGRA(), AsRawGrayscale(), AsRawImage(), and ResizeToMaxDimension().

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The documentation for this class was generated from the following files:

Image/Image.h
Image/Image.doxmd

Classes

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ Intersection

Member Function Documentation

◆ AsBGR()

◆ AsBGRA()

◆ AsRawBGR()

◆ AsRawBGRA()

◆ AsRawGrayscale()

◆ AsRawImage()

◆ ChangeDpiTo() [1/2]

◆ ChangeDpiTo() [2/2]

◆ Channels()

◆ CircleIntersection()

◆ CropAlignedRectangle() [1/3]

◆ CropAlignedRectangle() [2/3]

◆ CropAlignedRectangle() [3/3]

◆ CropCircle()

◆ CropRectangle() [1/3]

◆ CropRectangle() [2/3]

◆ CropRectangle() [3/3]

◆ Decode() [1/4]

◆ Decode() [2/4]

◆ Decode() [3/4]

◆ Decode() [4/4]

◆ DecodeRawImage()

◆ DeduceType()

◆ Dpi()

◆ DrawShape()

◆ EncodeIn()

◆ Height()

◆ MaskImageBy()

◆ operator==()

◆ OriginalEncoder()

◆ PointIntersection()

◆ RectangleIntersection()

◆ Resize()

◆ ResizeToMaxDimension()

◆ SaveAs()

◆ SaveIn()

◆ Width()