Image resampler for DPI-change operations, including upsampling and downsampling using area interpolation resampling algorithm. More...

#include <Image.h>

Collaboration diagram for Image::AreaImageResampler:

Public Member Functions
	AreaImageResampler (ImageDpi targetDpi)
	Constructs pixel-area-relation interpolation image resampler for a target DPI.
std::shared_ptr< Image >	Resample (const inno::Image &image) const final
	Resample image to a target DPI using pixel-area-relation interpolation.

Protected Member Functions
ImageDpi	GetDpi () const
	Retrieves target DPI of the resampler.

Detailed Description

Image resampler for DPI-change operations, including upsampling and downsampling using area interpolation resampling algorithm.

Constructor & Destructor Documentation

◆ AreaImageResampler()

AreaImageResampler ( ImageDpi targetDpi )

inlineexplicit

Constructs pixel-area-relation interpolation image resampler for a target DPI.

This constructor initializes the image resampler to resample an image to the specified DPI using pixel-area-relation interpolation. In most cases, this resampler provides the fastest resampling among the Enrollment SDK resamplers.

Parameters

targetDpi The DPI (dots per inch) of the new image.

Exceptions

EnrollmentInvalidArgumentException when targetDpi is 0

References Image::ImageResampler::ImageResampler().

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Member Function Documentation

◆ GetDpi()

ImageDpi GetDpi ( ) const

inlinenodiscardprotectedinherited

Retrieves target DPI of the resampler.

Returns: The target DPI (dots per inch) of the resampler

Referenced by Image::AreaImageResampler::Resample(), Image::BicubicImageResampler::Resample(), and Image::NISTImageResampler::Resample().

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◆ Resample()

std::shared_ptr< Image > Resample ( const inno::Image & image ) const

inlinenodiscardfinalvirtual

Resample image to a target DPI using pixel-area-relation interpolation.

It creates new image as result of resampling with factor target DPI/original DPI. In most cases, this resampling method provides the fastest resampling among the Enrollment SDK resamplers.

Parameters

image Image to resize.

Returns: image with given DPI

Exceptions

ImageException when there is an processing error

Implements Image::ImageResampler.

References Image::ImageResampler::GetDpi().