Imports images with standard formats into Isis as cubes. More...

#include <ImageImporter.h>

Inheritance diagram for Isis::ImageImporter:

Collaboration diagram for Isis::ImageImporter:

Public Member Functions
	ImageImporter (FileName inputName)
	Construct the importer.

virtual	~ImageImporter ()
	Destruct the importer.

void	operator() (Buffer &out) const
	The method for processing the output cube in place, called for each line of the output image.

Cube *	import (FileName outputName)
	Import the image with default output attributes.

Cube *	import (FileName outputName, CubeAttributeOutput &att)
	Import the input image this instance was constructed with into the given output Isis cube with the given output attributes.

void	setNullRange (double min, double max)
	Set the range of DN values within which a pixel from the input image will be set to Null in the output.

void	setLrsRange (double min, double max)
	Set the range of DN values within which a pixel from the input image will be set to LRS in the output.

void	setHrsRange (double min, double max)
	Set the range of DN values within which a pixel from the input image will be set to HRS in the output.

void	setSamples (int s)
	Set the sample dimension (width) of the output image.

void	setLines (int l)
	Set the line dimension (height) of the output image.

void	setBands (int b)
	Set the band dimension (depth) of the output image.

int	samples () const
	The sample dimension (width) of the output image.

int	lines () const
	The line dimension (height) of the output image.

int	bands () const
	The band dimension (depth) of the output image.

FileName	filename () const
	The filename of the input image this instance was constructed with.

virtual PvlGroup	convertProjection () const
	Pure virtual method for converting projection information in the file being imported to an ISIS Mapping group.

virtual bool	isGrayscale () const =0
	Pure virtual method for returning true if the image is grayscale.

virtual bool	isRgb () const =0
	Pure virtual method for returning true if the image is RGB (no alpha).

virtual bool	isArgb () const =0
	Pure virtual method for returning true if the image is RGBA.

Static Public Member Functions
static ImageImporter *	fromFileName (FileName inputName)
	A static (factory) method for constructing an ImageImporter instance from an input filename.

Protected Types
typedef int(ImageImporter::*	GetChannelMethod) (int pixel) const
	Friendly alias for a method used to get a particular color channel.

Protected Member Functions
Cube *	createOutput (FileName outputName, CubeAttributeOutput &att)
	Create the output cube from the given filename and attributes.

void	setDefaultBands ()
	Set the number of bands to be created for the output cube based on the number of color channels in the input image.

double	testSpecial (double pixel) const
	Tests a pixel against the Null, HRS, and LRS ranges defined by the importer's handler.

virtual GetChannelMethod	getBandChannel (int band) const
	Retrieve the method responsible for fetching the color channel from the input image corresponding to the current band out of output being filled.

virtual int	convertRgbToGray (int pixel) const
	Convert the current pixel, taken from an RGB/A image, and blend its RGB components into a single grayscale DN.

virtual void	updateRawBuffer (int line, int band) const =0
	Pure virtual method that updates the buffer used to store chunks of the input data at a time.

virtual int	getPixel (int s, int l) const =0
	Pure virtual method that returns a representation of a pixel for the input format that can then be broken down into specific gray or RGB/A components.

virtual int	getGray (int pixel) const =0
	Pure virtual method for retrieving the gray component of the given pixel.

virtual int	getRed (int pixel) const =0
	Pure virtual method for retrieving the red component of the given pixel.

virtual int	getGreen (int pixel) const =0
	Pure virtual method for retrieving the green component of the given pixel.

virtual int	getBlue (int pixel) const =0
	Pure virtual method for retrieving the blue component of the given pixel.

virtual int	getAlpha (int pixel) const =0
	Pure virtual method for retrieving the alpha component of the given pixel.

Detailed Description

Imports images with standard formats into Isis as cubes.

Abstract base class for a series of image importers. Each importer handles a specialized suite of standard image formats, and can be used as a black-box with the import() method, or for finer control, the importer can act as a functor in a ProcessByLine routine.

Author: 2012-03-16 Travis Addair

Member Typedef Documentation

◆ GetChannelMethod

typedef int(ImageImporter::* Isis::ImageImporter::GetChannelMethod) (int pixel) const

protected

Friendly alias for a method used to get a particular color channel.

Constructor & Destructor Documentation

◆ ImageImporter()

Isis::ImageImporter::ImageImporter ( FileName inputName )

Construct the importer.

Parameters

inputName The name of the input image

◆ ~ImageImporter()

Isis::ImageImporter::~ImageImporter ( )

virtual

Destruct the importer.

Also deletes the output cube handle.

Member Function Documentation

◆ bands()

int Isis::ImageImporter::bands ( ) const

The band dimension (depth) of the output image.

Returns: The band dimension

Referenced by createOutput(), getBandChannel(), import(), and Isis::JP2Importer::JP2Importer().

◆ convertProjection()

PvlGroup Isis::ImageImporter::convertProjection ( ) const

virtual

Pure virtual method for converting projection information in the file being imported to an ISIS Mapping group.

Returns: An ISIS Mapping group

Reimplemented in Isis::TiffImporter.

Referenced by import().

◆ convertRgbToGray()

int Isis::ImageImporter::convertRgbToGray ( int pixel ) const

protectedvirtual

Convert the current pixel, taken from an RGB/A image, and blend its RGB components into a single grayscale DN.

The three color components are weighted by the following formula:

gray = (red * 11 + green * 16 + blue * 5) / 32

This formula was taken from the Qt documentation on converting an RGB value to grayscale: http://qt-project.org/doc/qt-4.8/qcolor.html#qGray-2

Parameters

pixel The pixel value to be broken up into RGB components and converted to grayscale

Returns: The grayscale DN value

References getBlue(), getGreen(), and getRed().

Referenced by Isis::JP2Importer::getGray(), and Isis::TiffImporter::getGray().

◆ createOutput()

Cube * Isis::ImageImporter::createOutput	(	FileName	outputName,
		CubeAttributeOutput &	att )

protected

Create the output cube from the given filename and attributes.

Set its dimensions based on those encapsulated by the importer.

Parameters

outputName	The filename of the output cube
att	The attributes for writing the output cube

Returns: The newly created cube handle devoid of any data

References bands(), Isis::Cube::create(), lines(), samples(), and Isis::Cube::setDimensions().

Referenced by import().

◆ filename()

FileName Isis::ImageImporter::filename ( ) const

The filename of the input image this instance was constructed with.

Returns: A copy of the input filename

Referenced by Isis::JP2Importer::JP2Importer().

◆ fromFileName()

ImageImporter * Isis::ImageImporter::fromFileName ( FileName inputName )

static

A static (factory) method for constructing an ImageImporter instance from an input filename.

The specific subclass of the returned instance is determined from the interpreted image format of the input image. Such tests are done by reading a minimal amount of the input data necessary to determine the format. It is the caller's responsibility to delete the importer instance when they are finished with it. Note that deleting the importer will also delete the cube handle returned by the import() method.

Parameters

inputName The filename of the input image to be imported

Returns: A pointer to the instantiated importer owned by the caller

References _FILEINFO_, Isis::JP2Decoder::IsJP2(), and Isis::IException::Programmer.

◆ getAlpha()

virtual int Isis::ImageImporter::getAlpha ( int pixel ) const

protectedpure virtual

Pure virtual method for retrieving the alpha component of the given pixel.

Parameters

pixel Representation of a pixel for the input format

Returns: The alpha component

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

Referenced by getBandChannel().

◆ getBandChannel()

ImageImporter::GetChannelMethod Isis::ImageImporter::getBandChannel ( int band ) const

protectedvirtual

Retrieve the method responsible for fetching the color channel from the input image corresponding to the current band out of output being filled.

This will always be the getGray() method for single band output images. For RGB/A images, band 1 will be red, band 2 green, band 3 blue, and band 4 alpha.

Parameters

band	The current band of the output image

Returns: The method that converts input pixels into the current band's color component

References _FILEINFO_, bands(), getAlpha(), getBlue(), getGray(), getGreen(), getRed(), and Isis::IException::Programmer.

Referenced by operator()().

◆ getBlue()

virtual int Isis::ImageImporter::getBlue ( int pixel ) const

protectedpure virtual

Pure virtual method for retrieving the blue component of the given pixel.

Parameters

pixel Representation of a pixel for the input format

Returns: The blue component

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

Referenced by convertRgbToGray(), and getBandChannel().

◆ getGray()

virtual int Isis::ImageImporter::getGray ( int pixel ) const

protectedpure virtual

Pure virtual method for retrieving the gray component of the given pixel.

Parameters

pixel Representation of a pixel for the input format

Returns: The gray component

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

Referenced by getBandChannel().

◆ getGreen()

virtual int Isis::ImageImporter::getGreen ( int pixel ) const

protectedpure virtual

Pure virtual method for retrieving the green component of the given pixel.

Parameters

pixel Representation of a pixel for the input format

Returns: The green component

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

Referenced by convertRgbToGray(), and getBandChannel().

◆ getPixel()

virtual int Isis::ImageImporter::getPixel	(	int	s,
		int	l ) const

protectedpure virtual

Pure virtual method that returns a representation of a pixel for the input format that can then be broken down into specific gray or RGB/A components.

Parameters

s	The sample of the desired pixel
l	The line of the desired pixel

Returns: The format-specific pixel representation

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

Referenced by operator()().

◆ getRed()

virtual int Isis::ImageImporter::getRed ( int pixel ) const

protectedpure virtual

Pure virtual method for retrieving the red component of the given pixel.

Parameters

pixel Representation of a pixel for the input format

Returns: The red component

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

Referenced by convertRgbToGray(), and getBandChannel().

◆ import() [1/2]

Cube * Isis::ImageImporter::import ( FileName outputName )

Import the image with default output attributes.

Parameters

outputName The filename of the output cube

◆ import() [2/2]

Cube * Isis::ImageImporter::import	(	FileName	outputName,
		CubeAttributeOutput &	att )

Import the input image this instance was constructed with into the given output Isis cube with the given output attributes.

This will do a black-box import using a ProcessByLine routine. The BandBin group will be updated in the output cube with the names of the color channels included. The output cube will be returned on completion of the import process so the caller can continue to modify the labels. The importer instance will retain ownership of this cube, such that the cube handle will be deallocated upon destruction of the importer.

Parameters

outputName	The filename of the output cube
att	The attributes for writing the output cube

Returns: A handle on the newly imported Isis cube owned by the importer

References _FILEINFO_, bands(), Isis::ProcessByBrick::BandsFirst, convertProjection(), createOutput(), Isis::PvlObject::findObject(), Isis::Cube::label(), and Isis::IException::Programmer.

◆ isArgb()

virtual bool Isis::ImageImporter::isArgb ( ) const

pure virtual

Pure virtual method for returning true if the image is RGBA.

Returns: True if the image is RGBA, false otherwise

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

Referenced by setDefaultBands().

◆ isGrayscale()

virtual bool Isis::ImageImporter::isGrayscale ( ) const

pure virtual

Pure virtual method for returning true if the image is grayscale.

Returns: True if the image is grayscale, false otherwise

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

Referenced by setDefaultBands().

◆ isRgb()

virtual bool Isis::ImageImporter::isRgb ( ) const

pure virtual

Pure virtual method for returning true if the image is RGB (no alpha).

Returns: True if the image is RGB, false otherwise

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

◆ lines()

int Isis::ImageImporter::lines ( ) const

The line dimension (height) of the output image.

Returns: The line dimension

Referenced by createOutput(), Isis::TiffImporter::getPixel(), and Isis::TiffImporter::TiffImporter().

◆ operator()()

void Isis::ImageImporter::operator() ( Buffer & out ) const

The method for processing the output cube in place, called for each line of the output image.

Enables the importer to be used as a functor in a custom ProcessByLine routine, bypassing the black-box import() method entirely. Care should be taken, however, to observe the requirements placed on the structure of such a processing routine by this method. For example, the JP2Importer child requires that the processing proceed in the direction of bands before lines, because its input data is structured in a BIL (band interlaced by line) format.

Parameters

out	A reference to a line of output data to be written to

References getBandChannel(), getPixel(), testSpecial(), and updateRawBuffer().

◆ samples()

int Isis::ImageImporter::samples ( ) const

The sample dimension (width) of the output image.

Returns: The sample dimension

Referenced by createOutput(), Isis::TiffImporter::getPixel(), Isis::JP2Importer::JP2Importer(), and Isis::TiffImporter::TiffImporter().

◆ setBands()

void Isis::ImageImporter::setBands ( int b )

Set the band dimension (depth) of the output image.

Because this importer only works on Grayscale, RGB, and RGBA images, possible values are 1, 3, and 4 for the respective color modes.

Parameters

b	The new band dimension

References _FILEINFO_, and Isis::IException::Programmer.

Referenced by Isis::JP2Importer::JP2Importer(), and setDefaultBands().

◆ setDefaultBands()

void Isis::ImageImporter::setDefaultBands ( )

protected

Set the number of bands to be created for the output cube based on the number of color channels in the input image.

References isArgb(), isGrayscale(), and setBands().

Referenced by Isis::QtImporter::QtImporter(), and Isis::TiffImporter::TiffImporter().

◆ setHrsRange()

void Isis::ImageImporter::setHrsRange	(	double	min,
		double	max )

Set the range of DN values within which a pixel from the input image will be set to HRS in the output.

Parameters

min	Any DN less than this value will not be set to HRS.
max	Any DN greater than this value will not be set to HRS.

◆ setLines()

void Isis::ImageImporter::setLines ( int l )

Set the line dimension (height) of the output image.

Parameters

l	The new line dimension

Referenced by Isis::JP2Importer::JP2Importer(), Isis::QtImporter::QtImporter(), and Isis::TiffImporter::TiffImporter().

◆ setLrsRange()

void Isis::ImageImporter::setLrsRange	(	double	min,
		double	max )

Set the range of DN values within which a pixel from the input image will be set to LRS in the output.

Parameters

min	Any DN less than this value will not be set to LRS.
max	Any DN greater than this value will not be set to LRS.

◆ setNullRange()

void Isis::ImageImporter::setNullRange	(	double	min,
		double	max )

Set the range of DN values within which a pixel from the input image will be set to Null in the output.

Parameters

min	Any DN less than this value will not be set to Null.
max	Any DN greater than this value will not be set to Null.

◆ setSamples()

void Isis::ImageImporter::setSamples ( int s )

Set the sample dimension (width) of the output image.

Parameters

s	The new sample dimension

Referenced by Isis::JP2Importer::JP2Importer(), Isis::QtImporter::QtImporter(), and Isis::TiffImporter::TiffImporter().

◆ testSpecial()

double Isis::ImageImporter::testSpecial ( double pixel ) const

protected

Tests a pixel against the Null, HRS, and LRS ranges defined by the importer's handler.

Any pixel value falling within one of these ranges will be converted into the given type of special pixel. In case of overlapping ranges, these tests will be performed in the order mentioned at the start of this description. By default, these ranges are set such that all incoming pixels will retain their original values.

Parameters

pixel The DN value to be tested

Returns: The valid DN or special pixel if it fell within the special ranges

References Isis::HIGH_REPR_SAT8, Isis::LOW_REPR_SAT8, and Isis::NULL8.

Referenced by operator()().

◆ updateRawBuffer()

virtual void Isis::ImageImporter::updateRawBuffer	(	int	line,
		int	band ) const

protectedpure virtual

Pure virtual method that updates the buffer used to store chunks of the input data at a time.

Does nothing for classes that read the entire input image into memory.

Parameters

line	Current line of the output buffer
band	Current band of the output buffer

Implemented in Isis::JP2Importer, Isis::QtImporter, and Isis::TiffImporter.

Referenced by operator()().

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

/Users/astamile/ISIS3/isis/src/base/objs/ImageImporter/ImageImporter.h
/Users/astamile/ISIS3/isis/src/base/objs/ImageImporter/ImageImporter.cpp

Public Member Functions

Static Public Member Functions

Protected Types

Protected Member Functions

Detailed Description

Member Typedef Documentation

◆ GetChannelMethod

Constructor & Destructor Documentation

◆ ImageImporter()

◆ ~ImageImporter()

Member Function Documentation

◆ bands()

◆ convertProjection()

◆ convertRgbToGray()

◆ createOutput()

◆ filename()

◆ fromFileName()

◆ getAlpha()

◆ getBandChannel()

◆ getBlue()

◆ getGray()

◆ getGreen()

◆ getPixel()

◆ getRed()

◆ import() [1/2]

◆ import() [2/2]

◆ isArgb()

◆ isGrayscale()

◆ isRgb()

◆ lines()

◆ operator()()

◆ samples()

◆ setBands()

◆ setDefaultBands()

◆ setHrsRange()

◆ setLines()

◆ setLrsRange()

◆ setNullRange()

◆ setSamples()

◆ testSpecial()

◆ updateRawBuffer()