Image Class Reference

Image objects are used to represent spatial data, for example a remote sensing data set. More...

#include <Image.h>

Inherits Data.

Inheritance diagram for Image:

[legend]Collaboration diagram for Image:

[legend]List of all members.

Public Member Functions
	Image (const char *name, int width, int height, NameList *classNames, NameList *dimNames)
	Creates an empty Image object, based on the passed meta-data.
	Image (const char *name, istream &is, int width, int height, NameList *classNames, NameList *dimNames, bool readDoubles=false)
	Creates an Image object, and fills it from the passed file stream, which refers to a binary data set.
int	getWidth ()
	Accessor method.
int	getHeight ()
	Accessor method.
void	split (bool vert, int strips, string &baseFname)
	Splits the image into numStrips strips.
void	flip ()
	Flips an image data set about its diagonal.
void	show (string d1Str, string d2Str, string d3Str, ofstream &ofs)
	Simple image viewer for portable pixel map (.ppm) format.

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Detailed Description

Image objects are used to represent spatial data, for example a remote sensing data set.

They associate a width and height with a Data object, and offer methods for:

• Splitting the image into vertical or horizontal strips. This is used to support cross-validating train/test protocols over spatially disjoint areas.
• Displaying the feature data as maps.
• Rotating the image about its diagonal.

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Constructor & Destructor Documentation

Image::Image (  const char *  name, int  width, int  height, NameList *  classNames, NameList *  dimNames )  [inline]

Creates an empty Image object, based on the passed meta-data. The data can be filled in later using Data::loadFromStreamAscii(), Data::loadFromStreamBinary(), or Data::setData(). Parameters: name  The name by which to refer to the Image in logged messages. width  The X dimension of the Image in pixels. height  The Y dimension of the Image in pixels. classNames  NameList describing the label names for this data set. dimNames  The NameList that describes the data set's features.

Image::Image (  const char *  name, istream &  is, int  width, int  height, NameList *  classNames, NameList *  dimNames, bool  readDoubles = false )  [inline]

Creates an Image object, and fills it from the passed file stream, which refers to a binary data set. The data are assumed to be labeled, with the data labels following the data matrix in a second array. Parameters: name  The name by which to refer to the Image in logged messages. is  The input stream that refers to the data file. width  The X dimension of the Image in pixels. height  The Y dimension of the Image in pixels. classNames  NameList describing the label names for this data set. dimNames  The NameList that describes the data set's features. readDoubles  If true, data are double-precision, otherwise false.

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Member Function Documentation

void Image::flip (   )

Flips an image data set about its diagonal.

int Image::getHeight (   )  [inline]

Accessor method. Returns: The height of the Image in pixels

int Image::getWidth (   )  [inline]

Accessor method. Returns: The width of the Image in pixels

void Image::show (  string  d1Str, string  d2Str, string  d3Str, ofstream &  ofs )

Simple image viewer for portable pixel map (.ppm) format. Just specify the data bands to use for the R/G/B values. Parameters: d1Str  Name of feature to represent Red. d2Str  Name of feature to represent Green. d3Str  Name of feature to represent Blue. ofs  Output file stream to send image data to.

void Image::split (  bool  vert, int  numStrips, string &  baseFname )

Splits the image into numStrips strips. The strips are then saved to numStrips files, each of the form 'baseFnamei.txt', with i varying from 0 to numStrips-1. Parameters: vert  If true, the strips are vertical, otherwise horizontal. numStrips  How many pieces to divide the image into. baseFname  The base part of the file name to which to save the strip data.

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

• Image.h
• Image.cpp

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