de.lmu.ifi.dbs.elki.data.images

Class AbstractComputeColorHistogram

java.lang.Object

de.lmu.ifi.dbs.elki.data.images.AbstractComputeColorHistogram

All Implemented Interfaces:

ComputeColorHistogram, InspectionUtilFrequentlyScanned, Parameterizable

Direct Known Subclasses:

ComputeHSBColorHistogram, ComputeNaiveRGBColorHistogram

public abstract class AbstractComputeColorHistogram
extends Object
implements ComputeColorHistogram

Abstract class for color histogram computation.

Constructor Summary

Constructors

Constructor and Description
AbstractComputeColorHistogram()

Method Summary

Methods

Modifier and Type	Method and Description
double[]	computeColorHistogram(File file, File mask) Compute a color histogram given a file name.
protected abstract int	getBinForColor(int rgb) Compute the bin number from a pixel color value.
protected abstract int	getNumBins() Get the number of bins.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractComputeColorHistogram

public AbstractComputeColorHistogram()

Method Detail

computeColorHistogram

public double[] computeColorHistogram(File file,
                             File mask)
                               throws IOException

Description copied from interface: ComputeColorHistogram

Compute a color histogram given a file name. The mask file (which may be null) is expected to use >50% transparent or black to mask pixels, Non-transparent white to keep pixels. Alpha values are not used.

Specified by:

computeColorHistogram in interface ComputeColorHistogram

Parameters:

file - File name

mask - Mask file (optional)

Returns:

Color histogram

Throws:

IOException - on file read errors.

getNumBins

protected abstract int getNumBins()

Get the number of bins.

Returns:

Number of bins

getBinForColor

protected abstract int getBinForColor(int rgb)

Compute the bin number from a pixel color value.

Parameters:

rgb - Pixel color value

Returns:

Bin number