Class UBytePixArray

java.lang.Object

com.xinapse.image.PixArray

com.xinapse.image.BytePixArray

com.xinapse.image.UBytePixArray

final class UBytePixArray
extends BytePixArray

A representation of an array of unsigned byte pixels, with intensity range 0..255. Note that all pixel values stored and accessed by this class are of the primitive type byte. It is up the user to convert these to unsigned before the pixel values are used. This would typically be done using a statement like:
short s = (short) (pixel[i] & 0xFF);

Field Summary

Fields inherited from class PixArray

dataType

Method Summary

Modifier and Type	Method	Description
int[]	getHisto(int nbins)	Computes a histogram of a UBytePixArray.
Object	getPutPix(Object pix, int[] pixIdx, PixelOp op)	Gets/puts a single pixel value from/to an an image.

Methods inherited from class BytePixArray

getPutPix, getPutSlice, write

Methods inherited from class PixArray

__getPix, copyPix, getInstance, getInstance, getMinMax, newInstance

Methods inherited from class Object

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

Method Details

getHisto

public int[] getHisto(int nbins)
               throws InvalidImageException

Computes a histogram of a UBytePixArray.

Overrides:

getHisto in class BytePixArray

Parameters:

nbins - the number of bins in the histogram.

Returns:

an int[] of length 2 where the first element is the number of pixels of value false and the second element is the number of pixels of value true.

Throws:

InvalidImageException - if the histogram can't be computed.

getPutPix

public Object getPutPix(Object pix,
 int[] pixIdx,
 PixelOp op)

Gets/puts a single pixel value from/to an an image. Returns a java Short cast to Object corresponding to the picture primitve type. This represents the pixel intensity value for the pixel indexed by each element of pixIdx, and is returned as a Short (rather than a Byte) since a Byte value does not have the dynamic range to represent an unsigned byte value.

Overrides:

getPutPix in class BytePixArray

Parameters:

pix - a pixel value for a put operation or null for a get operation; if non-null, this must be a java.lang.Short.

pixIdx - an array of length at least nDim with elements 0 to nDim-1 equal to the index in that image dimension.

op - the type of operation (GET or PUT).

Returns:

a pixel value for a get operation or the supplied pixel for a put operation.

Throws:

IllegalArgumentException - the pixel value is of the wrong data type.