ij.process

Class DownsizeTable

java.lang.Object

ij.process.DownsizeTable

public class DownsizeTable
extends java.lang.Object

A table for easier downsizing by convolution with a kernel. Supports the interpolation methods of ImageProcessor: none, bilinear, bicubic Convention used: The left edges of the first pixel are the same for source and destination. E.g. when downsizing by a factor of 2, pixel 0 of the destination takes the space of pixels 0 and 1 of the source. Example for use: Downsizing row 0 of 'pixels' from 'roi.width' to 'destinationWidth'. The input range is given by the roi rectangle. Output is written to row 0 of 'pixels2' (width: 'destinationWidth') DownSizeTable dt = new DownSizeTable(width, roi.x, roi.width, destinationWidth, ImageProcessor.BICUBIC); int tablePointer = 0; for (int srcPoint=dt.srcStart, srcPoint<=dt.srcEnd; srcPoint++) { float v = pixels[srcPoint]; for (int i=0; i

Field Summary

Fields

Modifier and Type	Field and Description
int[]	indices For each source point between srcStart and srcEnd, indices of destination points where the data should be added.
int	kernelSize Number of kernel points per source data point
int	srcEnd index of the last point of the source data that should be accessed
int	srcStart index of the first point of the source data that should be accessed
float[]	weights For each source point, weights for adding it to the destination point given in the corresponding element of 'indices'

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

kernelSize

public final int kernelSize

Number of kernel points per source data point

srcStart

public final int srcStart

index of the first point of the source data that should be accessed

srcEnd

public final int srcEnd

index of the last point of the source data that should be accessed

indices

public final int[] indices

For each source point between srcStart and srcEnd, indices of destination points where the data should be added. Arranged in blocks of 'kernelSize' points. E.g. for kernelSize=2, array elements 0,1 are for point srcStart, 2,3 for point srcStart+1, etc.

weights

public final float[] weights

For each source point, weights for adding it to the destination point given in the corresponding element of 'indices'