69 lines
1.8 KiB
Java
69 lines
1.8 KiB
Java
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import ij.ImagePlus;
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import ij.plugin.filter.PlugInFilter;
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import ij.process.ImageProcessor;
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import java.util.*;
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/**
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* This is a template for a plugin that requires one image to
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* be opened, and takes it as parameter.
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*/
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public class Gamma_2018_10_24 implements PlugInFilter {
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protected ImagePlus image;
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/**
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* This method gets called by ImageJ / Fiji to determine
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* whether the current image is of an appropriate type.
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*
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* @param arg can be specified in plugins.config
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* @param image is the currently opened image
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* @see ij.plugin.filter.PlugInFilter#setup(java.lang.String, ij.ImagePlus)
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*/
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@Override
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public int setup(String arg, ImagePlus image) {
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this.image = image;
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/*
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* The current return value accepts all gray-scale
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* images (if you access the pixels with ip.getf(x, y)
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* anyway, that works quite well.
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*
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* It could also be DOES_ALL; you can add "| NO_CHANGES"
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* to indicate that the current image will not be
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* changed by this plugin.
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*
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* Beware of DOES_STACKS: this will call the run()
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* method with all slices of the current image
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* (channels, z-slices and frames, all). Most likely
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* not what you want.
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*/
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return DOES_8G | DOES_16 | DOES_32;
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}
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/**
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* This method is run when the current image was accepted.
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*
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* @param ip is the current slice (typically, plugins use
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* the ImagePlus set above instead).
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* @see ij.plugin.filter.PlugInFilter#run(ij.process.ImageProcessor)
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*/
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@Override
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public void run(ImageProcessor ip) {
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int k = 256;
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int aMax = k -1;
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double gamma = 2.8;
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// bauen uns eine LUT (Look-Up-Table)
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int[] lut = new int[k];
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for (int a = 0; a < k; ++a) {
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double aa = ((double) a) / aMax;
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double bb = Math.pow(aa, gamma);
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int b = (int) Math.round(bb*aMax);
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lut[a] = b;
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}
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ip.applyTable(lut);
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}
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}
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