topHatOctagon

Applies a minimum filter with kernel size 3x3 n times to an image iteratively.

Odd iterations are done with box neighborhood, even iterations with a diamond. Thus, with n > 2, the filter shape is an octagon. The given number of iterations - 2 makes the filter result very similar to minimum sphere.

Categories: Background, Filter

Availability: Available in Fiji by activating the update sites clij and clij2. This function is part of clijx_-0.32.0.1.jar.

Usage in ImageJ macro

Ext.CLIJx_topHatOctagon(Image input, Image destination, Number iterations);

Usage in object oriented programming languages

Java

// init CLIJ and GPU
import net.haesleinhuepf.clijx.CLIJx;
import net.haesleinhuepf.clij.clearcl.ClearCLBuffer;
CLIJx clijx = CLIJx.getInstance();

// get input parameters
ClearCLBuffer input = clijx.push(inputImagePlus);
destination = clijx.create(input);
int iterations = 10;

// Execute operation on GPU
clijx.topHatOctagon(input, destination, iterations);

// show result
destinationImagePlus = clijx.pull(destination);
destinationImagePlus.show();

// cleanup memory on GPU
clijx.release(input);
clijx.release(destination);

Matlab

% init CLIJ and GPU
clijx = init_clatlabx();

% get input parameters
input = clijx.pushMat(input_matrix);
destination = clijx.create(input);
iterations = 10;

% Execute operation on GPU
clijx.topHatOctagon(input, destination, iterations);

% show result
destination = clijx.pullMat(destination)

% cleanup memory on GPU
clijx.release(input);
clijx.release(destination);

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