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reference_absolute.md

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absolute

Computes the absolute value of every individual pixel x in a given image.

f(x) = |x|

Category: Math

absolute often follows after

absolute is often followed by

Usage in ImageJ macro

Ext.CLIJ2_absolute(Image source, Image destination);

Usage in object oriented programming languages

Java 
// init CLIJ and GPU
import net.haesleinhuepf.clij2.CLIJ2;
import net.haesleinhuepf.clij.clearcl.ClearCLBuffer;
CLIJ2 clij2 = CLIJ2.getInstance();

// get input parameters
ClearCLBuffer source = clij2.push(sourceImagePlus);
destination = clij2.create(source);


// Execute operation on GPU
clij2.absolute(source, destination);

// show result
destinationImagePlus = clij2.pull(destination);
destinationImagePlus.show();

// cleanup memory on GPU
clij2.release(source);
clij2.release(destination);
Matlab 
% init CLIJ and GPU
clij2 = init_clatlab();

% get input parameters
source = clij2.pushMat(source_matrix);
destination = clij2.create(source);


% Execute operation on GPU
clij2.absolute(source, destination);

% show result
destination = clij2.pullMat(destination)

% cleanup memory on GPU
clij2.release(source);
clij2.release(destination);
Icy JavaScript 
// init CLIJ and GPU
importClass(net.haesleinhuepf.clicy.CLICY);
importClass(Packages.icy.main.Icy);

clij2 = CLICY.getInstance();


// get input parameters
source_sequence = getSequence();
source = clij2.pushSequence(source_sequence);
destination = clij2.create(source);


// Execute operation on GPU
clij2.absolute(source, destination);

// show result
destination_sequence = clij2.pullSequence(destination)
Icy.addSequence(destination_sequence);
// cleanup memory on GPU
clij2.release(source);
clij2.release(destination);
clEsperanto Python (experimental) 
import pyclesperanto_prototype as cle

cle.absolute(clij, source, destination)

clEsperanto CLIc C++ (experimental) 
// Initialise GPU information.
    cle::GPU gpu;
    cle::CLE cle(gpu);

// Initialise device memory and push from host
cle::Buffer gpuInput = cle.Push<float>(input_img);
cle::Buffer gpuOutput = cle.Create<float>(input_img);

// Call kernel
cle.Absolute(gpuInput, gpuOutput);  

// pull device memory to host
Image<float> output_img = cle.Pull<float>(gpuOutput);    

</pre>









### Example scripts
 [absolute.ijm](https://github.com/clij/clij2-docs/blob/master/src/main/macro/absolute.ijm)  


[Back to CLIJ2 reference](https://clij.github.io/clij2-docs/reference)
[Back to CLIJ2 documentation](https://clij.github.io/clij2-docs)

[Imprint](https://clij.github.io/imprint)