averageDistanceOfNFarOffPoints

Determines the average of the n far off (most distant) points for every point in a distance matrix.

This corresponds to the average of the n maximum values (rows) for each column of the distance matrix.

Parameters

distance_matrix : Image The a distance matrix to be processed. distance_list_destination : Image A vector image with the same width as the distance matrix and height=1, depth=1. Determined average distances will be written into this vector. n_far_off_points_to_find : Number Number of largest distances which should be averaged.

Categories: Graphs, Measurements

Availability: Available in Fiji by activating the update sites clij and clij2. This function is part of clij2_-2.5.0.1.jar.

Usage in ImageJ macro

Ext.CLIJ2_averageDistanceOfNFarOffPoints(Image distance_matrix, Image distance+_list_destination, Number n_far_off_points_to_find);

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 distance_matrix = clij2.push(distance_matrixImagePlus);
distance+_list_destination = clij2.create(distance_matrix);
int n_far_off_points_to_find = 10;

// Execute operation on GPU
clij2.averageDistanceOfNFarOffPoints(distance_matrix, distance+_list_destination, n_far_off_points_to_find);

// show result
distance+_list_destinationImagePlus = clij2.pull(distance+_list_destination);
distance+_list_destinationImagePlus.show();

// cleanup memory on GPU
clij2.release(distance_matrix);
clij2.release(distance+_list_destination);

Matlab

% init CLIJ and GPU
clij2 = init_clatlab();

% get input parameters
distance_matrix = clij2.pushMat(distance_matrix_matrix);
distance+_list_destination = clij2.create(distance_matrix);
n_far_off_points_to_find = 10;

% Execute operation on GPU
clij2.averageDistanceOfNFarOffPoints(distance_matrix, distance+_list_destination, n_far_off_points_to_find);

% show result
distance+_list_destination = clij2.pullMat(distance+_list_destination)

% cleanup memory on GPU
clij2.release(distance_matrix);
clij2.release(distance+_list_destination);

Icy JavaScript

// init CLIJ and GPU
importClass(net.haesleinhuepf.clicy.CLICY);
importClass(Packages.icy.main.Icy);

clij2 = CLICY.getInstance();

// get input parameters
distance_matrix_sequence = getSequence();
distance_matrix = clij2.pushSequence(distance_matrix_sequence);
distance+_list_destination = clij2.create(distance_matrix);
n_far_off_points_to_find = 10;

// Execute operation on GPU
clij2.averageDistanceOfNFarOffPoints(distance_matrix, distance+_list_destination, n_far_off_points_to_find);

// show result
distance+_list_destination_sequence = clij2.pullSequence(distance+_list_destination)
Icy.addSequence(distance+_list_destination_sequence);
// cleanup memory on GPU
clij2.release(distance_matrix);
clij2.release(distance+_list_destination);

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