Extract 80 by 80 patch from image by taking center point of each object in image.
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Image Analyst on 6 May 2014
% Get the size of the image
[rows, columns, numberOfColorChannels] = size(yourImage);
% Determine starting and ending rows and columns.
row1 = floor(rows/2 - 40);
col1 = floor(columns/2-40);
% Extract sub-image using imcrop():
subImage = imcrop(yourImage, [col1, row1, 80, 80]);