Hi,
To calculate the area of black circles, ensure that the image is in binary format, i.e., the circles are black (0) and the background is white (1). Divide the number of black pixels by the total number of pixels (10,000 for a 100x100 image) to get the fraction of the area occupied by the circles. Refer to an example code below for better understanding:
% Generate or load your binary image with black circles
image = imread('your_image.png'); % Replace with your image generation code
% Convert to binary if necessary
binaryImage = imbinarize(image);
% Invert if circles are white
binaryImage = ~binaryImage;
% Calculate area of black circles using nnz
blackPixels = nnz(~binaryImage); % Count black pixels
totalPixels = numel(binaryImage);
circleAreaPercentage = (blackPixels / totalPixels) * 100;
% Display the result
fprintf('The area occupied by the black circles is: %.2f%%\n', circleAreaPercentage);
