// Opening (erosion followed by dilation) opened = imopen(binary, se);
// Closing (dilation followed by erosion) closed = imclose(binary, se); 8.1 Simple Thresholding // Global threshold threshold = 120; segmented = gray_img > threshold; imshow(segmented); 8.2 Otsu’s Thresholding // Compute Otsu threshold automatically [level, intensity] = otsu_thresh(gray_img); bw_otsu = gray_img > level; 8.3 Connected Components Labeling [labeled_img, num_objects] = bwlabel(bw_otsu); disp("Number of objects detected: " + string(num_objects)); 9. Fourier Transform for Frequency Domain Processing // Compute FFT F = fft2(double(gray_img)); F_shifted = fftshift(F); // Magnitude spectrum magnitude = log(abs(F_shifted) + 1); imshow(magnitude, []); digital image processing using scilab pdf
Creative Commons Attribution 4.0 International (CC BY 4.0) Last updated: 2025 // Opening (erosion followed by dilation) opened =
// 6. Threshold processed = edges > 50; imshow(processed); end segmented = gray_img >