I am trying to blur the image, but I did not succeed. I am keep getting almost black image? What am I missing here?
clc;clear all;img = imread("Q3_Input", "tif");imshow(img);[M, N] = size(img);filter = averageFilter(img, M, N);%blurredImage = conv2(single(img), filter, 'full');
figure;imshow(filter, []);%{
since the filter 3x3 i == 1 & j == 1 or i == 1 & (N - j) == 0 or (M - i) & j == 1 or (M - i) & (N - j) == 0 covers the corner areas x = covered areas __________ |_x_|__|_x_| |__|__|__| |_x_|__|_x_| the other coverts the middle of the area |__|_x_|__| |_x_|_x_|_x_| |__|_x_|__|%}
function img = averageFilter(image, M, N) newImg = zeros(M, N); for i = 1: M for j = 1: N if i == 1 if j == 1 summation = 0; for k = i: i + 1 for l = j: j + 1 summation = summation + image(k,l); end end newImg(i, j) = ceil(summation / 4.0); elseif (N - j) == 0 for k = i: i + 1 for l = j - 1: j summation = summation + image(k,l); end end newImg(i, j) = ceil(summation / 4.0); else for k = i: i + 1 for l = j - 1: j + 1 summation = summation + image(k,l); end end newImg(i, j) = ceil(summation / 6.0); end elseif (M - i) == 0 if j == 1 for k = i - 1: i for l = j: j + 1 summation = summation + image(k,l); end end newImg(i, j) = ceil(summation / 4.0); elseif (N - j) == 0 for k = i -1: i for l = j -1: j summation = summation + image(k,l); end end newImg(i, j) = ceil(summation / 4.0); else for k = i - 1: i for l = j - 1: j + 1 summation = summation + image(k,l); end end newImg(i, j) = ceil(summation / 6.0); end else if j == 1 for k = i - 1: i + 1 for l = j: j + 1 summation = summation + image(k,l); end end newImg(i, j) = ceil(summation / 6.0); elseif (N - j) == 0 for k = i - 1: i + 1 for l = j - 1: j summation = summation + image(k,l); end end newImg(i, j) = ceil(summation / 6.0); else for k = i - 1: i + 1 for l = j - 1: j + 1 summation = summation + image(k,l); end end newImg(i, j) = ceil(summation / 9.0); end end end end img = newImg;end
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