Question

described above. (6 pts.) l Write a Matlab code to apply the high-boost filter to a medical image. (2 pt.)

Answer 1

In image processing, it is often desirable to .emphasize high frequency components representing the image details without eliminating low frequency components (such as sharpening). Thus, the high-boost filter can be used to enhance high frequency component.

Please find required MATLAB code along with necessary details in comments:

clear all; clc; close all;

img=imread('spine.tif'); % load an image
para=5; % filter parameter value

f = double(img); % change the image to double

[m n]=size(f); % size of the image
J0 = f;

for i=3:m-2
for j=3:n-2
J0(i,j) = (-8*f(i,j))+(1*f(i-1,j))+(1*f(i+1,j))+(1*f(i,j-1))+(1*f(i,j+1))...
+(1*f(i-1,j-1))+(1*f(i+1,j+1))+(1*f(i-1,j+1))+(1*f(i+1,j-1));
end
end

% Apply Laplacian filter
I1 = f .* (para-1);
J1 = J0 + I1;

subplot(1,2,1)
imshow(img);
title('Original Image')

subplot(1,2,2)
imshow(uint8(J1));
title('High-boost Image')

----------------------------------- SCREENSHOT OF CODE

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------------------------------------------------------ SAMPLE OUTPUT