Describe what the following MATLAB code does. The original function name has bee
ID: 1766035 • Letter: D
Question
Describe what the following MATLAB code does. The original function name has been replaced by XXX. Specify where relevant which expressions in the textbook have been implemented, if any. 20 points clc: clear all: close all; [filename , filterindex] uzgetf-wei pathname , JPEGpg) = .. . bmpWindows Bitmap ( .bmp)'; . . . Figures (*.fig)': '*. ,'All Files (*.*)'1, .. . Choose image (s) to be processed', .. . Multiselect"off"): if filterindex-0, break; end filename-cellstt (filename) 1m2= imread (horzcat (pathname, char (filename)) ); 1m1=rgb2gray (1m2) ; ims-im2 double (1m1) ; nml-size(im3): ci-0 h = waitbaro, 'Calculating XXX please wait '); 1-0 : 1 : m-1 for for k=0 : 1: n-1 f x=0 : 1 : n-1 for r y=0 : 1:n-1 c1=0 ; end waitbarll / m): end close (h) imshaw ima):title ( 'XXX plot'; figure imshow (1og (abs (ims)-1 5]): colormap (jet): selerbaititle'absolute value of XXx plot)Explanation / Answer
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The given code first asks the user to choose an image file of choice. It then converts the color image to greyscale using the command rgb2gray. In the main for loop, what it does is calculate the 2D Fourier Transform of the image. This is clearly evident since you can see that the final operation is multiplication by an exponential and summation. Once the transform has been done calculating, it is changed to a colormap to reflect the magnitudes of the transform. The absolute value is then plotted on a graph.