Lab5 - EE440 Introduction to Digital Imaging Systems Lab. 5...

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EE440 – Introduction to Digital Imaging Systems Lab. 5 Solve the problems using your own Matlab programs. Unless specified as valid in the problem, do not use advanced image editing commands such as imadjust , medfilt2 , histeq , edge, etc ... 1. (25 %) Load image 5_1.asc as f1(x,y). Take the 1-D DFT of this image, first row-wise 1-D DFT and followed by column-wise 1-D DFT to create the resulting F1(u,v) . You can display both |F1(u,v)| and also log(|F1(u,v)|) to see the difference. Compare your results with that of directly applying 2-D FFT (i.e., fft2). Repeat the above procedures by performing the 2-D DFT via 1-D DFT, while starting with column-wise 1-D DFT, followed by row-wise 1-D DFT. Hint: you find the transpose operation in Matlab makes your steps much easier. 2. (25 %) Load image 5_1.asc as f1(x,y) and image 5_2.asc as f2(x,y). Take the DFT of both images to create F1(u,v) and F2(u,v). Interchange the phase components of F1(u,v) and F2(u,v) and perform IDFT on F1 and F2. Submit the original images and the two resulting images. What is your observation on the
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This note was uploaded on 07/08/2011 for the course EE 440 taught by Professor Jenq-nenghwang during the Spring '11 term at University of Washington.

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Lab5 - EE440 Introduction to Digital Imaging Systems Lab. 5...

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