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Exercise
3: Image Pyramids |
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Due
date: 8/12/02 |
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Submission: In Pairs |
General Instructions
You can make use of any function in MATLAB.
· Hand in a typed report which includes
o a short theoretical description of the methods used.
o a short discussion of the results.
o The program code. Note that the code must be vectorized (i.e., using a minumum number of loops using built in matrix operators and functions) and properly documented.
o Printed results (Try to print the images on as few pages as you can, using the subplot function)
· Submit the exercise in class by the due date.
· If you have questions or comments, send mail to Tal or Eli.
In this exercise, you are required to build the 5-level image pyramids of the
pictures below.
1. Read the article by Burt and Adelson, 1983, in pdf format.
2. Write a program in MATLAB that displays:
a. the Gaussian pyramid for the color images.
b. the Laplacian pyramid for black & white images (stretch the image intensities for display purposes)
c. the
absolute value of the laplacian pyramid for black & white images (stretch
the image intensities also)
Notes:
· the gaussian filter is separable, hence it can be applied by 2 consecutive convolutions of the image with a 1D filter.
· for the convolution, you may use the FILTER2 or CONV2 MATLAB function.
· for color images, apply the pyramid construction to each band separately (R, G and B) and combine the 3 pyramid color bands to generate a single color display.
· display the each pyramid in the following way (placing at least two pyramids in each page):
The images: (you can download
the image files in one zip here, 354KB)
