198:443 Digital Imaging and Multimedia

Spring 2008

Assignment 1

Due Date – in class: Tuesday Feb 19

Submission instruction:

- You need to submit a hard copy of your work including all the code you write and print out of the results.

- You also need to submit an electronic copy of your code. Zip all your code in one file and email it to the TA. Please note, the electronic submission is for the code only. Don’t include images.

- Late submission policy: 10% off the grade for each day late.

The images for this assignment are available at

ftp://ftp.cs.rutgers.edu/pub/elgammal/CS443/HW1

Install the current version of ImageJ on your computer and make yourself familiar with the built in functions (open, convert, edit, and save images, etc.)

In the following questions, the problems refer to exercises from the DIP text book.

[Q1 – 10pts] Pr 2.2 and 2.6

[Q2 – 10pts] Pr 4.2 - use the image Ireland-03gray.tif to test your code. Print the resulting cumulative histogram for this image.

[Q3 – 15pts] Problems 4.4 and 4.5 - Print the resulting histogram in each case.

[Q4 – 10pts] Pr 5.3 - use the image Ireland-03gray.tif to test your code. Print out the cumulative histogram and the modified version for that image. Also print the resulting images.

[Q5 – 15 pts]

a- Open the image flowers.tif using ImageJ.

b- Plot the R,G,B component histograms as well as the brightness histogram.

c- Replace the R and G components and visualize and print the resulting image.

[Q6 – 10pts] Write an ImageJ plug in that count the number of distinct colors in an image. Test your code on the image flowers.tif and report the result.

[Q7 – 20pts] In this question we are testing the geometric and chromatic aberrations we have studied. Use a cell phone camera or a web camera to capture an image that shows a geometric aberration and an image that shows a chromatic aberration. Mark the locations of the aberrations. Can you show the two types of aberrations in one image?