finalterm2005

# finalterm2005 - Department of Electrical Engineering...

This preview shows pages 1–4. Sign up to view the full content.

1 Department of Electrical Engineering, Polytechnic University, Brooklyn Fall’ 05 EL512 --- DIGITAL IMAGE PROCESSING (I) Y. Wang Final Exam 1/5/06, 1PM-4PM Your Name: _______________________________________________ ID Number: _______________________________________________ Closed book. One sheet of notes (double sided) permitted. Write your solutions in the space provided next to the questions (use both sides if necessary). If you need extra space, you are probably on the wrong track! PROBLEM NO. FULL POINTS YOUR POINTS 1 10 2 15 3 15 4 10 5 10 6 20 7 20 8 (bonus) 10 Total Points 110

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2 1. (10 pt) Color representation (a) (2pt) suppose you have three separate projectors that can project red, green, and blue lights with different intensities. What will be the perceived color of the projected screen if all three projectors project lights at the same intensity? What will be the color if the red and green projectors project lights at the same intensity, and the blue projector is not projecting any light? (b) (2pt) What will be the color of the paint if you mix equal amount of cyan, magenta, and yellow paints? What will be the color if you mix equal amount of magenta and yellow paints? (c) (3pt) Suppose a particular color has the following R,G, B values: R=100,G=200, B=50. What will be the Y, I, Q values if you convert it to YIQ representation? Hint: The RGB <-> YIQ conversion formula is given below. (d) (3pt) Suppose you give a presentation using a LCD projector, and you notice that the color tone of the projected slides does not look right. It seems to be too yellowish. What do you think may be the problem? - - - = - - - = Q I Y B G R B G R Q I Y 703 . 1 106 . 1 0 . 1 649 . 0 272 . 0 0 . 1 621 . 0 956 . 0 0 . 1 , 311 . 0 523 . 0 211 . 0 322 . 0 274 . 0 596 . 0 114 . 0 587 . 0 299 . 0
3 2. (15pt) Consider a 2D image f(x,y)=cos(6 π x+4 π y). a) (3pt) Determine its Fourier transform F(u,v) and illustrate the spectrum (i.e., the impulses in the transform) in Fig. (a).

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern