January 29, 2004
ECEC 453 Image Processing Architectures
Exam I solution
1. A digital camera captures 640x480 pixel color images. It has a 256 MByte flash memory.
(a) How many images can be stored in the memory if no compression is used?
Answer: A color p
DREXEL UNIVERSITY
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
ECE-C 490 Image Processing Architectures
Winter, 2004
Homework 2 solution
Problem 1. We have a binary source with p0 = 0.1.
(a) Compute the Entropy.
Answer: H = 0.469
(b) What is the aver
DREXEL UNIVERSITY
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
ECE-C 490 Image Processing Architectures
Winter, 2003-4
Homework 1 Solution
Problem 1. An 8 by 10 color photograph is scanned at 100 dpi. The RGB components of
each pixel are encoded with
ECEC 453 Image Processing Architectures
February 26, 2004
Exam II
Open book and notes
No computer use!
There are five problems. Each problem has the same weight
Problem 1. A 2x2 DCT produces 4 DCT coefficients with variances given in the table below.
We n
DREXEL UNIVERSITY
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
ECE-C 490 Image Processing Architectures
Winter, 2002-03
Homework 3. Solution
The MATLAB files for this are in HW3.zip
1. We take 4 element blocks of pixels in an image and transform them
DREXEL UNIVERSITY
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
ECEC 453 Image Processing Architectures
Winter, 2003-04
Homework 4.
Due Thursday, February 15
Some supporting data are in HW4.zip
1. The table below to the right shows a set of quantized
ECE-C 490 Image Processing Architectures
Practice Final
Winter 2002-3
Do any six (6, VI, 203) problems
All problems have the same weight
Please keep your answers short and to the point.
Problem 1. A source has three symbols: a, b, c, with probabilities p(
ECE-C 490 Image Processing Architectures
Practice Final
Winter 2002-3
Do any six (6, VI, 203) problems
All problems have the same weight
Please keep your answers short and to the point.
Problem 1. A source has three symbols: a, b, c, with probabilities p(
ECEC 453 Image Processing Architectures
2004
Practice Exam II
Problem 1. (20%) A HDTV system uses a 1440x1152 format with 60 frames per second and
4:2:0 color subsampling. MPEG 2 compression is used.
(a) How many DCT blocks are required for one Y frame?
(
ECEC 453 Image Processing Architectures
Practice Exam II solution
Open book and notes
Problem 1. (20%) A HDTV system uses a 1440x1152 format with 60 frames per second and
4:2:0 color subsampling. MPEG 2 compression is used.
(a) How many DCT blocks are req