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Posted by: seminar class
Created at: Tuesday 22nd of March 2011 06:20:01 AM
Last Edited Or Replied at :Thursday 01st of March 2012 12:12:16 AM
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=1 Pi LOG²1\PI
=-£ n I=1 Pi LOG²PI
Where pi is the probability that symbol si in S will occur.
ENTROPY: Entropy is measure of the disorder of a system.
There are three types of coding methods. Those are
1. run length coding
2. variable length coding
3. fixed length coding
Run length coding is simplest form of data compression. In the variable-length coding we are using Shannon-fano algorithm and haffman coding algorithm.Shannon-fano algorithm is a top down approach, and the haffman coding algorithm is a bottom up ..................[:=> Show Contents <=:]

Wavelet Based Image Coding

Posted by: seminar class
Created at: Tuesday 22nd of February 2011 11:37:51 PM
Last Edited Or Replied at :Tuesday 22nd of February 2011 11:37:51 PM
wavelet based image compression ppt , wavelet based image compression seminar topic, sub band coding , wavelet coding seminar ppt, seminar topics based on wavelets ,
d out in last lecture
– Subband and Wavelet based compression
u Exploiting the structures between coefficients for removing redundancy
Wavelet Transform for Image Compression
 ENEE631 emphasis
– Focus on conceptual aspects related to image compression
– Wavelet is also useful for denoising, enhancement, and image analysis
– Build upon filterbank and subband coding from ENEE630
(For more in-depth info. on wavelet: wavelet course offered in Math Dept.)
 K-level 1-D wavelet/subband decomposition
– Successive lowpass/highpass filtering and downsampling
u on diff..................[:=> Show Contents <=:]


Posted by: seminar surveyer
Created at: Thursday 27th of January 2011 12:48:10 AM
Last Edited Or Replied at :Thursday 27th of January 2011 12:48:10 AM
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on of the image.

Iterated function systems
An IFS is the collection of contractive affine transforms

Partitioned iterated function system
Proposed by Arnaud Jacquin (1988).
Image is not the collage of copies of entire image but of smaller copies of itself.
For encoding of images.
It is divided into domains and ranges.

Binary image
Binary images can be represented using simple affine transforms because there are only two values.

Colour images
Color images are combination of grayscale images. In addition depth also comes.

Encoding - How doe..................[:=> Show Contents <=:]

Wavelet Based Palmprint Authentication System

Posted by: projectsofme
Created at: Friday 08th of October 2010 11:32:53 PM
Last Edited Or Replied at :Wednesday 13th of June 2012 05:40:17 AM
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ndigenously made image acquisition sys-tem. 500 palm print obtained from 50 users with 10 samples each have been collected over a period of six months and have been evaluated for the performance of the proposed system. The experimental results obtained from the data have demon-strated the feasibility of the proposed system by exhibiting Genuine Acceptance Rate, GAR of 97.12%.


Biometrics based personal identification is getting wide acceptance in the networked society, replacing passwords and keys due to its reliability, uniqueness and the ever in-creasin..................[:=> Show Contents <=:]

A Digital Watermark Based on The Wavelet Transform and its Robustness on Image

Posted by: project topics
Created at: Sunday 25th of April 2010 11:00:43 PM
Last Edited Or Replied at :Wednesday 19th of December 2012 12:18:05 AM
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lem, a digital watermark technology is now drawing the attentions a new method of protecting copyrights for digital data. In this paper, we present two methods of digital watermark for image signals based on the wavelet tran..................[:=> Show Contents <=:]

study on huber fractal image compression

Posted by: selvi
Created at: Friday 02nd of April 2010 06:12:10 AM
Last Edited Or Replied at :Friday 02nd of April 2010 06:27:20 AM
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coul..................[:=> Show Contents <=:]

fractal image compression seminar report

Posted by: applied electronics
Created at: Tuesday 29th of December 2009 04:18:36 AM
Last Edited Or Replied at :Thursday 16th of February 2012 12:53:20 AM
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f the method.
Magnification of the original shows pixelation; the dots that make up the image are clearly discernable. This is because of the magnification produced.
Standard image compression methods can be evaluated using their compression ratios : the ratio of the memory required to store an image as a collection of pixels and the memory require to store a representation of the image in compressed form.
The compression ratio of fractal is easy to misunderstand since the image can be decoded at any scale. In p..................[:=> Show Contents <=:]

Data Compression Techniques

Posted by: electrical engineering
Created at: Tuesday 29th of December 2009 02:43:47 AM
Last Edited Or Replied at :Thursday 01st of March 2012 12:11:42 AM
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e the frequency of occurrence of each symbol.
The foresaid techniques that is the Huffman and the Shannon Fano techniques rarely produces the best variable size code. The arithmetic coding overcomes this problem by assigning one code to the entire input stream instead of assigning codes to the individual bits.
The main steps of arithmetic coding are
1. start by defining the current interval as [0,1)
2. repeat the following two steps for each symbol 's' in the input stream.
2.1) divide the current interval into subintervals whose sizes are proportional to the probability of the symbol. ..................[:=> Show Contents <=:]

Video Image Compression Techniques

Posted by: vissu_52
Created at: Monday 21st of December 2009 03:01:11 AM
Last Edited Or Replied at :Friday 24th of February 2012 11:35:37 PM
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I want the report on Video..................[:=> Show Contents <=:]

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