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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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igital form. Some of the data indeed to be stored without any loss.
If the total number of bits required to represent the data before compression is Bo and the total number of bits required to represent the data after compression is b1. Then we define the compression ratio as
Compression ratio=Bo\B1
Basics of information theory: According to the famous scientist Claude e.shannon,of bell labs,the entropy n of an information source with alphabets S={s1,s2……………….sn} is defined as:
n=H(s)=£n I=1 Pi LOG²1\PI
..................[:=> 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 ,
s 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 different level: capture transitions of different frequency bands
u on the same level: captu..................[:=> 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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lso comes.

Encoding - How does it work?
Take a starting image and divide it into small, non-overlapping, square blocks, typically called “parent blocks”.

Divide each parent block into 4 each blocks, or “child blocks.”

Compare each child block against a subset of all possible overlapping blocks of parent block size.

Determine which larger block has the lowest difference, according to some measure, between it and the child block.

Calculate a grayscale transform to match intensity levels between large block and child block precisely.
Upper left corner child block,..................[:=> 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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is to succeed in the future it should have the traits like unique-ness, accuracy, richness, ease of acquisition, reliability and above all user acceptance. Palm print based personal identi-fication is a new biometric modality which is getting wide acceptance and has all the necessary traits to make it a part of our daily life. This paper investigates the use of palm print for personal identification using combination of dif-ferent wavelets. Palmprint not only has the unique informa-tion available as on the fingerprint but has far more amount of details in terms of principal lines, wrinkles an..................[:=> 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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r significant by using zero tree which is defined in the embedded zero tree wavelet algorithm...................[:=> 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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could i get a cle..................[:=> 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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y-by-day. The most notable of these is the fractal scheme. It provides endless scope and is under research. Further new partitioning schemes are also being developed. Another recent advance in this field has been through wavelet transformations. This is a highly efficient method based on the Fourier representation of an image. This scheme comes as a competitive development to the fractal approach.

The power of fractal encoding is shown by its ability to outperform the DCT, which forms the basis of the ..................[:=> 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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ls with smallest probabilities are selected, added to the top of partial tree, deleted from the list and replaced with an auxiliary symbol representing both of them. When the list is reduced to just one auxiliary symbol the tree is complete. The tree is then traversed to determine the codes of the symbols.
The huffman method is somewhat similar to shannon fano method. The main difference between the two methods is that shannon fano constructs its codes from top to bottom while huffman constructs a code tree from bottom up.
This is best illustrated by an example. Given five symbols with ..................[:=> 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 Image Compression T..................[:=> Show Contents <=:]

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