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## LOSSLESS DATA COMPRESSION ALGORITHMSPosted 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 | data compression and decompression seminar topic ,
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abs,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 =-£ 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-f.................. [:=> Show Contents <=:] | |||

## Wavelet Based Image CodingPosted 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 ,
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early wavelet coding Some difference between subband coding and early wavelet coding ~ Choices of filters – Subband filters aims at (approx.) non-overlapping freq. response – Wavelet filters has interpretations in terms of basis and typically designed for certain smoothness constraints (=> will discuss more ) Shortcomings of subband coding – Difficult to determine optimal bit allocation for low bit rate applications – Not easy to accommodate different bit rates with a single code stream – Difficult to encode at an exact target rate Smoothness Conditions on Wavelet F.................. [:=> Show Contents <=:] | |||

## FRACTAL COMPRESSION pptPosted 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 | fractal ppt ,
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ional dimension.Mathematical backgroundStarted with Michael Barnsley, and refined by A. Jacquin Try and find a set of transforms that map an image onto itself. The key is the Collage Theorem States that if the error difference between the target image and the transformation of that image is less than a certain value the transforms are an equivalent representation of the image. Iterated function systemsAn IFS is the collection of contractive affine transforms Partitioned iterated function systemProposed by Arnaud Jacquin (1988). Image is not the colla.................. [:=> Show Contents <=:] | |||

## Wavelet Based Palmprint Authentication SystemPosted 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 | wavelet based image fusionwavelet based palmprint authentication system ,
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od psychological effect on the user because of its wide use in crime investigations. If any
biometric modality 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-ti..................[:=> Show Contents <=:] | |||

## A Digital Watermark Based on The Wavelet Transform and its Robustness on ImagePosted 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 | digital watermarking applications ,
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ing 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 transform. We classify
wavelet coefficients as insignificant or significant by using zero tree whi..................[:=> Show Contents <=:] | |||

## study on huber fractal image compressionPosted 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 | fractal image enlargement ,
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could i get a clear explanation about the topic . And also could u provide me code for this topic
along wi..................[:=> Show Contents <=:] | |||

## fractal image compression seminar reportPosted 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 | fractal image compression matlab ,
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rst partitioned to several domain blocks and iterative function systems are formed of
the different parts of the image to yield the output image. AN ILLUSTRATIVE EXAMPLE Suppose we are dealing with a 256x256 pixel image in which each pixel can be one of 256 level of gray. Let R1, R2,Â¦.. be the 8x8 pixel non-overlapping subsquares of the image and let D be the collection of all 16x16 pixel (overlapping subsequences of the image). For each Ri search through all of D to find a Di E D that looks like the image.................. [:=> Show Contents <=:] | |||

## Data Compression TechniquesPosted 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 | data compression techniques seminar report ,
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e. Gray codes:- An image compression method that has been developed specifically for a certain type of image can sometimes be used for other types. Any method for compressing bi-level images, for example, can be used to compress grayscale images by separating the bitplanes and compressing each individually, as if it were a bi-level image. Imagine, for example, an image with 16 grayscale values. Each pixel is defined by four bits, so the image can be separated into four bi-level images. The trouble with this approach is that it violates the general principle of image compression. Imagine two.................. [:=> Show Contents <=:] | |||

## Video Image Compression TechniquesPosted 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 | digital video image compression ,
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I want the report on Video Image Co..................[:=> Show Contents <=:] |

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