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LOSSLESS DATA COMPRESSION ALGORITHMS


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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rithm.
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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
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rm
2-D Wavelet Transform via Separable Filters
2-D Example
Subband Coding Techniques

 General coding approach
– Allocate different bits for coeff. in different frequency bands
– Encode different bands separately
– Example: DCT-based JPEG and 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 )
 S..................[:=> Show Contents <=:]



FRACTAL COMPRESSION ppt


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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ctals are used.
High compression rate.

Overview
Why Fractal Image Compression

Fractals

Mathematical Background

How does it work?

Examples

Possible Improvements

Why fractal compression
Different type of compression scheme worth exploring
Takes advantage of similarities within an image
Advanced detail interpolation
High theoretical compression rates
Fast decompression times

fractals
Term coined by Mandelbrot.
Natural objects - fractals include clouds, mountain ranges, cauliflower.

Mandelbrot set---

dimension
A point has ..................[:=> 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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entification is getting wide acceptance in the networked society, replacing passwords and keys due to its reliability, uniqueness and the ever in-creasing demand of security. Common modalities being used are fingerprint and face but for face authentication people are still working with the problem of pose and illu-mination invariance where as fingerprint does not have a good 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, r..................[:=> 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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nt 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 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 clear explanation about the topic . And also could u provide me code for this topic along with explanation

Thank..................[:=> 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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e a collection w1, w2, ¦ we can decode the image by estimating Xw. It is to be noted that the choice of the metric used affects the contractivity of the transformation and the fidelity of the system.
PARTITIONING OF IMAGES
The basic idea behind partitioning of images is to first partition the image by some collection of ranges Ri, then for each Ri seeek from some collection of image pieces a Di that has a low rms error when mapped to Ri. If we know Ri and Di then we can determine the remaining co-effi..................[:=> 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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the use of the decoder. This, combined with the fact that our data items are pixel values, which are normally nonnegative, suggests a way to choose the basis vectors. The first vector, the one that produces c1, should consist of positive, perhaps even identical, values. This will reinforce the nonnegative values of the pixels. Each of the other vectors should have half its elements positive and the other half, negative. When multiplied by nonnegative data items, such a vector tends to produce a small value. Recall that we can interpret the basis vectors as tools for extracting features from th..................[:=> 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 Techniques..................[:=> Show Contents <=:]



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