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IMAGE COMPRESSION USING DISCRETE COSINE TRANSFORM


Posted by: seminar class
Created at: Tuesday 19th of April 2011 11:29:28 PM
Last Edited Or Replied at :Monday 07th of November 2011 10:31:55 PM
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s useful in processing one-dimensional signals such as speech waveforms. For analysis of two dimensional (2D) signals such as images, we need a 2D version of the DCT data, especially in coding for compression, for its near-optimal performance. JPEG is a commonly used standard method of compression for photographic images. The name JPEG stands for Joint Photographic Experts Group, the name of the committee who created the standard. JPEG provides for lossy compression of images. Image compression is the application of data compression on digital images. In effect, the objective is to reduce redu..................[:=> Show Contents <=:]



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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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
=-£ n I=1 Pi LOG²PI
Where ..................[:=> 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
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ints
(=> 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 Filter
– Ensure the low band coefficients obtained by recursive filtering can provide a smooth approximation of the original signal
Embedded Zero-Tree Wavelet Coding (EZW)
 Modern” lossy wavelet coding exploits multi-resolution and self-similar nature of wavelet decomposition
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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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fractals
Fractals are geometrical objects with fractional dimension.

Mathematical background
Started 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 systems
An IFS is the collection of contractive affine transforms

Partitioned iterated function system[..................[:=> 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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ure extraction has motivated us to investigate the effectiveness of using combination of multiple wavelets for the textural analysis of palmprint.
..................[:=> 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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ng need to manage and protect the illegal duplications a, solution to this problem, a digital watermark technology is now drawing the attentions ..................[:=> 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..................[:=> 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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ould also like to thank my seminars guide and Staff in-charge
Asst. Prof. Gylson Thomas. (Department of EEE) for his invaluable advice and wholehearted cooperation without which this seminars would not have seen the light of day.
Gracious gratitude to all the faculty of the department of EEE & friends for their valuable advice and encouragement.


CONTENTS
1. INTRODUCTION 1
2. OVERVIEW OF IMAGE COMPRESSION 2
3. FRACTALS 4
4. PROPERTIES OF FRACTALS 5
5. FRACTAL IMAGE COMPRESSION 6
6. ITERATED FUNCTION SYSTEM 9
7. SELF SIMILARITY IN IMAGES 10
8. PAR..................[:=> 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..................[:=> Show Contents <=:]



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