3.6 | 17 ratings Rate this file 115 downloads (last 30 days) File Size: 3.14 KB File ID: #8745

Image Compression Using Wavelets

by S.Thayammal Subburaj

18 Oct 2005 (Updated 18 Oct 2005)

No BSD License

Compression using wavelet transform which give better reconstruction.

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Description

Image compression using wavelet transform

*wavelet transform give better information about non-stationary signals in time domain

Required Products

Image Processing Toolbox

MATLAB release

MATLAB 6.1 (R12.1)

Tags for This File
Everyone's Tags	compression(2), image process, nonstationary signals, transform(2), wavelet
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Comments and Ratings (22)
01 Dec 2005	Vishal Raj	Nice code.But needs correct image file to be present in order for the code to work.But still good job.
31 Jan 2006	Omar Sharif	good....but should be more flexible
25 Aug 2006	samir soni
08 Oct 2006	jay nasir	nice program...can i ask...what the type of image that u used?what size?what is the correst image?
25 Oct 2006	MALIKARJUN DIQDIOP	IT IS EXCELLENT
24 Nov 2006	vk singh	good work shared
26 Nov 2006	dinesh yadav	vary good work go ahed
23 Jan 2007	jeyavim sherin	good work shared
23 Feb 2007	swati reddy
09 Apr 2007	raj malhotra	nice proj n very easy to understand
17 Apr 2007	Rafael B	It's a very nice project which helps to understand the different steps to compress an image with wavelets. Anyways I think some things do not make sense. Line 58: It makes no sense to give thr as input to the WPDENCMP function, the input has to be the wavelet coefficients, they have to be thresholded Line 68: The input for the wavelet inverse transformation is the original coefficient array c, which hasn't be altered, that means we just do a transformation and then an inverse transformation, no compression has been done. (therefore max(max(abs(re_ima-input_image))) = 0;) Anyways....very good for basic understanding!
30 Jul 2007	Essaki Muthu P	This is a good try, but it is not working with jpg files
05 Sep 2007	suvendu choudhury
06 Jan 2008	raju chimmi
23 Jan 2008	indra kandaswamy
27 Feb 2008	srinivassharma akella
06 Apr 2008	mahendra patel	very good
07 Apr 2008	sure geo
17 Apr 2008	subathra suba
17 Apr 2008	dyf ejee	fdjdfdvfm
30 Aug 2009	kartik srinivasan	very good.
21 Sep 2009	iyyakutti iyappan	nice program

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Tag Activity for this File
Tag	Applied By	Date/Time
compression	S.Thayammal Subburaj	22 Oct 2008 08:03:11
wavelet	S.Thayammal Subburaj	22 Oct 2008 08:03:11
transform	S.Thayammal Subburaj	22 Oct 2008 08:03:11
image process	S.Thayammal Subburaj	22 Oct 2008 08:03:11
nonstationary signals	S.Thayammal Subburaj	22 Oct 2008 08:03:11
transform	saran sharath	06 Jan 2009 22:54:19
compression	laihan laihan	12 Apr 2009 08:07:36

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