IMAGE COMPRESSION & RECONSTRUCTION OF IMAGES

PROGRAM DECOMPOSE IMAGE,COMPRESS IT, RECONSTRUCTION IS PERFORMED.

Description

This program compress and recostruct using wavelets. We can select level of decomposition(here maximum 4 levels are given) of images using selected wavelet.
For eg:-wavelets can be haar, db1, db2,dmey...............
Decomposition can be viewed in figure.
(Please note that select 256X256 image for better result.)
Then compression can performed,
PERFL2 give compression score.
Then reconstruction can be performed.
Each decompsition we can choose different threshold values.
For each threshold value we can calculate mse,psnr,pq(picture quality),
bit ratio etc. To get pq install pqs function .

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
Wavelet Based Image Compression implementation using SOFM

• Required Products: Image Processing Toolbox; Wavelet Toolbox
• MATLAB release: MATLAB 7.1.0 (R14SP3)
• Other requirements: pqs function

[Rahul Raj]

Excellent project that saved my friend!

[ABDESLAM BOUHOUIA]

VERY GOOD

[tas jack]

good

[giri vasan]

 

[hanan yaseen]

dear sir
can you explain your work to me about this algorithm
i mean which type of algorithms is this? what is the mechanisum of the commands work?
because all the papers of compression using wavelet talking about SPIHT,EZW and so on
if i use your algorithm in my project how can i descripe it
i hope you answer me very soon
and thank you

[parul sahu]

 

[Yeasin Razib]

Dear sir,

           i have run your code in the matlab. it helps me much in my project. now i want to calculate the compression ratio from the compresed image from your code. how to do that? i cant understand the br(bit rates). is it possible to find the approximate compression ratio without the encoding and writting it into a file? if so, then please tell me the procedure. it will be very much helpful for me.
Thanks
Razib

[nor azah]

i have run your code in the matlab. it helps me much in my project. now i want to calculate the compression ratio from the compresed image from your code. how to do that? i cant understand the br(bit rates). is it possible to find the approximate compression ratio without the encoding and writting it into a file? if so, then please tell me the procedure. it will be very much helpful for me.
Thanks-azah

[bhawna garg]

hello sir

i run ur code in matlab. it is giving error in fwrite coz it is not locating pqs.exe, pic1.pqs & pic2.pqs. plz tell me from where shoud i get these.
regards
bhawna

[rr rrr]

very good

[anil kumar]

i have run your code in the matlab. it helps me much in my project. now i want to calculate the compression ratio from the compresed image from your code. how to do that? i cant understand the br(bit rates). is it possible to find the approximate compression ratio without the encoding and writting it into a file? if so, then please tell me the procedure. it will be very much helpful for me.
Thanks-azah
please tell me how to get compression ratio

[qwd dsda]

adasd

[preeti chauhan]

good

[Adi Navve]

Hi,

I cannot find the executable needed for the code to work (pqs.exe) anywhere on the web. Do you have it? If so, could you please send it to me?