[WM]: QIM Query

[mehul@scet.ac.in]

Dear All,
I am trying to make a quantization table adaptive for the QIM implementation and in the process I am trying following

Using DWT band split the images. For images of various texture I am splitting them in 4 bands. It was observed that for LH,HL and HH
band the histogram has maximum value near zero. So I have decided to do the following

1)Fit the curve to the histogram
2)From the curve try to derive the quantization matrix.
3)The derivation of quantization matrix will be through experimentation process. I will start with value of 16 as (0,0) element.
Have a quantization step size of 1 with next element will 17 and so on. This I will be doing in Zig Zag Fashion.
4)Compress and decompress the image using this Matrix.
5)Plot the histogram and see that it fits the original curve.
6)Repeat the process till we meet the desired curve.


Kindly let me know if I am on right path


Mehul



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