related to image processing?

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aman 2014-3-12

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关闭： MATLAB Answer Bot 2021-8-20

hi, A threshold is defined as t=2^n, where n=floor(log2(max(A))); where A is the linear matrix. We would decrease n at each step (pass) by one. Each coefficient is tested against a threshold. Significance means the coefficient is greater than the threshold. For a newly significant coefficient it's sign bit is coded and the coefficient which is found significant in previous pass it's nth bit is sent.

The coefficients are the wavelet transformed values. suppose it is 8 so it's binary equivalent will be 1000. It's sign will be 1 and nth bit will be 1.By transmission I mean the output.Can any body help me in making this program?

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John D'Errico 2014-3-13

Please don't title every post of yours exactly the same "related to image processing". This is confusing and it does not help anyone else who may be able to learn from your post.

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Answer 1

Image Analyst 2014-3-12

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编辑：Image Analyst 2014-3-12

Can you give an example? I really don't understand what will happen with this: "I will transfer it's nth bit and the coefficient which is above t-1 in this check but was less than t, then I will transfer it's sign."

Let's say the number (pixel value) is 23 and the threshold is 15. What is the "nth bit"? What is "the coefficient"? How can you be above than t-1 (14) but less than t (15)? What is the sign you are taking- is it of the pixel value, the bit, or the threshold? And what is the sign anyway? Why is the sign not always positive??? And where are you transferring the sign to?