# Forum: DSP problem in denoising image by using curvelet transform

 Author: Mohammad Ghabel rahmat (mbghr100) Posted on: 2016-11-19 03:32

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denoising algorithm by using Curvelet Transform:
1. Compute all thresholds for cuvelets;
2. Compute norm of curvelets;
3. Apply curvelet transform to noisy image;
4. Apply hard thresholding to the curvelet coefficients; and
5. Apply inverse cuvrelet transform to the result of step 4.

I do not understand step 2. In your opinion, Is not more appropriate
calculate norm of each curvelet coefficient after the transform image to
curvelet. If there is a scientific reason for step 2, please explain.
Maybe I just did not notice

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