How to select 100 highest coefficient from Curvelet subband image
显示 更早的评论
Input image size is 256x256 How to calculate number of levels required for this image size. How to select 100 highest coefficient from Curvelet subband image.
采纳的回答
Thomas Koelen
2015-5-8
There are a couple ways you can do this depending on how you want to deal with repeated values. Here's a solution that finds indices for the 5 largest values (which could include repeated values):
[sortedValues,sortIndex] = sort(A(:),'descend');
maxIndex = sortIndex(1:5);
Here's a solution that finds the 5 largest unique values, then finds all elements equal to those values:
sortedValues = unique(A(:));
maxValues = sortedValues(end-4:end);
maxIndex = ismember(A,maxValues);
2 个评论
Prema
2015-5-8
ikram loued
2020-9-16
hi , please who knows how can i get the coefficients of curvelet transform from an image ?
更多回答（1 个）
Durgesh Naik
2015-7-15
0 个投票
actually im applied 3 level curvelet decomposition but its not working pls reply..(See paper)
类别
在 帮助中心 和 File Exchange 中查找有关 Denoising and Compression 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
