[curvelab-list] CurveLab 2.1: curvelets for mirror-extended images

[Laurent Demanet]

Dear CurveLab users,

The CurveLab toolbox has been upgraded to version 2.1. We have included a 
version of the curvelet transform that handles image boundaries by mirror 
extension instead of periodization, at a computational complexity 
comparable to the standard FDCT. The result is that boundary curvelets are 
now reflected back into the image, instead of being wrapped around by 
periodicity, in the spirit of wavelets on intervals. Switching to the new 
variant may improve sparsity in cases where the image presents 
strong contrast discontinuities across periodized edges.

A new paper explains the construction of ME curvelets. The Matlab files 
for the new variant are in the directory mecv/. The toolbox can be 
downloaded from

http://www.curvelet.org

A new version of the wave atom transform for mirror-extended images is 
also available. Papers and software on wave atoms are available at the new 
webpage

http://www.waveatom.org

Enjoy, and please report bugs/feedback by email!

Laurent Demanet and Lexing Ying.