I'm currently working on a new tool for Image Editor and Batch Queue Manager to perform camera sensor noise using Wavelets. The tool works into YCrCB color space and support 16 bits color depth.
The tool core code is based on Gimp Wavelets De-noise tool. I ported code to C++/Qt4 and fixed some memory management bugs and improved a little bit the processing loop to be be faster.
Code is not yet finalized, especially in settings view.
This is a companion discussion topic for the original entry at https://www.digikam.org/news/2009-11-23_new_wavelets_noise_reduction_tool_under_construction_for_1.0.0_release/