darktable

we could gain some speed for multiple wavelet-based plugins, if the transform and the inverse transform would only have to be done once.

so create two plugins waveletin/waveletout (along the lines of colorin/colorout), which do wavelet decomposition and synthesis.

local contrast, denoise, bloom, etc could then all use the common wavelet decomposition.

this is a task, as it involves some uncertainty if it would actually be useful/feasible at all, or if parameters of the wavelet decomposition would be affected by the plugins, so re-use would be impossible.