I don't get great results with the de-noising modules. I can smooth over
the noise with the wavelet denoising,
but that also looses a lot of details.
But I also just wanted to understand the equalizer. It seems I don't
really understand what it does to the wavelets
if I can't remove very high frequency noise. Maybe I should read the
paper? But first I wanted to know
if that was expected or if there was some easy explanation for it.
On 04/13/2017 04:53 AM, Rob Z. Smith wrote:
Why would you want to use the equalizer? I mean, if you have a type of noise
that the dedicated de-noising modules are suitable for and more effective for
than the (more general purpose) equalizer, why not use them?
Rob.
-----Original Message-----
From: Andy [mailto:[email protected]]
Sent: 13 April 2017 03:53
To: darktable-users
Subject: [darktable-user] Can't remove high frequency chroma noise with
equalizer
Hi.
I'm trying to understand the equalizer better.
I have an image shot at very high ISO:
https://www.dropbox.com/s/gkrcxshydk0slfc/DSC04403.ARW?dl=0
I want to denoise it using the equalizer.
But no matter how high I drag the denoising curve, there is still high
frequency noise in the image:
https://www.dropbox.com/s/r7rxhgkzapdz72e/chroma_noise.png?dl=0
Is that expected? I would have thought that I can completely remove this noise.
Using the profiled denoising with wavelets, I can easily smooth over it.
I thought
the equalizer could do the same.
I'm using 2.2.4
Thanks!
Andy
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