hm. that looks reasonable. very surprising that those green pixels still stay in the color buffer. maybe the profiling doesn't match your particular camera model? maybe the profile was a little off for that particular iso value, or maybe there is some variance between individual sensors for sony cams?
i can try and re-profile that particular raw and see if there are any differences to the data we have if you want. j. On Mon, May 27, 2013 at 12:14 PM, Baptiste Pierrat < [email protected]> wrote: > [image: Inline image 1] > > > On Mon, May 27, 2013 at 12:12 PM, johannes hanika <[email protected]>wrote: > >> what are the white balance coefficients for that image? >> >> >> On Mon, May 27, 2013 at 11:57 AM, Baptiste Pierrat < >> [email protected]> wrote: >> >>> Hello, >>> >>> I want to second this problem. >>> >>> I have a Sony Alpha 57 and have a lot of trouble with remaining bright >>> color dots after denoising. My usual denoising tools for iso>800 are : >>> 1. Chroma denoise: profiled denoising with wavelets, blend with color, >>> then >>> 2. Luma denoise: profiled denoising with non-local means, blend with >>> lightness >>> >>> Here is an example with an iso 3200 sample: >>> original: http://minus.com/lU783RXDLcLH7 >>> chroma denoised: http://minus.com/lBe1kgj6o5aoP >>> chroma and luma denoised: http://minus.com/lbqRsDO5q4E617 >>> detail after export: http://minus.com/lCLmKR1s2vh5a >>> >>> Green, red and blue larger dots remain. Also notice as chroma denoising >>> does not work well for green color. As suni, this problem is partially >>> solved by using the color smoothing option in demosaic but the image is >>> slightly blurred. >>> >>> Thanks! >>> >>> >>> On Mon, May 27, 2013 at 11:25 AM, johannes hanika <[email protected]>wrote: >>> >>>> you left in all the luma noise in your lightroom comparison image. to >>>> do that in darktable, use `color' blend mode in the profiled denoising >>>> module. you may want to use the wavelet method, it is usually a little more >>>> effective against color noise. >>>> >>>> j. >>>> >>>> >>>> On Mon, May 27, 2013 at 11:21 AM, suni <[email protected]> wrote: >>>> >>>>> Hi all, >>>>> >>>>> I'm fighting the high ISO noise of my A550 camera, but I still cannot >>>>> achieve the reasonable output. Even the new profiled denoise filter >>>>> doesn't >>>>> help much. >>>>> >>>>> Below is the example of the ISO12800 image. I do not take images on >>>>> such high ISO but it makes this problem more visible for this purpose. >>>>> This >>>>> behaviour may be observed even at ISO1600 and higher. The RAW image below >>>>> is totally unaltered RAW for comparison opened side by side in dt and in >>>>> Lt. Only the base curve is applied at dt side because otherwise the image >>>>> looks very ugly and not comparable to the Lt from the visual point of >>>>> view. >>>>> >>>>> Link to unaltered RAW image: >>>>> https://dl.dropboxusercontent.com/u/9454436/sony_noise/raw_not_altered.jpg >>>>> >>>>> As you can see the image looks almost the same in both tools. Just >>>>> note the bright red dots. The Lt shows less of them especially on the >>>>> right >>>>> side of the paper Christmas tree. These red dots cannot be removed by any >>>>> of the dt denoising filters unless the image becomes almost blurred. >>>>> >>>>> Now see the next image below. This shows what can be achieved in dt >>>>> and in Lt. While only activating the luma and chroma denoise sliders in Lt >>>>> produces the acceptable and (to me) pretty usable output where only some >>>>> luma noise remains, with dt I cannot achieve similar output by no means. >>>>> The most strange finding is that no one from all the denoising filters >>>>> available in dt can remove these bright red dots unless it is pushed to >>>>> not >>>>> acceptable high strength producing the blurred image. The only strategy I >>>>> found to be somehow working here is as follows: >>>>> 1) turn off the sharpen filter >>>>> 2) apply the hot pixel filter at its maximum strength >>>>> 3) set the color smoothing of the demosaic filter to maximum >>>>> >>>>> These three steps do remove the bright red dots. But the image still >>>>> suffers of the high chroma noise. The only possible way to get rid of it >>>>> while maintaining the image sharpness at the level comparable to the Lt I >>>>> found is the profiled denoise set to less than default strength. But as >>>>> you >>>>> can see there still remain far more chroma noise than in the Lt case. >>>>> >>>>> Link to altered RAW image: >>>>> https://dl.dropboxusercontent.com/u/9454436/sony_noise/raw_altered.jpg >>>>> >>>>> Because I've got to that point I didn't know what to do more, >>>>> I profiled my camera. But even though my profile seems to me to be a bit >>>>> better than the one packed with dt, it produces no visible difference >>>>> here. >>>>> >>>>> I would like to ask all of you experienced in fighting the high ISO >>>>> noise for your experiences and recommendations. It would be great to get >>>>> to >>>>> know that the problem is in between the chair and the keyboard, not in the >>>>> excellent dt tool!:-) >>>>> >>>>> If someone is interested, the original RAW image can be found here: >>>>> https://dl.dropboxusercontent.com/u/9454436/sony_noise/DSC09533.ARW >>>>> >>>>> >>>>> Thank you in advance for any reply! >>>>> >>>>> Suni >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> Try New Relic Now & We'll Send You this Cool Shirt >>>>> New Relic is the only SaaS-based application performance monitoring >>>>> service >>>>> that delivers powerful full stack analytics. Optimize and monitor your >>>>> browser, app, & servers with just a few lines of code. Try New Relic >>>>> and get this awesome Nerd Life shirt! >>>>> http://p.sf.net/sfu/newrelic_d2d_may >>>>> _______________________________________________ >>>>> Darktable-users mailing list >>>>> [email protected] >>>>> https://lists.sourceforge.net/lists/listinfo/darktable-users >>>>> >>>>> >>>> >>>> >>>> ------------------------------------------------------------------------------ >>>> Try New Relic Now & We'll Send You this Cool Shirt >>>> New Relic is the only SaaS-based application performance monitoring >>>> service >>>> that delivers powerful full stack analytics. Optimize and monitor your >>>> browser, app, & servers with just a few lines of code. Try New Relic >>>> and get this awesome Nerd Life shirt! >>>> http://p.sf.net/sfu/newrelic_d2d_may >>>> _______________________________________________ >>>> Darktable-users mailing list >>>> [email protected] >>>> https://lists.sourceforge.net/lists/listinfo/darktable-users >>>> >>>> >>> >> >
<<image.jpeg>>
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