Well I did the profiling for my camera and it's currently this one that is used in the code (git master). I took great care in doing this correctly, I did 4 profiles and averaged the results.
Here is the raw file from the previous example if you want to test: https://www.dropbox.com/s/iqb04gly913vmfx/20130429_0041.ARW The problem for me is not only the green pixels but also the bigger cross-shaped blue and red dots. Isn't that somehow related to the demosaicing process? Thank you for helping with that. On Mon, May 27, 2013 at 1:27 PM, johannes hanika <[email protected]> wrote: > 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>>
------------------------------------------------------------------------------ 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
