I´m willing to help if you want more samples or else (I´m not a good coder but I have some basic knowledge).
On Mon, May 27, 2013 at 2:50 PM, johannes hanika <[email protected]> wrote: > hm. if anything your sensor is cooler now and has less constant noise > added on top. the data in your image matches your previous measurements > very closely. i'll have to do some more digging. > > j. > > > On Mon, May 27, 2013 at 1:46 PM, Baptiste Pierrat < > [email protected]> wrote: > >> 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>>
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