cool, thanks. will see what i can do with it. -jo
On Wed, Jun 5, 2013 at 10:45 AM, Baptiste Pierrat < [email protected]> wrote: > Hi, > > If you want to do more tests on the images I used for profiling my sensor, > they are available here: > https://www.dropbox.com/sh/qxspc9nfbgqog7s/aW_EYQtYgg > > Regards > > Baptiste > > > On Mon, May 27, 2013 at 10:02 PM, johannes hanika <[email protected]>wrote: > >> thanks, not sure what kind of help i would ask for at this point. i >> noticed that your flattened histogram even with a slightly improved fitting >> procedure that i just tested (will push later, doesn't really help all that >> much so far) has a 2x noise std deviation for dark regions. some other >> cameras have way worse behaviour than that for brightnesses < 0.2, but >> maybe this is enough to confuse the algorithm. i fitted a gaussian to that >> error and instructed the wavelet denoiser accordingly, but so far results >> aren't a lot better than what we had before. >> >> i could get way better results using the equalizer and manually pulling >> up the threshold for the chroma channels (start from `chroma denoise' >> preset and push it to the extreme basically). >> >> i hope to do some more tests on that tomorrow. >> j. >> >> >> >> On Tue, May 28, 2013 at 6:21 AM, Baptiste Pierrat < >> [email protected]> wrote: >> >>> 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 >>>>>>>>>> >>>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >
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