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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