Hi I’m new here…i have EOS R7 mirrorless cam…in long exposures 8 sec, 15, or 30 sec i obtain hot pixels…red blue …in the same place…only in long exposures…at iso 100…what is the best profile demosaicing on rawtherapee or best tool for eliminate this pixels? Hot pixel filter tool?
When i fix the pixels…how i can export to a dng or cr3. raw file again for edit in lightroom for example?..or I’m wrong? Rawtherapee can’t export to DNG file? What alternative file format i can export in rawtherapee for edit after in lightroom for example? Tiff? Tiff keep all data like a cr3 file?
Please help.
Thanks.
Jordi
hi and welcome to the forum.
You can use the hot/dead pixel filter: https://rawpedia.rawtherapee.com/Preprocessing#Hot.2FDead_Pixel_Filter
or
You can use a dark fram/bad pixels list, which is detailed here: Dark-Frame - RawPedia
I know you asked about RT which is an excellent program. However, I use DT and hot pixels are handled so well in that program’s module. I trust RT has something as good. Hot pixels become a non event in the end. I too have the R7. Nice camera.
RawTherapee won’t export CR3 or DNG (and neither will darktable). RawTherapee is not a tool to ‘fix’ raw files, it’s a full-fledged raw developer with capabilities exceeding those of Lightroom. It takes time to learn, though. The same goes for darktable (and ART, another popular open source raw developer, originally based on RawTherapee).
Thank very much but i not understand about badpixels file in txt format…where is the badpixels file? I must create it? How add code lines for cordinates x and y of pixel?? It seems to me very hard task…Someone can give some light about this? Thanks
Simple method to remove hot pixels, go to the hot pixel/dead pixel filter and activate it. You have a threshold slider. Preprocessing - RawPedia
Use the bad pixel list to deal with permanent bad pixels Use RawTherapee to deal with laser damaged camera sensors – Kameratrollet
For long exposures, use a dark frame Dark-Frame - RawPedia
You can take hundreds of black frames at different exposure and ISO and put them in that folder.
Export files for further post processing Unclipped - RawPedia
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Thanks a lot but i think it’s a little annoying…for example if i upload a cr3 file in rawtherapee, then eliminate the hot pixels for clean image, next, when export cr3… I think its a little limited… because i can’t export the corrected image to DNG for example …only jpg or tiff…so if i export tiff and after i want reveal or edit photo to lightroom for example… This file have the same data raw like cr3 file for better edits…?? Or is like jpg??? Or yours edit and finish edit in rawtherapee? Thanks.
The TIFF is no longer a raw: it has been demosaiced, white balance has been applied etc. (Whether curves have been applied or not depends on your processing.)
Can Lr really not deal with hot pixels, so you need to use RT even though you want to edit in Lr?
Also, it may be worth to learn how to use RT (or the other open source raw developers) to fully develop the photo, instead of jumping between tools.
The hot pixel filter in LR is always turned on for raw files. It is missing a threshold slider. Because you cannot turn it off you have no idea what more it removes. When I tried to take pictures of Muon particles:
LR
darktable
Adobe DNG Converter strips the whole Makernote section for CR3 files when it exports to DNG files. Some parts of the Makernote section are still preserved when exporting from CR3 to TIFF in RawTherapee.
About your raw data question then. No, as already written, RawTherapee will demosaic the image. The good thing is that you with RawTherapee can change demosaicing method. For example AMaZE+VNG4. With LR I think you are still stuck with AHD.
When you speak about demosaic? What is the concept of demosaic? Its the process of reveal de raw file?.. So…i can’t use the hot pixel filter in jpg or tiff file right?.
Then… Tiff file don’t have all data for dynamic range for adjust exposure, recover shadows recover highlights, colors, contrast…etc??
When i export in RT IN JPG for example is better jpg8 bit? 12 bit? Tiff 32 bit?
About demosaicing, take a look at the video above. About shadows/highlights, export to 16/32 bit floating TIFF.
Ahhh okok thanks… it’s a little complex these things but thanks…
I have no issues to export a CR3 file in RawTherapee with clipped green highlights, with highlights reconstruction turned on, and then recover the whole sky in darktable.