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| 07:00 | Bertl | morning se6astian!
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| 07:42 | se6astian | good morning!
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| 08:57 | Bertl | off to bed now ... have a good one everyone!
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| 15:08 | Bertl | morning folks!
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| 15:09 | alexML | hi Bertl
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| 15:09 | alexML | may I ask you what's the current LVDS clock value?
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| 15:11 | Bertl | currently we have 250MHz and 280MHz in use
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| 15:13 | alexML | do you remember the value used in these samples? http://files.apertus.org/AXIOM-Beta/snapshots/colorcharts/
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| 15:13 | Bertl | most likely 250MHz
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| 15:14 | alexML | why I ask: I'm trying to decode the temperature sensor, and they say at 300 MHz, offset at 0 degrees C is 825, and it's proportional to CLK_IN (which I guess it's LVDS clock)
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| 15:15 | alexML | with 280 MHz, the offset would be 687
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| 15:15 | alexML | but... reg[127] is 635, so I get -18 degrees C :P
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| 15:15 | alexML | the camera wasn't in a freezer, I guess
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| 15:15 | Bertl | unlikely :)
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| 15:16 | Bertl | as far as I understood the datasheet, the offset varies greatly with the sensor
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| 15:17 | Bertl | and that also matches our experience with different sensors, so to make sense of that value, you have to do a calibration
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| 15:27 | alexML | btw, do you save the lvds clock anywhere in the metadata?
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| 15:29 | Bertl | nope, it is not directly available to userspace yet
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| 15:31 | alexML | okay, then I'll assume it's 250 in raw2dng when interpreting the metadata, for now
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| 15:42 | alexML | would be nice to have it in metadata though, if it's changed often
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| 15:43 | alexML | (a quick and dirty way that won't change the file format would be to put it instead of reg[0], which is unused anyway)
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| 15:47 | Bertl | it can only change when the FPGA firmware changes (for now) so the firmware identifier, which is available in userspace, could identify it
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| 15:47 | Bertl | we can add that to the raw dump (with an option)
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| 16:42 | irieger | alexML: is the fixed pattern noise correction currently in misc-tools your current state?
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| 16:43 | irieger | I want to read through the code the next days so I'd like to know if it is the right code I read ;-)
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| 16:43 | irieger | my correction currently seems to not work out well
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| 16:44 | alexML | yes, it is (--fixpn option)
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| 16:45 | alexML | you may also want to try RawTherapee's version (it's faster)
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| 16:46 | alexML | in RT, it's in the Preprocessing tab, under Demosaic (Line Filter)
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| 16:47 | alexML | my fix is basically a strong denoise, then I decompose the noise into constant row (or column) offsets + residuals, then apply just the offsets
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| 16:48 | alexML | however, I smell that pattern noise intensity increases in bright areas (this is not yet handled in my algoroithm)
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| 17:02 | irieger | Ok. I currently have more row noise in the dark parts. But maybe I just had the idea where it may come from. Have to check on the data
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| 17:05 | alexML | do you have application note AN01 v6? there they describe quite a few things to try
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| 18:12 | alexML | my first attempt at linearizing the sensor response: https://dl.dropboxusercontent.com/u/4124919/bleeding-edge/apertus/linearized/colorchecker_gainx2_15ms_01.dng
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| 18:15 | alexML | (you can do white balance on the gray patches, with results a little more consistent than before)
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| 18:15 | alexML | (also, the shadows look a bit less crushed)
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| 18:16 | alexML | (original sample is http://files.apertus.org/AXIOM-Beta/snapshots/colorcharts/ColorcheckerPassport/colorchecker_gainx2_15ms_01.raw12 )
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| 18:49 | Bertl | off for now ... bbl
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