Author Topic: Chronos V0.6.0 Full Release  (Read 1716 times)

Nikon1

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Re: Chronos V0.6.0 Full Release
« Reply #15 on: February 20, 2021, 04:53:54 AM »
I also noticed some Horizontal "Banding" (or whatever one would call that?) when Overexposed Areas are In Frame right next to dark areas. Dont remember them to be this visible in the Last Version, but will double Check, if i find time for that. I also dont really know, if this is just a Flaw of the Sensor itself, or if this is a software thing. Still way more organic looking than the Vertical Lines from the Last version, but if this could be improoved would sure be neat. Here is two DNGs in a .Zip, from me trying to reproduce this Banding.
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 #EDIT#: Forgot to put the Settings that this was shot at here: 35mm 2.8 Russian Lens, 12dB gain, 359° 1kfps

 So i tried to reproduce the Banding in the 0.5.037 Unstable Build, and i CAN still see it there in some Extreme Lighting Situations, but it is WAY less obvious to even Barely noticeable depending on what else is in frame. In fact, i didnt even really notice it was there bevore this new 0.6.0 Software really. In the New software however, most extreme i seen was about 1/3 of the Whole Area of Frame Blacking out (Areas Horizontally next to Large Overexposed Area in an overally pretty dark overall frame) Completely. On the Older Software it at worst just affects Brightness Value of the Whole Horizontal Area next to Over Exposed areas a tiny bit, which is mostly hard to notice, unless you are Specifically looking for it; Most visible on the Older Versions are the "Edges" of Square Overexposed Areas/ the Horizontal Lines that Produces at the Edges (those are still very faint tho). Will Upload some Kind of Comparison, if i manage to get a good recording of that.
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 The whole thing reminds me a lot of the Vertical Smear Phenomenon of old CCD-Sensor Cameras somehow. There Was Some really good full Article about it, what is going on and why, sometime ago; but i cant find it, best thing i found about it rn is this Publication on Page 4, where they talk about it a little bit:
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 https://www.researchgate.net/publication/315944464_Stroboscope_Based_Synchronization_of_Full_Frame_CCD_Sensors

Bian

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Re: Chronos V0.6.0 Full Release
« Reply #16 on: February 20, 2021, 05:30:16 AM »
I also noticed some Horizontal "Banding" (or whatever one would call that?) when Overexposed Areas are In Frame right next to dark areas. Dont remember them to be this visible in the Last Version, but will double Check, if i find time for that. I also dont really know, if this is just a Flaw of the Sensor itself, or if this is a software thing. Still way more organic looking than the Vertical Lines from the Last version, but if this could be improoved would sure be neat. Here is two DNGs in a .Zip, from me trying to reproduce this Banding.
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 #EDIT#: Forgot to put the Settings that this was shot at here: 35mm 2.8 Russian Lens, 12dB gain, 359° 1kfps

 
I can confirm this. In addition, i made another observation - if the white areas decline at 50 IRE it looks like they get pink....

Nikon1

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Re: Chronos V0.6.0 Full Release
« Reply #17 on: February 20, 2021, 05:12:18 PM »
Managed to finally set up three MicroSD´s to test all the Versions. Here is a Test for banding at 250fps, 360°, 0+0 dB Gain; 15mm @ f/0,9 with the Camera well warmed up.
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 Software Version 0.5.1 (This file was Run through AE CS6 to compress it from 108MB down to now just 46MB, apart from the Bitrate untouched Footage):

Nikon1

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Re: Chronos V0.6.0 Full Release
« Reply #18 on: February 20, 2021, 05:16:04 PM »
And here another one from the New 0.6.0 (also untouched, straight from the Camera):
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 all Three where shot at exactly the same settings with Whitebalance set to the 4600K Preset (Lamp beeing 4000K Color). I did pan not quite at the same Speed every time, so they show different amounts of Motion blur and Ghosting (yes, Ghosting is visible on all Three Software Versions, seems about unchanged across them, might could cause problems for More Technical / Research kind of applications i assume), but should give a pretty good idea of how visible the Banding can be. Didnt quite manage to record some of the more Extreme Light setting with this yet, but it clearly shows here. As Light and Camera/ Lens Settings are unchanged, this test also confirmes, that there is indeed quite a noticeable difference in Light Sensitivity with the New Software compared to recent versions. the Unstable Build is ever so slightly more sensitive than the Stable 0.5.1 Build from what i can tell, and the 0.6.0 Version is quite a bit darker, like half a Stop of Light or so, or even more. Also Highlights tend to be more Pink when Overexposed, as Bian allready said.
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 #EDIT#: Did also shoot the Same thing with the 0.5.037 Unstable Version, but couldnt upload all Three, because Space on the Server was full or something, got an Error Message when trying to upload. So i just uploaded the old and the New Version, as the Unstable and Stable 0.5.xxx Versions looked about the same.
« Last Edit: February 20, 2021, 05:32:22 PM by Nikon1 »

JamesB

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Re: Chronos V0.6.0 Full Release
« Reply #19 on: February 24, 2021, 04:11:47 AM »
After my limited testing, it is clear the banding has been reduced a whole lot. It will still show up in the shadows and under exposed areas severely (Shows up as red and cyan vertical bands in shadows mostly).  However, given enough light and taking care to overexpose a bit it is fairly well reduced.   I was able to get Topaz Video Enhance AI to almost completely eliminate the shadow vertical banding after processing which really saved the day. 

I can't attest to the DR loss since I went straight to v6 for my testing but it will be good to try to preserve more of it.   All in all very stable release, no issues with saving multiple clips for about 4hrs.  I was also pleasantly surprised by the good quality h.264 output with lots of detail from the 2.1 camera which is in my view an order of magnitude better than what the 1.4 was able to achieve.  Of course, shooting DNG RAW remains unmatched.   ;D

Bian

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Re: Chronos V0.6.0 Full Release
« Reply #20 on: Today at 01:52:08 AM »
A little comparison between 1.4 and 2.1 - both with V0.6.0
Outdoors, no clouds.
Framerates: 17391 (1.4) and 16191 (2.1) recorded as TIFF



In my opinion the 1.4 picture looks well - the 2.1 picture is very flat....


BeSch

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Re: Chronos V0.6.0 Full Release
« Reply #21 on: Today at 11:20:17 AM »
I have a 2.1 but update doesn´t work here.  Using balenaEtcher, W10, W7, MacPro and different SDs. After balena is finished I have only a e:/boot 35 MB partition (!) and nothing else. WINrar doesn´t work either. Do I probably need a  NEW completely unformated card to proceed?

Nikon1

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Re: Chronos V0.6.0 Full Release
« Reply #22 on: Today at 11:22:36 AM »
did you unpack the File First? i used 7Zip, if you just put the File as is from the Downloader into the Etcher, it wont work.

BeSch

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Re: Chronos V0.6.0 Full Release
« Reply #23 on: Today at 01:14:59 PM »
Yes, I did.

Chronos-20210205_manualBuild.img  >>>>>> Etcher ... and here is what I got:

Boot E:/  35MB - and nothing else, although another windows says "Flash complete"!

Allright....

But when I inserted the card into the cam and started it nothing happens, no ´column gain calibration sign,´ no update

Nikon1

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Re: Chronos V0.6.0 Full Release
« Reply #24 on: Today at 01:23:16 PM »
Thats normal so far, you cant easily see the other Partition on Windows. Only the Small Boot one will show up, but there is an invisible other one too. Does the Camera start up with that card however, meaning, you see an Krontech Logo/ Animataion after a bit and later a User interface you can interact with, or is something along the Boot-Process broken?

BeSch

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Re: Chronos V0.6.0 Full Release
« Reply #25 on: Today at 01:40:20 PM »
Everything is clear now  The microSD card on the bottom, NOT the SD card on the top! 

Thanks to Mostafa Azarbar (opening my eyes).

Read quick, be blind ;)
« Last Edit: Today at 01:45:54 PM by BeSch »