Panasonic G9 High Resolution mode issue

[treben]

Hello, I was just wondering if anyone has experienced the issue shown in the image before. The image is a crop from the extreme far right edge of a high resolution stack I shot recently with my G9. I'm trying to figure out whats going on here and what I can do to fix it. It almost seems like a hot pixel pattern but it is repeated all the way down the side of the image. Of course I could just crop the far right off the image but I would like to fix it if possible. Perhaps the built in pixel refresh function? It only presents itself in the high res mode, and I don't see anything in my other photos. It does seem to be in all my high res shots. The settings I use for high res are: Size XL, raw+jpeg, 2 second delay, simul shot on.

 

[TomFid]

Hello, I was just wondering if anyone has experienced the issue shown in the image before. The image is a crop from the extreme far right edge of a high resolution stack I shot recently with my G9. I'm trying to figure out whats going on here and what I can do to fix it. It almost seems like a hot pixel pattern but it is repeated all the way down the side of the image. Of course I could just crop the far right off the image but I would like to fix it if possible. Perhaps the built in pixel refresh function? It only presents itself in the high res mode, and I don't see anything in my other photos. It does seem to be in all my high res shots. The settings I use for high res are: Size XL, raw+jpeg, 2 second delay, simul shot on.

Weird. Is this from the in-camera jpeg, or from the raw processed in some other software? In the latter case, I could imagine it's some sort of glitch in the software's handling of the hires raw. But that seems unlikely if Panasonic is doing the work.

 

[treben]

It's the raw file straight from the camera. I had checked it with a few raw developers and it was showing in all of them. However, I went and downloaded a few more programs to test and it's NOT showing in them. It's becoming a bit more clear... I suspect that the programs that show this behavior are all using libraw, so perhaps a bug there.

I've noticed other odd behavior that is related. The normal 20mp shot that gets recorded simultaneously with the hi-res shot has a strange green tint showing on the raw file, whereas another shot that was taken with the same camera settings but not using the hi-res feature is fine. Some kind of raw development issue or something in the metadata causing the software to act up?

 

[TomFid]

It's the raw file straight from the camera. I had checked it with a few raw developers and it was showing in all of them. However, I went and downloaded a few more programs to test and it's NOT showing in them. It's becoming a bit more clear... I suspect that the programs that show this behavior are all using libraw, so perhaps a bug there.

Makes sense. Presumably the edge rows/columns only have half the data from the shifts, and if the lib missed that fact it would lead to artifacts.

I've noticed other odd behavior that is related. The normal 20mp shot that gets recorded simultaneously with the hi-res shot has a strange green tint showing on the raw file, whereas another shot that was taken with the same camera settings but not using the hi-res feature is fine. Some kind of raw development issue or something in the metadata causing the software to act up?

My memory's a little fuzzy here, but I recall that the Oly hires raw files have the green levels at 2x the red and blue, perhaps because they're summing the measurements and there are twice as many green pixels. If the software is compensating for that in the hires file but not the lores portion, that would lead to weird tints (though I would have expected magenta rather than green).

 

[treben]

Just an update in case anyone has been following this...

I contacted libraw and they said that regarding the green tint issue, they don't see it. Upon checking programs that use libraw (fastrawviewer, windows photos with raw codec) they don't show the green tint for me either. Programs like On1 Photo Raw 2019 and 2020, darktable, raw therapee however do show the green tint. So it almost seems like this is an issue with the raw decoding that would need to be fixed in each program individually.

Libraw however confirmed the garbage on the right side of the hi-res shot and said it will be fixed by
"adjust the size of sensor technological area to be cropped out in future LibRaw update (coming soon)." The other programs mentioned also all showed the garbage on the right side of the hi-res shot, and will probably need a fix as well if they don't use libraw.

 

[Keit ll]

I don't whether this the case here but some RAW developers read a slightly larger area of the sensor than some others & this extra area may show up with artefacts,. What is the file size indicated? Is it 5184 x 3888 in mft mode

 

[Iliah Borg]

Programs like On1 Photo Raw 2019 and 2020, darktable, raw therapee however do show the green tint. So it almost seems like this is an issue with the raw decoding that would need to be fixed in each program individually.

More like an issue with raw conversion and raw processing, not decoding.

Current versions of RawTherapee and DarkTable don't use LibRaw code.

Libraw however confirmed the garbage on the right side of the hi-res shot and said it will be fixed by
"adjust the size of sensor technological area to be cropped out in future LibRaw update (coming soon)." The other programs mentioned also all showed the garbage on the right side of the hi-res shot, and will probably need a fix as well if they don't use libraw.

Thank you for e-mailing us with this issue.

Size of the buffer (technological) area can be changed with a firmware upgrade, or for any other reason. It (and other things, too) can be changed between the camera batches.

LibRaw can be used in many ways, one of which is as a sort of documentation.

We always welcome bug reports, and try to fix them asap.

 

[treben]

I don't whether this the case here but some RAW developers read a slightly larger area of the sensor than some others & this extra area may show up with artefacts,. What is the file size indicated? Is it 5184 x 3888 in mft mode

The file that shows the artifacts on the right side is only the hi-res raw file. It's dimensions are 10404 x 7794, although in On1 photo raw it shows as 5184x3888 erroneously.

In raw therapee it shows as 10396x7786 and also shows the green tint, but no artifacts on the right side likely because it is trimmed.

In darktable it's shown as 10480x7794, has a green tint and shows more artifacts then any other program (there's a wider bar of garbage all the way down the right) likely because it isn't trimmed at all.

In fastrawviewer (libraw based I believe) it's shown as 10392x7786 and shows no green tint or artifacts. Interestingly, the regular 20mp raw files are shown as being 5196x3896, slightly larger.

Thank you for e-mailing us with this issue.

Size of the buffer (technological) area can be changed with a firmware upgrade, or for any other reason. It (and other things, too) can be changed between the camera batches.

LibRaw can be used in many ways, one of which is as a sort of documentation.

We always welcome bug reports, and try to fix them asap.

Ah, I see. Thank you for the information.

 

[aikiboy]

Probably a silly question, but if you crop it does the artifact still appear?

Jonathan

 

[Iliah Borg]

Probably a silly question, but if you crop it does the artifact still appear?

Jonathan

No, it doesn't. But we need to crop it correctly in LibRaw in the first place. Possibly the files we used to establish the crop came from some early production batch / pre-production firmware. Equally possible that we overlooked something.

 

[chrisfigs]

I came across your post because I am having an issue with High Resolution Mode on the Panasonic S5. I was shooting a scene at dusk and exposed for the moon so that the foreground and the uppermost part of the sky were black or close to it. I used high resolution mode because I wanted the highest color accuracy and it also tends to render any noise so fine that it only adds to the image instead of being distracting. Anyway, when I got home and opened the images, I noticed a number of red, green, and blue spots in the dark areas.

I immediately thought this could be because of some hot/dead pixels on the sensor, but I shot a black frame and none show up at normal resolution.

I don't know what is going on and I am wondering if it is related to your issue.

 

[Adrian Harris]

I came across your post because I am having an issue with High Resolution Mode on the Panasonic S5. I was shooting a scene at dusk and exposed for the moon so that the foreground and the uppermost part of the sky were black or close to it. I used high resolution mode because I wanted the highest color accuracy and it also tends to render any noise so fine that it only adds to the image instead of being distracting. Anyway, when I got home and opened the images, I noticed a number of red, green, and blue spots in the dark areas.

I immediately thought this could be because of some hot/dead pixels on the sensor, but I shot a black frame and none show up at normal resolution.

I don't know what is going on and I am wondering if it is related to your issue.

A few thoughts:

Coloured pixels always seem to appear on long shutter night shots. Try the hot/dead pixel refresh, in settings. It may help.

If doing lots of longer exposures sensor heats and more spots appear.

Don't leave camera switched on between shots (it'll help sensor cool).

Some raw conversion software identifies and removes hot pixels automatically without us knowing it. Possibly it can't do that with a composited hi-res shot?

 

[kalisti]

I came across your post because I am having an issue with High Resolution Mode on the Panasonic S5. I was shooting a scene at dusk and exposed for the moon so that the foreground and the uppermost part of the sky were black or close to it. I used high resolution mode because I wanted the highest color accuracy and it also tends to render any noise so fine that it only adds to the image instead of being distracting. Anyway, when I got home and opened the images, I noticed a number of red, green, and blue spots in the dark areas.

I immediately thought this could be because of some hot/dead pixels on the sensor, but I shot a black frame and none show up at normal resolution.

I don't know what is going on and I am wondering if it is related to your issue.

you may have more luck asking on the L-mount forum, start a thread there you should get some replies

https://www.dpreview.com/forums/1071

 

[chrisfigs]

Great suggestions Adrian! Thanks for your insight into this.