"Bright" or "Discolored" images in timelapse.

[TbilisiAstro]

Hello, I was told by Eric to start a discussion here regarding some "bright" images and a few "discolored" images making it into the final timelapse video. I'm wondering if there is some settings I need to adjust to keep the images from getting in. Any help is greatly appreciated. I've included the .jpeg images of the problem photos as well as the following photos in the sequence. I have also included screenshots to provide wider context to what surrounds the problem photos. Hopefully these will help!

Thanks again!
JB

[EricClaeys]

JB, thanks for posting. I am Eric. I also get occasional purple images and I have seen other people with ZWO cameras get them.
Please do the following:

sudo systemctl stop allsky 
sudo truncate -s 0 /var/log/allsky.log 
# Change Debug Level in the WebUI to 3.
# Press the "Save changes" button

When you see a purple image, post the image name and attach /var/log/allsky.log. I will then know where to look in the log file.

Ditto for a bright image.

[TbilisiAstro]

Ok, I will get those changes implemented and report back. Thank you Eric

JB

[aaronwmorris]

I have seen the same behavior on at least one camera on indi-allsky. Specifically, it was an ASI224MC.

I suspect the issue was caused by the camera reading the image sensor with the wrong offset, which means the debayer algorithm renders incorrect colors. It seemed to happen at random and affected very few frames.

[craigim]

I see this behavior with my RPi HQ camera.

[EricClaeys]

@craigim,
Please do the following:

sudo systemctl stop allsky 
sudo truncate -s 0 /var/log/allsky.log 
# Change Debug Level in the WebUI to 3.
# Press the "Save changes" button

When you see a purple image, post the image name and attach /var/log/allsky.log. I will then know where to look in the log file.

I want to make sure Allsky isn't doing something to cause the purple.

[chvvkumar]

@EricClaeys I just saw this discussion a few days ago and was able to get the logs and images as you mentioned above. I am also seeing this random switch between reddish and bluish tint in images, regardless of whether AWB is enabled or not with my HQ camera.

Images from one night:
https://drive.google.com/drive/folders/1iX4Q3WU4tyfL9GxHs_0PHQj_BKGfkJZ7?usp=sharing

allsky.log
allsky.log.1.log

[EricClaeys]

Please add to the Issue on the raspi-cam GitHubpage. Several other people are having the same problem.
Thanks.

[chvvkumar]

Thank you, I added this information to that issue

raspberrypi/rpicam-apps#715 (comment)