Line scan camera image processing

Posted by vasco 12/25/2025

Line scan camera image processing(daniel.lawrence.lu)

69 points | 4 comments

gnabgib 12/26/2025|

Discussion (449 points, 4 months ago, 81 comments) https://news.ycombinator.com/item?id=44996938

dllu 12/30/2025|

Ah yeah, I recently changed the url scheme for my blog posts, from

    https://daniel.lawrence.lu/blog/y2025m09d21

    https://daniel.lawrence.lu/blog/2025-09-21-line-scan-camera-image-processing/

so maybe that's why OP didn't realize that it had already been posted recently. With the older scheme, not only is SEO bad, but it was really hard to remember which date corresponds to which blog post, and people can brute force search for my hidden (unpublished) blog posts easily.

shrx 12/29/2025|

Is the vertical banding due to the camera being unable to have a fixed exposure gain configured? Or just due to slight variances in the sampling times due to unstable oscillator frequency?

dllu 12/29/2025|

The gain is fixed. I think the column variation arises from unstable oscillator frequency and maybe some electrical bug/crosstalk between pixels. Not sure exactly.