Post AxQBdG67AipJNo27MW by pavel@social.kernel.org
(DIR) More posts by pavel@social.kernel.org
(DIR) Post #AxQBdG67AipJNo27MW by pavel@social.kernel.org
2025-08-22T06:27:10.086545Z
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@linmob @martijnbraam Yep, sensor calibration can be a lot of fun, too. There's enough work to be done all over the place. (And first step -- linearize data from sensor -- is something I'll need to investigate for Clicks Machine).
(DIR) Post #AxQBdHWNsXQxnZKbwm by dos@social.librem.one
2025-08-22T06:43:57Z
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@pavel @martijnbraam @linmob What you get from the sensor is already linear.
(DIR) Post #AxQBdIpZ0iMzrLJRTs by pavel@social.kernel.org
2025-08-22T07:04:24.166269Z
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@dos @martijnbraam @linmob Apparently no: https://blog.brixit.nl/fixing-the-megapixels-sensor-linearization/ .
(DIR) Post #AxQBdJyojnMlQKeLXk by dos@social.librem.one
2025-08-22T07:14:08Z
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@pavel @martijnbraam @linmob I was looking at these results some time ago and they turned out to be nothing but clipped data and lack of data pedestal handling.
(DIR) Post #AxQBdKubGxaSJXgUbo by pavel@social.kernel.org
2025-08-22T07:24:18.580524Z
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@dos @martijnbraam @linmob Do you have some data to back up that linearity claim? I believe there's consensus that it will not be linear near saturation. OTOH I don't believe there's consensus of how important that effect is :-(. https://www.mdpi.com/1424-8220/24/6/1841
(DIR) Post #AxQBdLuzWzUhR2sJrE by dos@social.librem.one
2025-08-22T07:43:33Z
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@pavel @martijnbraam @linmob After fixing Megapixels' tool, the result is linear up until the image starts clipping (at around 0.6 in this case). Since that tool averages the values across the whole frame, what you're seeing above that is lens shading.