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Author Topic: Imgs taken by auto focus, calibration tool only estimate one focus  (Read 5193 times)

JimXu

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Hi,
I use auto focus mode to capture an object in difference distance, the calibration tool only estimated one camera focus, is that the mean focus?
When I use my phone camera in manual focus mode, the estiamted focus are more than one.

tazzo

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Re: Imgs taken by auto focus, calibration tool only estimate one focus
« Reply #1 on: March 31, 2023, 01:21:47 PM »
Hello Jim,

Focus is always a single plane because the sensor is planar.

Would be better if you shoot in manual focus at different distances and you create a camera group for each distance. Keep in mind that to estimate the camera parameters you need many photo at each distance.

The best scenario I guess is to use fixed focal / fixed focus in a spherical way around the object to always have the same distance.