Finding the resolution of the camera for image processing

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Emmanuel 2014-6-19

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评论： Image Analyst 2014-6-23

Hey all! I calibrated my camera and using RGB colored markers I detected the triangle formed by these three colored markers and measured their distances. The error between real-time distance and that obtained by the camera was around less than or equal to 4mm For a resolution of 800x480. But I need 0.1mm. How do I do that? I can resolution, but how can I know that this resolution can give me a 0.1mm accuracy?

Thank you all.

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Image Analyst 2014-6-19

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What is your field of view in mm? Divide that by 800 and tell me the size of one pixel on the scene.

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Emmanuel 2014-6-23

its 12cm x 8 cm.

Image Analyst 2014-6-23

So your resolution is 120 mm / 800 pixels = 0.15 mm per pixel. You do not have the resolution needed to resolve two objects 0.1 mm apart. You'd need a camera with higher resolution, unless you want to do some very complicated super-resolution things.

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