measure height of object in millimeter

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Walaa
Walaa 2022-12-3
评论： Walaa 2022-12-3
If I have these details (FOV, distance between the object and the lens, object height in pixels), is it possible to measure the object's height in millimetres, provided that I am unable to measure the physical height of the object?

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Image Analyst
Image Analyst 2022-12-3
Yes. If you know the FOV (field of view) in mm then you can. Of course you know the size of your image. So the spatial calibration vertically = (FOV in mm) / (num rows in image array)
mmPerPixel = size(imageArray, 1) / FOVinMm
So now, for any arbitrary object height in pixels in your image, it's real world height in mm is
heightInMm = heightInPixels * mmPerPixel

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