网络摄像头传感器尺寸

Question

Using the calibration methods (Matlab or OpenCV), one can find the focal length of a webcam. I am wondering if there is anyway to measure the sensor size of a webcam as well?

Thanks

Answer 1

it is pixel size * resolution

resolution is nothing but image width * height in pixels

in general pixel size is written at the specs of the camera; if you dont know, then pinhole camera model

f / (distance to object in mm) = (object length in pixels) * (pixel size in mm) / (object length in mm)

may help you calculate that. you should use an object with known size and at a precise distance to use the formula.