![]() Inexpensive single lens systems distort image at its periphery.Image may be obtained by digitizing card § A/D converter samples NTSC signal Monitor Camera NTSC signal Digitizing displa圜CD/CMOS.Camera pixels are not necessarily square.Robot, hand-eye coordination Image plane Evaluation of position of a square for 2 focal lengths (red and blue projection geometry)We see a square ofknown size.Good calibration is important when we need to § Reconstruct a world model: Virtual L.A.It is typically not at (width/2, height/2) of image § Focal length § Different scaling factors for row pixels and column pixels § Skew factor § Lens distortion (pin-cushion effect). ![]() Primarily, finding the quantities internal to the camera that affect the imaging process § Position of image center in the image.
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