PPT Slide

Single Camera Calibration

Stanford University School of Engineering

Department of Mechanical Engineering

XX February 2000

Real world problem: Water adds another factor

h

CCD

Image plane

Index of refraction for water = 1.33

Index of refraction for air = 1.00

water

air

glass

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• Show focal distance problem with optics
• Ray Tracing technique has been derived but for specific lens system (Li et al, 1997) (Univ. of Calgary)
• One approach is to do a math model for each underwater camera and then calibrate. Or come up with a general model that a calibration fits with a reasonable error.
  • present current state of calibration at MBARI and future development