Simplified Method for Radiometric Calibration of an Array Camera

Radiometric calibration of a CCD camera is a first step when quantitative measurements for pixels values will be performed in order to extract scene characteristics. Usually, the radiometric behaviour of the camera can be modelled with a polynomial function obtained from a multi- image calibration m...

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Bibliographic Details
Main Authors: Cano-Garcia, A., Lazaro, J.L., Fernandez, P.R.
Format: Conference Proceeding
Language:English
Subjects:
Calibration
Cameras
CCD Camera
Charge coupled devices
Charge-coupled image sensors
distance measurement
Image analysis
infrared
Layout
Performance evaluation
Polynomials
Radiometric Response
Radiometry
Testing
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Description
Summary:Radiometric calibration of a CCD camera is a first step when quantitative measurements for pixels values will be performed in order to extract scene characteristics. Usually, the radiometric behaviour of the camera can be modelled with a polynomial function obtained from a multi- image calibration method, which analyses several pictures taken with different exposition times. In this work, a simplification of a multi-images calibration method is proposed. The method is based on the comparison of grey values of two images only, showing that obtained results are comparables to the polynomic multi-image method. The proposed method was tested with the same images used for multi-image calibration method. Exposition times were estimated without an iterative scheme. Also a method and results for distance estimation, using inverse radiometric response function, are showed in this paper.
DOI:10.1109/WISP.2007.4447619