Correction of artifacts in correlated double-sampled CCD video resulting from insufficient bandwidth

Robert H. Philbrick

doi:10.1117/12.805609

4 February 2009 Correction of artifacts in correlated double-sampled CCD video resulting from insufficient bandwidth

Robert H. Philbrick

Proceedings Volume 7244, Real-Time Image and Video Processing 2009; 72440M (2009) https://doi.org/10.1117/12.805609
Event: IS&T/SPIE Electronic Imaging, 2009, San Jose, California, United States

Abstract

Correlated Doubling Sampling (CDS) is a popular technique for extracting pixel signal data from raw CCD detector output waveforms. However some common electronic design approaches to implementing CDS can produce undesired artifacts in digitized pixel signal data if the bandwidth of the CCD waveform entering the CDS circuit is too low, which could be the result of an intentional design implementation approach or the result of a failure in one or more electronic components. An example of an undesirable artifact is an overshoot (undershoot) pixel response when transitioning from a black-to-light (light-to-black) image scene in the serial read out direction. In this paper an analytical model is developed that accurately describes the temporal behavior of the CDS circuit under all CCD video bandwidth conditions. This model is then used to create a signal processing kernel that effectively removes all undesired artifacts associated with the operation of CDS electronics with CCD waveforms exhibiting low bandwidth response. This correction approach is demonstrated on digitized data from a CCD-based instrument with known bandwidth issues and exhibiting undershoot/overshoot artifacts and the results show that the undesirable artifacts can be completely removed.

Citation Download Citation

Robert H. Philbrick "Correction of artifacts in correlated double-sampled CCD video resulting from insufficient bandwidth", Proc. SPIE 7244, Real-Time Image and Video Processing 2009, 72440M (4 February 2009); https://doi.org/10.1117/12.805609

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