Spatial Filtering Using 3 X 3 Kernel Convolutions

J. T. Carlo; J. E. Hall

doi:10.1117/12.957276

20 August 1979 Spatial Filtering Using 3 X 3 Kernel Convolutions

J. T. Carlo, J. E. Hall

Proceedings Volume 0178, Smart Sensors; (1979) https://doi.org/10.1117/12.957276
Event: Technical Symposium East, 1979, Washington, D.C., United States

Abstract

The equivalence of 3 x 3 linear discrete convolution filtering to spatial frequency domain multiplication is reviewed in this paper. DPCM (Differential Pulse Code Modulation) is simply a low pass filter in the frequency domain. More complex 3 x 3 filters allow the choice of a band stop locus in the frequency domain in order to reduce unwanted spatial frequency components. This real time spatial filtering is readily implemented using a multitapped CCD delay line coefficients on-chip with a CCD imager.

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J. T. Carlo and J. E. Hall "Spatial Filtering Using 3 X 3 Kernel Convolutions", Proc. SPIE 0178, Smart Sensors, (20 August 1979); https://doi.org/10.1117/12.957276

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KEYWORDS

Convolution

Spatial frequencies

Linear filtering

Charge-coupled devices

Spatial filters

Imaging systems

Image filtering

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