Isi Deconvolut Ional Technique Used In Restorat Ion Of Image Pixel Interference

Satoru C. Tanaka; Masoud Fattahi

doi:10.1117/12.976253

23 March 1986 Isi Deconvolut Ional Technique Used In Restorat Ion Of Image Pixel Interference

Satoru C. Tanaka, Masoud Fattahi

Proceedings Volume 0698, Real-Time Signal Processing IX; (1986) https://doi.org/10.1117/12.976253
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

Abstract

In a simple imaging device, the swn-pling speeds are usually limited- by the adjacent pixel interference (API). The correction for this distortion can be treated similarly to those techniques developed in the field of communication because signals in both fields are shaped and distorted by their respective transfer functions, i.e., a serial stream of past data points are convolved together. In the field of communication intersymbol interference (ISI) has been under extensive study in the past decade and, as a consequence, simple techniques to separate these convolved data points have been developed. In contrast, because image processing was concerned with two dimensional optical signal distortions, the image world has corrected the neighboring pixel interference through sophisticated methods, i.e., complicated computer algorithms and sophisticated circuits. However, when limited frequency response in the signal processing circuit causes neighboring pixels to convolve together, they can be deconvolved with an inexpensive and simple transversal filter network with speed in excess of 5mhz pixel rate. Furthermore, this filtering technique can enhance the signal to noise ratio for a given system by bandwidth enhancement of a low-noise low-frequency amplifier. This paper briefly explains the phenomenon of the (ISI) and technique used for its correction, then demonstrates that an analogous API exists in the world of image processing and that same correction technique can be used.

Citation Download Citation

Satoru C. Tanaka and Masoud Fattahi "Isi Deconvolut Ional Technique Used In Restorat Ion Of Image Pixel Interference", Proc. SPIE 0698, Real-Time Signal Processing IX, (23 March 1986); https://doi.org/10.1117/12.976253

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