Limitations Of Subtraction Techniques Applied To Incoherent Optical Image Restoration

P. Chavel

doi:10.1117/12.958518

25 April 1980 Limitations Of Subtraction Techniques Applied To Incoherent Optical Image Restoration

P. Chavel

Proceedings Volume 0218, Devices and Systems for Optical Signal Processing; (1980) https://doi.org/10.1117/12.958518
Event: 1980 Los Angeles Technical Symposium, 1980, Los Angeles, United States

Abstract

Incoherent optical information processing is known to be far less sensitive to noise than coherent processing. However, if positive and negative quantities have to be implemented, as is normally the case in image restoration, incoherent convolution can be used only in a three-step process involving two convolutions and one subtraction. This communication describes the difficulties which appear in that case and which in part offset the noise advantage of incoherent illumination; alignment and normalization of the two images to be subtracted are critical issues. If the subtraction is performed optically, the dynamic range of this operation is an additional problem which is discussed here on a specific example.

Citation Download Citation

P. Chavel "Limitations Of Subtraction Techniques Applied To Incoherent Optical Image Restoration", Proc. SPIE 0218, Devices and Systems for Optical Signal Processing, (25 April 1980); https://doi.org/10.1117/12.958518

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