Showing papers on "Digital image correlation published in 1975"
TL;DR: Initial experimental results demonstrating the operation of this real-time two-dimensional hybrid processor in phased array radar data processing, synthetic aperture image correlation, and text correlation are included.
Abstract: A real-time two-dimensional hybrid processor consisting of a coherent optical system, an optical/digital interface, and a PDP-11/15 control minicomputer is described. The input electrical-to-optical transducer is an electron-beam addressed potassium dideuterium phosphate (KD 2 PO 4 ) light valve. The requirements and hardware for the output optical-to-digital interface, which is constructed from modular computer building blocks, are presented. Initial experimental results demonstrating the operation of this hybrid processor in phased array radar data processing, synthetic aperture image correlation, and text correlation are included. The applications chosen emphasize the role of the interface in the analysis of data from an optical processor and possible extensions to the digital feedback control of an optical processor.
17 citations
01 Mar 1975
TL;DR: This study leads naturally to the question of how much information about an image can be stored in the phase of the Fourier transform of the image.
Abstract: The availability and use of phase-only optical processing materials has stimulated the study of phase-only holography and spatial filtering. (Refs. 1,2,3) This study leads naturally to the question of how much information about an image can be stored in the phase of the Fourier transform of the image. The kinoform is an optical de-vice that uses only the phase of the Fourier transform in image reconstruction; any information contained in the magnitude of the Fourier transform is lost, and this contributes to image degradation.
2 citations