1 October 1974 Image Coincidence Detection Using Optical Correlation Techniques
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Proceedings Volume 0045, Coherent Optics in Mapping; (1974) https://doi.org/10.1117/12.953967
Event: Coherent Optics in Modeling, 1974, Rochester, United States
Abstract
Data reduction from stereo-photography forms a powerful tool not only for measuring the size, shape and location of an object or a scene but also to ascertain other desired parameters such as surface areas, volumes, etc. from space coordinates. In a truly vertical overlapping pair of photographs the relief information pertaining to the object or the scene is stored in terms of differential x-parallax. The x-parallax difference is the principal cause of stereoperception and it is through the measurement of x-parallax dif-ference that terrain elevation measurements are made from a pair of aerial photographs using a stereoscopic instrument. All automated stereo-compilation instruments whether electronic or optical are based on the ability to match conjugate images and automatically measure the x-parallax difference. In the electronic correlation system this is achieved by correlating the electrical signals representing the image detail generated using a scanning process. In the optical systems a direct two-dimensional correlation is performed using the intensity or amplitude distribution of light representing the image detail.
© (1974) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
N. Balasubramanian, N. Balasubramanian, } "Image Coincidence Detection Using Optical Correlation Techniques", Proc. SPIE 0045, Coherent Optics in Mapping, (1 October 1974); doi: 10.1117/12.953967; https://doi.org/10.1117/12.953967
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