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Author: David Casasent
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
Research on optical pattern recognition (OPR) for missile guidance has addressed three general areas: new OPR techniques, OPR experiments on specific missile guidance problems and scenarios, and component evaluation and testing. In the area of component evaluation and testing, research has been concentrated on 2-D spatial light modulators (SLM) with specific attention to the photo-DKDP, prom, and the liquid crystal light valve and to a general test and evaluation procedure for these devices. A general SLM test and evaluation procedure has been developed. In the area of new OPR techniques, a coherence measure correlator, an equalization correlator, moment invariant hybrid correlator and an averaged filter correlator have been developed. Specific missile guidance scenarios persued were OPR of multi-sensor and infrared imagery. The former has laid initial ground work for a future program in optical statistical and deterministic pattern recognition. The latter has initiated a generalized approach to OPR using hyperspace formulations and linear combinations of orthonormal basis functions.
Author: David Casasent
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
Research on optical pattern recognition (OPR) for missile guidance has addressed three general areas: new OPR techniques, OPR experiments on specific missile guidance problems and scenarios, and component evaluation and testing. In the area of component evaluation and testing, research has been concentrated on 2-D spatial light modulators (SLM) with specific attention to the photo-DKDP, prom, and the liquid crystal light valve and to a general test and evaluation procedure for these devices. A general SLM test and evaluation procedure has been developed. In the area of new OPR techniques, a coherence measure correlator, an equalization correlator, moment invariant hybrid correlator and an averaged filter correlator have been developed. Specific missile guidance scenarios persued were OPR of multi-sensor and infrared imagery. The former has laid initial ground work for a future program in optical statistical and deterministic pattern recognition. The latter has initiated a generalized approach to OPR using hyperspace formulations and linear combinations of orthonormal basis functions.
Author: David Casasent
Publisher:
ISBN:
Category :
Languages : en
Pages : 70
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Book Description
The initial phase of our synthetic discriminant function optical pattern recognition research has been completed. This hyperspace description allows the use of off-line synthesis of a filter function that provides both intra-class recognition (of a key object independent of geometrical distortions) and inter-class discrimination (of a key object from candidate false targets). A new theoretical model for multi-sensor data, a description of a general multi-sensor processor and a statistical analysis of both have also been completed. Initial experimental correlations were obtained and found to be in agreement with our model and theoretical analysis. A new parameter, the correlation measure, was found to be of use in determining the multi-sensor nature of input imagery and a (GRAD) digital preprocessing operator was found to be quite adequate for the cases considered. Our initial optical correlations on the autonomous terminal homing data base were also completed. In this research, aperture correlation effects were overcome by a new technique, optical and digital correlations on the same data base were obtained and compared (with a high pass filter model for the optical matched filter found to be adequate and appropriate for many applications), and sensed/synthetic optical image correlations were obtained (with the help of photoreduced imagery and advanced preprocessing operations). (Author).
Author: David Casasent
Publisher:
ISBN:
Category :
Languages : en
Pages : 136
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Book Description
This research concerns optical data processing for missile guidance and target recognition. It uses pattern recognition techniques with an increased use of knowledge base, inference machine and associative processor techniques. This work concerns new algorithms, real time and practical realizations of such systems, and new initial work on associative processors, symbolic rule-based processors and directed graph processors (with new attention to unique optical realizations of such systems). Keywords: Optical data processing; Pattern recognition; Feature extraction; Associative processors; Symbolic processors; Rule based processors.
Author: John R. Shewell
Publisher:
ISBN:
Category :
Languages : en
Pages : 78
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Book Description
This report covers the results of an advisory contract with directions to assist the Laser Measurement Technology Group of the US Army Missile Command Redstone Arsenal, Alabama in an initial evaluation of the potential applicability of optical pattern recognition to target identification and terminal homing systems. The initial part of the report is a tutorial survey of optical pattern recognition which includes a selected bibliography that reflects the present state of the art. Sections 1 and 2 discuss two potential applications. Preliminary calculations indicate that it is energetically practical to use optical pattern recognition techniques for target recognition over a range of five kilometers. Less detailed calculations on another possible applications indicate that detection of either intensity distributions or intensity gradients can be used for target recognition; however, electronic techniques are probably preferable to optical processing techniques. (Author).
Author: David Paul Casasent
Publisher:
ISBN:
Category :
Languages : en
Pages : 286
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Book Description
Our research concerns optical data processing for missile guidance and target recognition. It uses pattern recognition techniques with an increasing use of knowledge base, inference machine and associative processor techniques. Our Year 2 work addresses devices (the liquid crystal television), Kalman filters, intrinsic features, iconic filters, and symbolic processors. These all represent quite novel optical processing concepts. Our work also concerns new architectures and concepts such as: relational graph processors, optical linear discriminant processors, model-based optical processors, hierarchical symbolic optical correlators, and optical associative processors.
Author: Thomas F. Wiener
Publisher:
ISBN:
Category : Guided missiles
Languages : en
Pages : 510
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Book Description
Author: Geoffery C. Knight
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 140
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 324
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Book Description
Author: Francis T. S. Yu
Publisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Computers
Languages : en
Pages : 668
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Book Description
SPIE Milestones are collections of seminal papers from the world literature covering important discoveries and developments in optics and photonics.
Author:
Publisher:
ISBN:
Category : Military research
Languages : en
Pages : 452
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Book Description
