| Invariant Joint Transform CorrelatorⅠ: Mapping Filter |
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| 作者姓名： | FENG Jihong WU Minxian JIN Guofan YAN Shuhua |
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| 作者单位： | Tainghua University，Precision Department，100084 Beijing，China |
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| 基金项目： | Supported by the National Natural Foundation of China and "863" High Technology Program. |
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| 摘 要： | l.IntroductionAVanderLugtcomp1exlnatchingspatialcorreIator1jandajointtransformcorrela-torz~ejaret``omaJorkindsofcorrelators,however,theyaresensitivetoscalingandro-tationvariance.Thisdisadvantageisaseverelimitationforthemtobeusedinpracticalapplications-Invariantprocessingwiththeclassicalopticalcorre1atorwithproPertiesotherthanPOsitiondemandsthatthepropertyisrepresentedasashift.WithaIog-POlarmafrping="j,thesizeandorientationw'il1beexpressedasshiftparameters,orratherrotationascyc1icshift.…
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| 收稿时间： | 1995/10/23 |
Invariant Joint Transform CorrelatorⅠ: Mapping Filter |
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| FENG Jihong,WU Minxian,JIN Guofan,YAN Shuhua.Invariant Joint Transform CorrelatorⅠ: Mapping Filter[J].中国激光(英文版),1997,6(1):64-70. |
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| Authors: | FENG Jihong WU Minxian JIN Guofan YAN Shuhua |
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| Abstract: | A joint transform correlator incorporating coordinate transformation technique is propescd to perform invariant pattern recognition. Instead of an input image or its Fourier transform intensity, the Fourier transform of the input image is directly transformed from rectangular into logarithmic-polar coordinate. All of information is saved, and as a result, multiple objects can be proceased simulataneously. A binary optical component is designed and fabricated to perform coordinate transformation in high efficiency. |
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| Keywords: | invariant optical pattern recognition cyclic shift joint transform correlator binary optical component |
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