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Image rotation and translation measurement based on double phase-encoded joint transform correlator
1State Key Laboratory of Modern Optical Instruments, Zhejiang University, Hangzhou, China.
Applied Optics
|September 28, 2011
Summary
This study introduces a novel double phase-encoded joint transform correlator (DPEJTC) for precise image rotation and translation measurement. The DPEJTC technology enables accurate detection of both rotation and translation in digital images.
Area of Science:
- Optical Engineering
- Image Processing
- Signal Processing
Background:
- Accurate measurement of image rotation and translation is crucial for various applications.
- Existing methods may face limitations in precision or complexity.
Purpose of the Study:
- To propose and verify a new technology for measuring image rotation and translation.
- To utilize a double phase-encoded joint transform correlator (DPEJTC) for enhanced measurement accuracy.
Main Methods:
- Fourier transformation of reference and target images.
- Application of a high-pass emphasis filter and transformation to polar space.
- Measurement of rotation using DPEJTC in polar coordinates.
- Correction of rotation and subsequent translation measurement using DPEJTC.
Main Results:
- Digital computations successfully verified the proposed image rotation and translation measurement technology.
- The DPEJTC demonstrated effective measurement of both rotation and translation parameters.
Conclusions:
- The proposed DPEJTC-based method provides a viable solution for accurate image rotation and translation measurement.
- The study suggests a potential optical setup for practical implementation.
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