Synthetic aperture radar complex numeric image data real time automatic compression method

A synthetic aperture radar, image data technology, applied in image data processing, image coding, reflection/re-radiation of radio waves, etc., can solve problems such as low efficiency, complex coding operations, and inability to parallelize coding, and reduce the data rate. , The quantization operation is simple, and the effect of real-time compression is satisfied.
CN1664860AInactive Publication Date: 2005-09-07宁波欧德意物联科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
宁波欧德意物联科技有限公司
Publication Date
2005-09-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention provides a SAR complex image data real-time compressing method, comprising the following steps: first, dividing complex image into several blocks, compressing and encoding each unit of sub-block, two-dimension Fourier transforming the every sub-block, using sciagraphy to analyze transformed data to defining non-zero coefficient and its zone, quantizing non-zero coefficient; second, differential encoding position information in non-zero zone and setting it in the head of code stream, separately grid coding quantizing real part and imaginary part then through arithmetic encoding to form terminal code stream. The invention is characterized in meeting request of real-time and automatically compressing complex image data in space-borne system and high fidelity of phase.
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Description

technical field

[0001] The invention relates to a method for compressing complex image data, in particular to a method for real-time automatic data compression of synthetic aperture radar complex images. Background technique

[0002] Synthetic Aperture Radar (SAR) is an earth observation system that uses microwave imaging. It is a high-resolution imaging radar system that is widely used in disaster monitoring, resource exploration, marine research, military reconnaissance and many other fields. .

[0003] Such as figure 1 A block diagram of the signal processing for a typical synthetic aperture radar. The signal processing flowchart includes:

[0004] The signal S(t)1 received by the radar is orthogonally separated 2 into I-phase and Q-phase signals, and then converted into digital signals through the A / D converter 3, and the complex signal composed of I-phase and Q-phase digital signals is matched The filter 4 processes and obtains the complex image data 5 of the SAR (t...

Claims

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