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CDB97 wavelet transformation real-time image fusion method based on field programmable gate array (FPGA) hardware

A real-time image, wavelet transform technology, applied in image enhancement, image data processing, instruments and other directions, can solve the problem of not fundamentally solving real-time performance

Inactive Publication Date: 2011-10-05
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] At present, the hardware fusion method usually adopts the DSP processor, which is essentially a sequential execution method and does not fundamentally solve the real-time problem.

Method used

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  • CDB97 wavelet transformation real-time image fusion method based on field programmable gate array (FPGA) hardware
  • CDB97 wavelet transformation real-time image fusion method based on field programmable gate array (FPGA) hardware
  • CDB97 wavelet transformation real-time image fusion method based on field programmable gate array (FPGA) hardware

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Embodiment Construction

[0051] In the present invention, a 4096x 16-level TDI-CCD and a 2048-element infrared focal plane array are used for real-time acquisition and fusion experiments. Used in the experiment: the control of the optical-mechanical system adopts the console of Zolix Company to drive the two detectors and the push-broom of the optical system; the fusion of two-channel heterogeneous images is implemented in the Spartan3A XC3SD1800A series FPGA hardware of Xilinx Company using Verilog HDL; The machine console software is written by Visual C++6.0, and the image data before and after fusion is collected and received through the 68013A interface chip of Cypress Company.

[0052] The preparation of the platform before the experiment is as follows: the two detectors are placed vertically on the turntable through the support of the mechanical mechanism, and the rotation speed is set through the control software of the upper computer Zolix; the USB transmission line is connected to the PC and t...

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Abstract

The invention discloses a CDB97 wavelet transformation real-time image fusion method based on field programmable gate array (FPGA) hardware. By a CDB97 biorthogonal wavelet lifting scheme, images output by different detectors are dissected and reconstructed, and the implementation complexity of the hardware is simplified. When the hardware processes floating-point number operation, the real-time fusion of heterologous images is realized by an addition and multiplication operation method under a simplified A (1,6,5) floating-point number standard on the premise of meeting the wavelet forward and inverse transformation precision. By the method, the hardware processing speed of an FPGA is full exerted on the basis of meeting the fusion precision and the real-time fusion of the heterologous images is realized by using the CDB97 biorthogonal wavelet lifting scheme and combining the simplified A (1,6,5) floating-point number standard.

Description

technical field [0001] The invention relates to a real-time fusion method of images output by a dual-channel detector, in particular to a CDB97 wavelet transform real-time image fusion method realized based on FPGA hardware. Background technique [0002] In the field of image processing, fusing heterogeneous images from different sensors is an important way to increase the amount of information. Image fusion has a wide range of applications in the detection of hidden weapons, medical diagnosis, remote sensing images and other fields. These fields have high requirements for real-time performance. However, the current research on image fusion mostly stays in the research of algorithms, and there are many problems in hardware implementation, such as the fusion algorithm itself is too complex, the fusion rules are too cumbersome, data scheduling is difficult, the amount of intermediate data is too large, and the effective word length effect and other problems. [0003] Among t...

Claims

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Application Information

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IPC IPC(8): G06T5/50G06T1/20
Inventor 赵明林长青吴泳澎
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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