Assessment device of pneumatic optic transmission effect based on sequence image correction
A technology of aero-optics and transmission effects, applied in the field of interdisciplinary science, can solve the problems of low efficiency of multi-machine parallelism, complex and large system, and low integration level, so as to shorten the time of simulation function, overcome the limited computing performance, and expand strong effect
Inactive Publication Date: 2010-06-02
HUAZHONG UNIV OF SCI & TECH
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The advantage is that the computing performance is improved, and the disadvantage is that the system is complex and huge, and the integration level is not high. Due to the bottleneck of Ethernet data communication bandwidth, the efficiency of multi-machine parallelism is not high, and it cannot receive external camera data directly input, and cannot perform real-time correction evaluation.
[0022] The above calculation method is suitable for offline restoration and correction of high-speed flow field degradation images. It is inconvenient to carry, cannot realize real-time correction, and is inconvenient to carry to the experimental site
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[0055] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples.
[0056] like figure 1 As shown, the evaluation method of the present invention comprises the following steps:
[0057] (1) Collect the aero-optical test image g(x, y), where (x, y) represent the pixel coordinates in the image height and width directions, respectively;
[0058] The collected images can be aero-optical effect sequence image data obtained in a wind tunnel test, or aero-optical transmission effect image data obtained by using a high-speed aircraft to carry an imaging detector during high-speed flight.
[0059] (2) Correct the collected aero-optical test image g(x, y);
[0060] The unknown reference image f(x, y) and the point spread function h(x, y) are estimated by using the image correction algorithm for the collected aero-optical test image g(x, y). The estimated corrected image and point spread function are respectively and ...
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The invention discloses an assessment device of a pneumatic optic transmission effect based on sequence image correction. The assessment device comprises an upper computer, a multi-functional image acquisition control card and a parallel digital signal coprocessing card; wherein the upper computer and the multi-functional image acquisition control card are mutually connected through an interface bus of high speed external equipment; the multi-functional image acquisition control card and the parallel digital coprocessing card are mutually connected through an external expansion interface among plates. By utilizing the characteristics of high parallelism property of computation and an expandable processing unit of the assessment device, the quantity of computation processing units can be selected flexibly to achieve a real-time property of the processing. The device has small size, light weight and easy carrying.
Description
technical field [0001] The invention belongs to the interdisciplinary field of science and technology combining aero-optics, image processing and measurement technology, and in particular relates to a method and device for evaluating aero-optical transmission effects based on sequence image correction. Background technique [0002] Aero-optics is a discipline that studies the influence of high-speed flow around the imaging detection of high-speed aircraft and its correction. When a high-speed aircraft with an optical imaging detection system flies in the atmosphere, a complex flow field is formed between the optical head cover and the incoming flow, which causes thermal radiation and light transmission interference to the optical imaging detection system, causing scene image shift, jitter, Blur, this effect is called aero-optical effect. When the optical imaging detection system carried by the high-speed aircraft flies in the atmosphere, the violent interaction between the ...
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Inventor 张天序洪汉玉钟胜颜露新刘纯胜付长江符俊杰张泽彬陈荣华王进汪小平
Owner HUAZHONG UNIV OF SCI & TECH