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High-altitude infrared imaging method based on multi-element surface array splicing

An infrared imaging and area array technology, which is used in radiation pyrometry, image enhancement, image data processing, etc. Effect

Inactive Publication Date: 2008-03-19
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

The disadvantage is that the image is distorted by the attitude of the aircraft
[0006] These three imaging methods are technically mature and can meet the needs of infrared system design in certain application fields, but cannot meet the requirements of system design under the requirements of high altitude high sensitivity and wide field of view

Method used

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Embodiment Construction

[0027] A high-altitude airborne infrared camera imaging method based on multi-element array stitching of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments:

[0028] The specific parameters of the infrared camera are as follows:

[0029] Total field of view: 45°;

[0030] Flight altitude: 12,000-20,000 meters high;

[0031] Number of pixels: 320×256 yuan;

[0032] Instantaneous field of view: 0.1mrad;

[0033] Band: 3 ~ 5um;

[0034] Temperature sensitivity: better than 0.1K;

[0035] Optical system diameter: 100mm.

[0036] 1. Oscillating mirror 1 is made of aluminum-magnesium alloy metal mirror, which is driven by a high-precision motor to complete the spatial scanning of the instantaneous field of view of the camera. The scanning angular velocity curve of the pendulum mirror is shown in Figure 3, and the position curve of the pendulum mirror is shown in Figure 4. The drive motor of the swing m...

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Abstract

The invention discloses an altitude infrared imaging method based on a multi-element area array splicing. An area array picture frame type imaging is adopted, a large breadth is gained through the object space scan on the passing rail direction of a swing mirror, the swing mirror works in a scanning and gazing imaging mode, the infrared area array detector images by exposure when the swing mirror is at the gazing position, the overlapping ratio between two adjacent images is kept 10 percent and above, the splicing of the adjacent images adopts the measure algorithm of the correlation function in image matching, and the seamless splicing of the images is ensured. The imaging method improves the integration time of the system, and efficiently improves the sensibility of the infrared system, and the picture frame type imaging solves the severe distortion of the image caused by the posture affection of a plane. The invention solves the technological problems of the high resolution, the large breadth, and the high sensitivity of an altitude on-board infrared camera.

Description

technical field [0001] The invention relates to a remote sensing imaging method for a high-altitude airborne infrared camera, in particular to an imaging method using multi-element array splicing. Background technique [0002] Infrared cameras mainly have three imaging methods, as shown in Figure 1: [0003] Sweeping mode: The detector adopts a unit device, and the imaging in the direction of the track is realized by the scanning mechanism, while the movement of the aircraft realizes the imaging in the direction of the track. This method can realize large field of view imaging with the least number of detector pixels. However, due to the use of object-space mechanical scanning, the volume is large and the dwell time of pixels is short, which is not conducive to improving the detection sensitivity of the system. [0004] Push-broom method: the detector adopts multi-element devices (area array or linear array), and multiple pixels are simultaneously imaged in the direction o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/20G01J5/08G06T5/00
Inventor 于龙王建宇舒嵘毛闵军毛洁娜
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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