Passive non-visual-field penumbra imaging method based on transmission window

Abstract

The invention discloses a passive non-visual-field penumbra imaging method based on a transmission window, and relates to the field of optical imaging. The problem that the application range of an existing passive non-vision-field imaging system is limited is solved. The method comprises the steps that 1, a light-emitting target object enters a receiving surface through a transmission window in ashielding object, a penumbra is formed on the receiving surface, an image of the penumbra formed on the receiving surface is collected through a camera, and the collected image is sent to an upper computer; 2, the upper computer obtains a penumbra intensity vector y according to the received image; 3, a forward transmission matrix A of the target object is obtained according to the physical positions of the target object and the penumbra in the scene; 4, an intensity vector f of the target object is obtained according to the obtained penumbra intensity vector y and the forward transmission matrix A; and 5, a target object image f'is obtained according to the intensity vector f of the target object. The method is mainly used for image reconstruction of the target object.

Description

technical field [0001] The invention relates to the field of optical imaging. Background technique [0002] In various complex scenes such as urban buildings, urban underground pipelines, wild vegetation coverage areas, and disaster areas after earthquakes, objects such as walls, street corners, obstacles, and vegetation often form rigid blocks for light. Under such circumstances, the field of view of traditional imaging systems is almost completely lost, and imaging of the target is almost impossible. [0003] In recent years, driven by the rapid development of computational optical imaging, an emerging research field, non-line-of-sight imaging technology has been developed specifically for the above situations. The non-line-of-sight imaging technology can reconstruct the image of the target by capturing the scattered light or reflected light formed by the target light in the surrounding scene. For details, see figure 1 . [0004] Non-line-of-sight imaging means that whe...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of limited application range of the existing passive non-line-of-sight imaging system, and the present invention provides a passive non-line-of-sight penumbra imaging method based on a transmission window

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