Active illumination non-vision-field secondary penumbra imaging method

Abstract

The invention discloses an active illumination non-vision-field secondary penumbra imaging method, and belongs to the field of optics. The invention solves the problem of how to carry out accurate image reconstruction under the condition that the light intensity of the target object is weak or the target object is inactively luminous in the existing penumbra imaging technology based on the transmission window. The imaging method comprises the following steps: selecting and collecting light after the third scattering of a receiving surface through a gating camera so as to obtain light field intensity distribution y of the light after the third scattering of the receiving surface; acquiring a forward transmission matrix A of the target object by using the physical positions of the target object and the secondary penumbra in the scene; and by using the light field intensity distribution y and the forward transmission matrix A, solving an optimal solution of the light field intensity distribution scattered by the target object, and reconstructing an image of the target object after a penumbra-removing illumination solution operation. The method is mainly used for image reconstruction of target objects with weak light intensity and non-active light-emitting target objects.

Description

technical field [0001] The invention relates to the field of optical imaging. Background technique [0002] Non-line-of-sight imaging is a computational imaging method for objects outside the field of view. This method collects the light field information of objects scattered or reflected into the surrounding scene multiple times, and uses this information to indirectly restore the image of the target. [0003] It often happens that objects in search and rescue operations are in confined spaces and cannot be detected due to large areas of occlusion. [0004] In recent years, with the gradual development of non-line-of-sight imaging technology, a passive non-line-of-sight penumbra imaging technology based on a transmission window has been developed in response to the above situation. Existing passive non-line-of-sight penumbral imaging models based on transmission windows, such as figure 1 Shown: This model uses a transmission window in front of the target to form a penumbr...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of how to perform accurate images under the condition of weak light intensity of the target object or non-active light emission of the target object in the existing penumbral imaging technology based on the transmission window To solve the problem of reconstruction, the present invention provides an active illumination non-view quadratic penumbra imaging method

Images