Omni-directional imaging device and method

Abstract

The invention discloses an omni-directional imaging device and method. The omni-directional imaging method comprises the steps of: dividing a circular big imaging surface formed by a specially designed long-focus big imaging surface reflex type panorama annular lens on a plane or a spherical surface into multiple sector-shaped sub-imaging surfaces averagely; delivering each sub-imaging surface or each expanded sub-imaging surface to a corresponding image sensor through a conical optical fiber panel with the size matching with that of each sub-imaging surface; unfolding the images received by all the image sensors into rectangular images and splicing the images according to the sequence thereof on the circular imaging surface so as to obtain an omni-directional image by utilizing an image processing unit; and finally sending the omni-directional image to the display unit for displaying. As the conical optical fiber panel and the long-focus big imaging surface reflex type omni-directional annular lens are combined, real-time 360-degree panorama omni-directional imaging of a big imaging surface is realized; as multiple image sensors are utilized for image splicing, a bigger image surface can be obtained; and an image resolution rate of an edge part of a field of view can be increased.

Description

technical field [0001] The present invention relates to a panoramic imaging device and method, in particular to a panoramic ring imaging device and method. Background technique [0002] Optical fiber panel refers to a plate-shaped image transmission element whose thickness is smaller than the cross section. It is made of tens of millions of regular optical fiber composite filaments closely arranged and then processed by melting, pressing, cutting and other processes. The input and output ends of the optical fiber panel are in the Geometrically one-to-one correspondence, each optical fiber transmits an image point, thus playing the role of image transmission. Optical fiber cone, that is, tapered optical fiber panel, is a rectangular or cylindrical optical fiber panel blank of a certain length, which is drawn into a cone shape by special heating and drawing equipment, and then after annealing, it is cut into different magnifications according to different magnifications. coni...

AI Technical Summary

Problems solved by technology

However, due to the structure of the first reflector of the catadioptric panoramic ring lens, the light in the middle field of view is inevitably blocked by the first reflector and cannot enter the subsequent light group, resulting in a With a circular image surface, the pixels in the middle cannot be fully utilized and become blind spots

Generally speaking, the larger the circular imaging surface of the catadioptric panoramic ring lens, the larger the blind area, and the more pixels are wasted on the image sensor. This is the biggest shortcoming of the catadioptric panoramic ring lens.

[0004] On the other hand, due to the ultra-wide-angle characteristics of the catadioptric panoramic ring lens, the size of the image of an object with a large peripheral field of view on the image sensor is severely compressed, which is limited by the size of a single CCD\CMOS image sensor, especially In the current CCD\CMOS image sensor size can not be made too large, and the large-size CCD\CMOS is expensive, the severely compressed image is limited to a single CCD\CMOS image sensor, resulting in CCD\CMOS The resolution of the image at the edge of the image sensor is low, which cannot reflect the details of objects at the edge of the field of view well

[0005] Chinese invention patent CN201110331166.8 discloses a panoramic telescopic combined imaging system and method using a panoramic annular lens, using a telescope group and a panoramic annular lens located on the same optical axis to view the scene corresponding to the annular image plane through the telescope The group and the panoramic lens are enlarged and imaged in the blind area to improve the pixel utilization of a single sensor and realize the dual functions of panorama and telephoto at the same time, but the size of its imaging surface is still limited by the size of a single CCD or CMOS image sensor. Moreover, the combined design of the telescope group and the panoramic ring lens, and the rotating scanning mechanism of the telescope group have brought great difficulties to the optical and mechanical design, processing and system assembly.

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