System for real-time correction and splicing of image formed by fish-eye lens through using hardware circuit

Abstract

The invention discloses a system for real-time correction and splicing of an image formed by a fish-eye lens through using a hardware circuit. The system comprises an optical lens unit, an image sensor unit, an image correction and splicing unit, an image digital processing unit and an attachment unit, wherein the optical lens unit is formed by one or more of fish-eye lenses and is responsible for collecting a multi-channel optical image in one or more of directions; the image sensor unit is formed by one or more of CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) image sensors and is responsible for digitizing collection of the image shot by the fish-eye lens; the image correction and splicing unit is formed by general type programmable devices, such as an FPGA (Field Programmable Gate Array) or CPLD (Complex Programmable Logic Device), or a special integrated circuit realized by an ASIC (Application Specific Integrated Circuit) technology mainly, and attached SRAM (Static Random Access Memory) and FLASH storage device, and is responsible for distortion calibration, plane development and panoramic stitching of the image shot by the fish-eye lens; and the image digital processing unit is mainly responsible for carrying out encoding and compression processing on the image after correction and splicing and outputting a real-time panoramic video signal.

Description

technical field [0001] The invention relates to a system for real-time correction and splicing of images formed by a fisheye lens by using a hardware circuit. Background technique [0002] Fisheye lens is an ultra-wide-angle optical camera lens with a field of view close to or equal to 180°. Based on the extreme wide-angle characteristics of fisheye lenses, fisheye lenses have been widely used to replace traditional wide-angle lenses in the fields of video surveillance and driving recording; The structure is simpler, the lens used is less, and the cost is lower, and it has been focused on in the field of panoramic photography; in the field of higher video quality requirements, camera systems based on multiple fisheye lenses have also begun to be gradually developed. [0003] However, there is distortion in the imaging of the fisheye lens, and as the field of view increases, the distortion of the imaging will further increase. Generally, the distortion of the center part of...

AI Technical Summary

Problems solved by technology

Traditionally, using software to complete image correction or stitching in the later stage will consume a lot of processing time. Therefore, the software-based fisheye lens imaging system does not have real-time performance and can only be applied to recording and broadcasting systems.

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