Double-exposure video imaging system based on dynamic scene

Abstract

The invention discloses a double-exposure video imaging system based on a dynamic scene. The system comprises a double-exposure image collection module which is used for obtaining first sequence imagedata through controlling the exposure time, and the first sequence image data comprises a plurality of frames of first exposure images; an image transmission module, connected with the double-exposure image acquisition module and used for acquiring first sequence image data and performing fixed-interval frame extraction processing on the first sequence image data to obtain second sequence image data; and an image processing module, connected with the image transmission module and used for acquiring the second sequence image data and carrying out fusion processing on two adjacent second exposure images in the second sequence image data to obtain a fused image. According to the double-exposure video imaging system provided by the invention, high-exposure sequence images and low-exposure sequence images can be alternately acquired in sequence. Therefore, the problems that an existing HDR photographing or camera shooting system cannot process dynamic scene moving object information, a fused image generates a false contour due to the fact that the brightness information difference of different exposure images is too large, and detail information of the fused image is lost are solved.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a dynamic scene-based double-exposure video imaging system. Background technique [0002] Dynamic range is generally the ratio of the brightness values ​​of the brightest and darkest parts of a scene. Generally, when taking pictures with ordinary photographic equipment such as cameras or mobile phones, the dynamic range of the obtained pictures is far lower than that contained in the real scene. See Figure 1a~1b , Figure 1a It is a low dynamic range (Low Dynamic Range, LDR) image, and the dynamic range is generally 10 2 about, Figure 1b It is a high dynamic range scene (High Dynamic Range, HDR) image, and the dynamic range can reach 10 6 brightness level. Therefore, when an image is taken, the darker or brighter areas in the real scene will appear saturated in the captured image, that is, completely black or completely white (commonly known as underex...

AI Technical Summary

Problems solved by technology

Hardware-based single-exposure capture realizes simultaneous exposure bracketing on a single imaging sensor, which sacrifices the spatial resolution of the image, and the captured dynamic range is far below the perceivable dynamic range of the human visual system.

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