Double-exposure video imaging system based on dynamic scene

An imaging system and dynamic scene technology, applied in the field of image processing, can solve the problems of sacrificing image space resolution, dynamic range not reaching the dynamic range of human visual system, etc.

Active Publication Date: 2019-12-27
XIDIAN UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

Hardware-based single-exposure capture realizes simultaneous exposure bracketing on a single imaging sensor, which sacrifices the sp

Method used

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  • Double-exposure video imaging system based on dynamic scene
  • Double-exposure video imaging system based on dynamic scene
  • Double-exposure video imaging system based on dynamic scene

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Embodiment 1

[0054] At present, Park Yongjie et al. use multiple exposures for high dynamic range video acquisition, which requires fast fusion of multiple low dynamic range images, and proposes an improved fast multi-resolution tower decomposition fusion algorithm, without reducing the original Under the premise of algorithm fusion quality, the amount of calculation is greatly reduced. The algorithm is improved from the aspects of pyramid decomposition convolution kernel, Gaussian coefficient expansion interpolation method, Laplacian coefficient fusion rule, Gaussian coefficient fusion rule, etc., which simplifies the process of pyramid decomposition, fusion and reconstruction. This method is applied in a video acquisition system of a launch vehicle, and its algorithm has strong stability, and at the same time reduces the amount of calculation in the process of image fusion. This system is a fusion algorithm for static scenes, which will indiscriminately fuse images with moving objects in...

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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...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06T5/50G06T7/155H04N5/235
CPCG06T1/0007G06T5/50G06T7/155G06T2207/10016G06T2207/20221H04N23/73Y02D10/00
Inventor 赵小明宗靖国李英王文超王子吴昌辉王星量高苗
Owner XIDIAN UNIV
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