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Self-adaption video reconstruction method of single-frame coding image

A coding image, adaptive technology, applied in image communication, image enhancement, image data processing and other directions, can solve problems such as restricting the application of algorithms, and achieve the effect of increasing the accuracy of reconstructed images, saving time, and avoiding reconstruction errors

Inactive Publication Date: 2015-01-28
ZHEJIANG UNIV
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Problems solved by technology

From the results alone, the OMP algorithm based on KSVD dictionary training undoubtedly has higher reconstruction accuracy, but the reconstruction time required by the MP algorithm is often several times or even dozens of times that of the BP algorithm, and the time complexity is too high Seriously restrict the application of the algorithm

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with accompanying drawing.

[0035] In the process of single-exposure video reconstruction, the present invention uses the shot characteristics of moving objects in the image to adaptively search and reconstruct the moving region for the observed image obtained by the pixel equal-time-long exposure coding method, thus saving reconstruction time. Time required for non-moving areas. Flow process of the present invention is attached figure 1 As shown, it mainly includes several steps such as pixel coding exposure, adaptive motion region search and motion region video reconstruction.

[0036] Step 1. Pixel Encoding Exposure

[0037] 1-1 Divide the total exposure time T into N time segments on average, and the duration of each time segment is T / N.

[0038] 1-2 Control each pixel of the camera detector, and encode the exposure of each pixel in the time domain. Pixel encoding follows the principles of the...

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Abstract

The invention discloses a self-adaption video reconstruction method of a single-frame coding image. In the single exposure video reconstruction process, a self-adaption moving region search concept is introduced to an observation image obtained through a pixel equal-duration exposure coding method. Through the particulate characteristic represented by a moving object in the image, the moving region is found and reconstructed in a self-adaption mode, and therefore the time for reconstructing non-moving regions is saved, the time complexity of video reconstruction is lowered, and meanwhile the reconstruction errors caused when static backgrounds are reconstructed are avoided and the reconstruction image precision is improved.

Description

technical field [0001] The invention relates to an adaptive video reconstruction method of a single coded image. Background technique [0002] As a new application of Compressive Sensing (Compressive Sensing) theory, video compressed sensing technology can be used to improve the temporal resolution of the camera, that is, to obtain high-speed video from a low-speed camera. This type of method first performs exposure coding on each pixel in the time dimension, obtains the coded observation image by modulating the exposure time of the pixel, and then uses various reconstruction algorithms to reconstruct the observation image to obtain a series of video images, thereby increasing the temporal resolution of the camera. In terms of reconstruction algorithms, it is mainly divided into the basis pursuit (Basis Pursuit, BP) algorithm and the matching pursuit (Matching Pursuit, MP) algorithm. The former mainly includes TwIST, GAP and other algorithms, which use sparse measurement f...

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Application Information

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IPC IPC(8): H04N5/235G06T5/00
Inventor 陈跃庭唐超影徐之海李奇冯华君
Owner ZHEJIANG UNIV
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