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Rotary coded aperture imaging system based depth estimation method

A technology of rotary encoding and imaging system, which is applied in digital image processing, computational photography, and computer vision. It can solve the problems of color image information distortion and complex application.

Inactive Publication Date: 2016-04-06
TIANJIN UNIV
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Problems solved by technology

In the previous work on depth estimation based on out-of-focus blur, single-encoded aperture, coded-aperture pair, or color aperture, there are problems such as depth estimation and full-focus image restoration, complex practical applications, or color image information distortion.

Method used

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  • Rotary coded aperture imaging system based depth estimation method
  • Rotary coded aperture imaging system based depth estimation method
  • Rotary coded aperture imaging system based depth estimation method

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Embodiment Construction

[0052] The technical scheme adopted by the present invention is a depth estimation method based on a rotary coding aperture imaging system. The performance evaluation standard of the rotary encoding aperture imaging system is proposed, and the genetic algorithm and the coordinate descent method are used to optimize the rotary encoding aperture according to the evaluation standard, and then the depth estimation and all-focus image restoration are realized with the help of the optimized rotary encoding aperture system. When the rotary-encoded aperture imaging system estimates the depth of visible light images, it needs to use the point spread function corresponding to each depth level, that is, the difference of point spread function at different depths is the main index parameter for distinguishing depth. Therefore, the key issue to achieve accurate depth estimation is that the point spread function of the rotary encoding aperture imaging system has excellent discrete performanc...

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Abstract

The invention belongs to the technical field of computer vision. A rotary coded aperture mode is provided, so that obtained depth information is accurate and high in precision, and full-focus restored image quality is improved; and meanwhile, an imaging system is convenient in usage mode and high in stability. For achieving the purpose, the technical scheme adopted by the invention is that a rotary coded aperture imaging system based depth estimation method comprises the following steps: proposing a performance evaluation standard of the rotary coded aperture imaging system; optimizing a rotary coded aperture by using a genetic algorithm and a coordinate descent method according to the evaluation standard; and performing depth estimation and full-focus image restoration operations by virtue of the optimized rotary coded aperture. The method is mainly applied to the image processing.

Description

technical field [0001] The invention belongs to the technical field of computer vision. Specifically, it mainly involves the fields of digital image processing and computational photography, and it is a depth estimation method based on a rotary-encoded aperture imaging system. Background technique [0002] Modern society has higher and higher requirements for the image quality of digital imaging equipment, and expects to obtain full-clear images. However, the development of optical imaging systems has not been able to completely solve the problem of defocus blur. The basic imaging principle of traditional optical imaging equipment is that the concave-convex lens changes the direction of light, and this characteristic is used to design imaging equipment. Therefore, the distance between the object plane of the object to be photographed and the objective lens has certain selectivity. If the object to be photographed is located on the focal plane of the imaging system, then th...

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Application Information

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IPC IPC(8): G06T7/00G06T5/00
CPCG06T2207/10004G06T5/00
Inventor 杨敬钰马金龙姜斌
Owner TIANJIN UNIV
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