Parameter design method of focusing type light field camera system

A technology of light field camera and parameter design, applied in the parts of TV system, parts of color TV, TV and other directions, can solve problems such as limiting spatial resolution, and achieve reasonable and effective effect of the system

Active Publication Date: 2021-01-15
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

However, light field cameras with this structure maximize the angular resolution of the light field image, thus limiting the spatial resolution

Method used

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  • Parameter design method of focusing type light field camera system
  • Parameter design method of focusing type light field camera system
  • Parameter design method of focusing type light field camera system

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Experimental program
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Embodiment

[0052] In this embodiment, it is assumed that a focus-type light field camera applied in the long-wave infrared band is selected. Suppose the parameters of this focusing light field camera are as follows: working distance 20-100m, detector resolution 640*480, pixel size 15um, imaging main wavelength 10um, main lens focal length 100mm, main lens F-number 1.2.

[0053] Then the parameter design method of the focused light field camera system that meets the above requirements includes the following steps:

[0054] Step S100, determine the allocation relationship between the spatial resolution and the angular resolution of the focused light field camera, and use M to represent the ratio of the object-to-image distance in the microlens imaging space, that is,

[0055]

[0056] see figure 1 , because the ratio of the object-to-image distance in the microlens imaging space controls the distribution of spatial and angular resolution, and its value also limits whether the depth val...

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Abstract

The invention relates to a parameter design method of a focusing type light field camera system, and belongs to the field of computational imaging. By utilizing the characteristic of flexible structure of the focusing type light field camera, the influence condition of internal geometrical parameters of the light field camera on the imaging effect of the system is obtained from resolution analysisof a light field image, so that proper system structure parameters are selected according to actual requirements, the performance of an existing detector and an existing optical structure is utilizedto the maximum extent, and the design of the system is completed. Through a geometrical optics principle, an imaging relationship between a main lens and a micro lens array is analyzed, distributionof space and angle resolution is determined through a ratio of micro lens imaging object distances, and system design parameters of the focusing type light field camera are obtained through comprehensive consideration by combining analysis of depth resolution and an imaging depth range. According to the design method provided by the invention, a corresponding design scheme can be provided for thefocusing type light field camera in different application scenes, and a theoretical basis is provided for the focusing type light field camera in the aspect of calculation of light field depth estimation precision.

Description

technical field [0001] The invention relates to the field of computational imaging, in particular to a parameter design method of a focused light field camera system. Background technique [0002] With the rapid development of computational imaging, obtaining 3D information through light field imaging has attracted some attention in recent years. The light field, that is, the field distribution of light radiating in space, is a high-dimensional data. Therefore, after the light field data is collected, the required information can be extracted from it, such as three-dimensional information in space. [0003] As one of the representatives of the light field imaging system, the light field camera based on the microlens array was proposed by E. Adelson et al. in 1992. This camera is also called a plenoptic camera (Plenoptic Camera). In 2005, R.Ng and others improved the process so that the microlens and the detector can be directly coupled, eliminating the need for a relay syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232
CPCH04N23/675H04N23/67H04N23/80
Inventor 刘旭朱斐越
Owner ZHEJIANG UNIV
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