Digital focusing method and digital focusing device used for optical field imaging

A technology of light field imaging and focusing method, which is applied in the direction of image communication, color TV parts, TV system parts, etc. It can solve the problems of large amount of calculation, long calculation time, and complex calculation, and reduce the amount of data , time-saving effect
CN101562701AInactive Publication Date: 2009-10-21BEIHANG UNIV
0 Cites 27 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2009-10-21
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a digital focusing method and a digital focusing device used for optical field imaging. The method comprises the following steps: selecting a window range of a target from a two-dimensional optical field image, and extracting optical field data in the window range; according to different focusing parameters, performing target image reconstruction to obtain an image sequence; and performing image definition evaluation on the image sequence, and finding an optimal focusing parameter value so as to obtain a refocusing image with optimal target definition. The method and the device reduce quantity of data participating in the image reconstruction, thereby saving time for digital focusing.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to an imaging method and device, in particular to a digital focusing method and device for light field imaging. Background technique

[0002] The concept of light field imaging was proposed and developed by Marc Levoy and Ren Ng et al. It mainly refers to obtaining the spatial distribution of the target light radiation and the direction information of radiation transmission by using aperture segmentation or adding a modulation mask in the traditional optical imaging system, that is, the four-dimensional light field in the camera. By calculating and processing the light field data, a composite image refocused on a specified depth target is obtained, and digital focusing is realized.

[0003] The light field distribution in the camera can be expressed by the optical flow between two planes, such as figure 1 As shown, the plane (u, v) is the pupil plane of the imaging system, the plane (x, y) is the detector plane, and the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More