Check patentability & draft patents in minutes with Patsnap Eureka AI!

Image acquisition method and device, and extended depth-of-field image imaging method and device

An image acquisition and depth-of-field extension technology, which is applied in image communication, TV, color TV components, etc., can solve problems such as low image acquisition efficiency, and achieve the effect of saving acquisition time, simple acquisition method, and improving efficiency.

Active Publication Date: 2022-03-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In view of this, the present invention provides an image acquisition method and acquisition device based on the dynamic zoom characteristics of liquid crystal lenses, and an extended depth-of-field image imaging method and imaging device based on the dynamic zoom characteristics of liquid crystal lenses, to solve problems existing in the prior art. The problem of low image acquisition efficiency in the extended depth of field technology

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Image acquisition method and device, and extended depth-of-field image imaging method and device
  • Image acquisition method and device, and extended depth-of-field image imaging method and device
  • Image acquisition method and device, and extended depth-of-field image imaging method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1 of the present invention discloses an image acquisition method based on the dynamic zoom characteristic of a liquid crystal lens, the image acquisition method adopts such as figure 1 and figure 2 The image acquisition device shown is used for acquisition. The image acquisition device includes a liquid crystal lens, a glass lens, and an image sensor from left to right. Face to face contact. The liquid crystal lens is located at the diaphragm position of the image acquisition device, and the focal length of the glass lens is 8mm.

[0058] The structure of the liquid crystal lens is as Figure 4 As shown, it includes a third substrate, a first ITO electrode, an ultraviolet glue, a Cr electrode, a second substrate, a liquid crystal layer, and a second ITO arranged in sequence along the light transmission direction of the lens (the light transmission direction is a direction perpendicular to the liquid crystal layer). electrodes and a first substrate. In ad...

Embodiment 2

[0077] Embodiment 2 of the present invention discloses an extended depth of field image imaging method based on the dynamic zoom characteristic of a liquid crystal lens. The imaging method includes two steps, the first step is image acquisition, and the second step is image fusion.

[0078] The first step image acquisition method of embodiment 2 is the same as the acquisition method in embodiment 1, the voltage V1 and V2 are adjusted to change the characteristics of the liquid crystal lens from the positive lens to the negative lens, and zoom from the beginning of the liquid crystal lens to the beginning of zooming of the liquid crystal lens In the last 4 seconds, the image sensor is controlled to collect an image every 1 / 15 second, and a total of 60 images are collected.

[0079] The mode of the second step image fusion of embodiment 2 is: carry out wavelet decomposition of N layers to all the images collected by the image sensor, obtain its high-frequency sub-image and low-fr...

Embodiment 3

[0082] Embodiment 3 of the present invention discloses a stereoscopic imaging method based on the dynamic zoom characteristics of liquid crystal lenses, which combines the image acquisition method in Embodiment 1 with the stereoscopic imaging method disclosed in the existing invention patent (publication number CN106454318A). The stereoscopic imaging method in 3 includes four steps, the first step is image acquisition, the second step is to collect the scene depth distribution map of the scene to be photographed, and the third step is to collect the parallax offset of the scene according to the scene depth distribution map The fourth step is to control the variable focus lens unit to focus on the region of interest of the scene according to the scene depth distribution map, and generate the first image of the stereoscopic image after image processing. The image acquisition method of the first step in embodiment 3 is the same as the acquisition method in embodiment 1.

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

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of optical imaging, solves the problem of low image acquisition efficiency in the extended depth of field technology, and provides an image acquisition method and device, and an extended depth of field image imaging method and device. The image acquisition method includes the following steps: the liquid crystal lens receives a first driving voltage; the first driving voltage received by the liquid crystal lens is switched to a second driving voltage; in response to switching from the first driving voltage to the second driving voltage, the liquid crystal lens zooms continuously ; Collect a series of images of different focus objects in the same scene during the zooming process of the liquid crystal lens. The present invention discovers the dynamic zoom characteristic of the liquid crystal lens. During the acquisition process, the liquid crystal lenses are respectively in the lens state and the imaging aberration is less than 0.1. Using this characteristic for dynamic image acquisition overcomes the technical prejudice that the liquid crystal lens cannot dynamically and continuously zoom. The invention does not need to wait for the liquid crystal lens to complete zooming to collect images, thereby improving the collection efficiency.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and specifically relates to an image acquisition method and acquisition device based on the dynamic zoom characteristic of a liquid crystal lens, and an extended depth-of-field image imaging method and imaging device based on the dynamic zoom characteristic of a liquid crystal lens. Background technique [0002] There are many studies on zooming through electronically controlled liquid crystal lenses, such as: [0003] The paper "Research on Super-resolution Performance and Axial Scanning Technology of Confocal System Based on Birefringence Principle" (Prior Art 1) published on June 1, 2009, studied the The focal length of the liquid crystal lens changes. [0004] Published on May 1, 2016, the paper "Research on Fabrication and Imaging Detection of Graphene-Based Liquid Crystal Microlens Array" (Prior Art 2), which selected multiple sets of different fixed voltage values ​​to observe and...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225H04N5/232H04N5/265
CPCH04N5/265H04N23/54H04N23/55H04N23/67H04N23/80
Inventor 叶茂陈晓西白一晨马嘉成
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com