And data calibration system and iris image acquisition system are focused.

A calibration system and data technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of limited iris acquisition range and small lens adjustable range, and achieve the effect of large image acquisition range and simple processing method

Pending Publication Date: 2021-04-13
BEIJING IRISKING
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the VCM drive current has an upper limit limit, and the adjustable range of the lens is small, resulting in a limited iris collection range

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
  • And data calibration system and iris image acquisition system are focused.
  • And data calibration system and iris image acquisition system are focused.
  • And data calibration system and iris image acquisition system are focused.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0040] It should be noted in advance that the descriptions of the following embodiments or examples or the features mentioned therein can be combined with the features in other embodiments or examples in the same or similar manner, or replace the features in other embodiments or examples , to form a possible implementation. In addition, the term "comprising / comprising" used herein refers to the presence of features, elements, steps or components, but does not exclude the presence of one or more other features, elements, steps or components.

[0041] For the convenien...

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 provides a focusing data calibration system and an iris image collection system, and the system comprises an object distance measurement device which is used for measuring the distance between a lens of a camera and a collection object marker, and obtaining the object distance of the camera; a constant current source circuit module used for receiving the controllable constant voltage and outputting a constant current to control the voice coil motor to act; and a processing module used for obtaining focusing data of the camera focused by the voice coil motor according to the focusing data points corresponding to the plurality of object distances. According to the scheme, the image acquisition equipment can be miniaturized, and meanwhile, a relatively large image acquisition range can be ensured.

Description

technical field [0001] The invention relates to the technical field of iris imaging, in particular to a focus data calibration system and an iris image acquisition system. Background technique [0002] With the development of iris imaging technology, the imaging distance of iris camera has developed from the initial single distance to 10cm, 15cm or even a wider range of depth of field, laying the foundation for expanding the range of acquisition distance. However, the optical imaging system of the traditional long-distance iris collection device generally adopts a zoom system, and the lens is moved by a motor to change the imaging distance, which is bulky and expensive. [0003] In order to use a convenient and miniaturized iris collection device, a fixed-focus system is intelligently applied, and a small voice coil motor (VCM for short) is used to drive the lens to reduce the size of the device. However, the VCM drive current has an upper limit limit, and the adjustable ra...

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 Applications(China)
IPC IPC(8): G06K9/00G06T7/80G02B7/09G02B7/36G03B13/20
CPCG06T7/80G02B7/09G02B7/36G03B13/20G06T2207/30244G06T2207/30201G06V40/19
Inventor 刘京李言王琨王雅丽
Owner BEIJING IRISKING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap