Unlock instant, AI-driven research and patent intelligence for your innovation.

Projection focusing method based on camera and projector

A projector and camera technology, applied in the field of projection focusing, can solve the problems affecting the effect of autofocus, discounting the definition of projection screens, etc., to achieve the effect of ensuring the effect of autofocus and improving the definition

Inactive Publication Date: 2017-12-19
ZTE CORP
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventors of the present application found that in the prior art method of measuring the distance first and then focusing, since the projection screen is not judged whether it is flat before performing the distance measurement, when the projection screen has unevenness, it will affect the automatic focus. effect, resulting in greatly reduced clarity of projection onto the projection screen

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
  • Projection focusing method based on camera and projector
  • Projection focusing method based on camera and projector
  • Projection focusing method based on camera and projector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0082] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0083] In order to solve the problem in the prior art that the flatness of the projection is not judged during the automatic focusing process of the projector, so that the focusing effect is not good, and the clarity of the projected image is greatly reduced, the present invention provides a projection focusing method applied to the projector and projection system. The solution idea of ​​the present invention is: between measuring the projection distance between the projector and the projection plane, the present invention also judges whether the flatness of the projecti...

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 projection focusing method based on a camera and a projector. The method comprises the following steps of through double cameras, collecting initial image information of a projection plane of the projector; according to the collected initial image information, determining whether flatness of the projection plane accords with a preset flatness standard; if the flatness of the projection plane accords with the preset flatness standard, according to the initial image information, acquiring a projection distance of the projector and the projection plane and a focal length adjusting parameter corresponding to the projection distance; and according to the focal length adjusting parameter, carrying out focusing. By using the method and the projector, accuracy of the calculated projection distance between the projector and the projection plane can be guaranteed so as to ensure an automatic focusing effect and increase a definition of a projection image.

Description

technical field [0001] The invention relates to the technical field of projection focusing, in particular to a camera-based projection focusing method and a projector. Background technique [0002] A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play corresponding images or videos. Signal. Projectors are widely used in homes, offices, schools and entertainment venues. [0003] When using a projector, it is usually necessary to adjust the focus to ensure a clear picture of the image or video projected on the screen. When the current projector performs automatic focus adjustment, it usually uses a distance measuring device to measure the distance between the projector and the projection screen, and then reads the distance measured by the distance measuring device by a microprocessor, and then uses the distance measuring ...

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): G03B21/14
CPCG03B21/142G03B21/00
Inventor 姜伟
Owner ZTE CORP