Image acquisition device and method for judging re-execution of automatic focusing thereby

An image acquisition device and auto-focus technology, applied in image communication, color TV parts, TV system parts, etc., can solve the problems of low auto-focus action sensitivity, inability to analyze network camera sensitivity, dizziness, etc. To achieve the effect of avoiding too frequent focusing actions

Inactive Publication Date: 2011-04-20
PRIMAX ELECTRONICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing autofocus control rules applied to network cameras cannot effectively and objectively analyze the sensitivity of network cameras.
For example, when the threshold set in the autofocus control law is too high, if the environment in the video conference is just a simple shaking of any object (cup, notebook, stationery, etc.), it will also cause the network camera to re-execute autofocus In this way, it will cause visual discomfort and even dizziness to the participants participating in the meeting; but if the threshold value set in the AF control law is too low, it will make the AF action sensitivity Too low, causing the webcam to fail to effectively focus on the video environment

Method used

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  • Image acquisition device and method for judging re-execution of automatic focusing thereby
  • Image acquisition device and method for judging re-execution of automatic focusing thereby
  • Image acquisition device and method for judging re-execution of automatic focusing thereby

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Embodiment Construction

[0027] First, to explain how video conferencing works, see figure 1 , which is a schematic diagram of a video conference in a preferred embodiment of the present invention. The video conference includes a plurality of participants 101 and 302, wherein the participants 101 and 302 are located at different locations. figure 1 Participant 101 is located in the conference room at terminal A, while participant 302 is located in the conference room at terminal B. The A-side conference room includes a conference table 100 and an image capture device 102 for capturing images of the A-side environment, wherein the A-side environment images include A-side conference participants 101 and any items 103 that must be used in the meeting. The image acquisition device 102 can be a network camera, and is connected with the computer 104, so the image collected by the network camera can transmit the image of the A terminal to the computer screen 301 of the B terminal through the computer 104 an...

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Abstract

The invention relates to an image acquisition device and a method for judging re-execution of automatic focusing thereby. The image acquisition device comprises an image sensor, a register and a back-end chip, wherein the back-end chip judges whether the image acquisition device re-executes the automatic focusing action by using automatic exposure value variation and automatic gain value variation in a focusing environment. The invention has the advantages of preventing over-frequent focusing action of the image acquisition device and effectively focusing the image acquisition device on a video environment.

Description

technical field [0001] The invention relates to the field of image acquisition, in particular to an image acquisition device and a method for judging whether to re-execute autofocus. Background technique [0002] With the development of the network, the video system is widely used in daily life, so that users in different cities and countries can conduct conference discussions through video, thus saving the cost of face-to-face meetings. Generally speaking, when a user uses a computer to execute a network communication program to conduct a video conference, the computer's network camera can collect the image of the end user, and transmit the image of the end user to the computer of the other end user through the network communication program, and then The image is played through the computer screen or the image output device of the other end user, and the other end user also transmits the image to the end user through the same method, so that a multi-party video conference c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/225
Inventor 吕思豪余建男
Owner PRIMAX ELECTRONICS LTD
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