Quick focusing method, quick focusing apparatus and mobile terminal

A focus position, fast technology, applied in the direction of TV, color TV parts, TV system parts, etc., can solve the problems of high time consumption, search time, many times of moving the lens, long focusing time, etc., to achieve The time to search the peak is good, the search efficiency is high, and the effect of overcoming the inaccurate focus

Active Publication Date: 2016-05-11
BEIJING QIHOO TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The search result of the global search method is the most accurate among the focusing methods in the prior art, but it requires the most search time and the number

Method used

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  • Quick focusing method, quick focusing apparatus and mobile terminal
  • Quick focusing method, quick focusing apparatus and mobile terminal
  • Quick focusing method, quick focusing apparatus and mobile terminal

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Embodiment Construction

[0063] The implementation of the present invention will be described in detail below with reference to the drawings and examples, so as to fully understand and implement the implementation process of how to use technical means to solve technical problems and achieve technical effects in the present invention.

[0064] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0065] Memory may include non-permanent storage in computer-readable media, in the form of random access memory (RAM) and / or nonvolatile memory, such as read-only memory (ROM) or flash memory (flashRAM). Memory is an example of computer readable media.

[0066] Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a pr...

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Abstract

The invention discloses a quick focusing method, a quick focusing apparatus and a mobile terminal. By a curve of a quick focusing reference function, a relatively greater second step size is used as a step size in search at an out-of-focus range between a first focusing point and a third focusing point, the out-of-focus range is moved quickly, and a relatively smaller step size is used as the step size in search at a sharp focusing range between a third focusing point and a fourth focusing point to accurately search for an optimal focusing point, since the number of searches is reduced more as compared with the prior art, searching efficiency is higher; further, two sides of the curve of the quick focusing reference function provided in the invention respectively increase monotonically and decrease monotonically, thus, a problem of inaccurate focusing caused by existence of local peaks in the prior art may be overcome.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a fast focusing method and device, and a mobile terminal. Background technique [0002] With the development of electronic technology, more and more smart devices with camera function are used in people's life. These smart devices with camera function must focus on the object to be photographed to obtain good photo quality, so auto focus Method is very important. [0003] There are some autofocus search methods in the prior art, such as the global search method. The global search method is to record the image obtained by the lens every step and calculate the sharpness of the image. When the lens is moved to all search positions in sequence and the image is obtained After the sharpness is obtained, the search is completed, and then the position of the lens corresponding to the image with the maximum sharpness is taken out, and the lens is moved to this po...

Claims

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Application Information

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IPC IPC(8): H04N5/232
CPCH04N23/67
Inventor 林铁楠
Owner BEIJING QIHOO TECH CO LTD
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