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Automatic focusing method and device

An automatic focusing and focusing position technology, applied in the field of optical focusing, can solve the problems of unable to realize text image focusing scheme, low text content accuracy, low speed, etc., achieve small changes, improve accuracy and speed, and achieve simple effects

Inactive Publication Date: 2015-07-08
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Abstract
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Problems solved by technology

[0009] The purpose of the present invention is to at least solve one of the above-mentioned technical defects, in particular to provide an autofocus method and device for determining the lens focus position of the region by acquiring multiple text images of the text in the region; The focus position of the lens determines the focus position of the text in the image range, so as to solve the problem of low accuracy and low rate of obtaining text content from the image in the prior art that cannot achieve an effective focus scheme for text images

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  • Automatic focusing method and device
  • Automatic focusing method and device

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Embodiment Construction

[0029] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

[0030] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, el...

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Abstract

The embodiment of the invention provides an automatic focusing method, which comprises the following steps: a text in an image range is detected, and a region where the text is located is analyzed and determined; multiple text images of the text in the region are acquired, and a lens focusing position of the region is determined; and according to the lens focusing position of the region, a lens focusing position of the text in the image range is determined. The embodiment of the invention also provides an automatic focusing device, which comprises a detection module, a focusing module and a positioning module. According to the method and the device provided by the invention, the text image can be effectively focused, and accuracy and the rate of extracting the text content in the image can be improved. In addition, based on the text focusing mode, the speed and convenience of shooting the text can be improved, the automatic focusing problem of single-text shooting and multi-text shooting can be solved, man-machine interaction times can be effectively reduced, and use convenience of the user is improved.

Description

Technical field [0001] The present invention relates to the technical field of optical focusing, in particular, the present invention relates to a method and device for automatic focusing of text images. Background technique [0002] Most image-based image content acquisition methods require the use of automatic focusing technology. The auto-focus technology used to obtain image content refers to automatically adjusting the position of the focusing lens group in the lens according to the distance of the object being photographed, so that the object is clearly imaged on the imaging plane, thereby further obtaining the image content on the imaging plane. Autofocus technology has now been widely used in image acquisition devices such as cameras and camcorders. Compared with traditional focus technology, autofocus technology has the advantages of simplicity, speed, and convenience. [0003] At present, the auto-focus technology used to obtain the image content can be divided into a gl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232
Inventor 陈雪峰郭山
Owner BEIJING SAMSUNG TELECOM R&D CENT
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