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Certification image inclination correction method and device

A tilt correction and image technology, applied in the field of image processing, can solve problems such as low precision of tilt angle and poor correction effect

Active Publication Date: 2017-01-04
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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Problems solved by technology

However, the inclination angle determined by this inclination correction method has low accuracy, resulting in poor correction effect

Method used

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  • Certification image inclination correction method and device
  • Certification image inclination correction method and device
  • Certification image inclination correction method and device

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Embodiment Construction

[0107] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with some aspects of the invention as recited in the appended claims.

[0108] The embodiment of the present disclosure can be applied to the scene of uploading the verification information after taking a photo of the certificate, and is especially suitable for the scene of taking pictures of the certificate by hand or holding the terminal device to take pictures of the certificate, because in both cases, the image of the certificate may be inclined , that is, when shooti...

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Abstract

The present invention discloses a certification image inclination correction method and device, belonging to the image processing technology field. The method comprises: obtaining a certification image; employing a plurality of detectors to preliminarily determine the direction of the certification image, and regulating the direction of the certification image according to the preliminarily determined direction; determining the regulated character position on the certification image to obtain a character distribution map; determining a final rotation angle according to the character distribution map; and rotating the certification image according to the final rotation angle. In the embodiment, a plurality of detectors are used for performing rough direction detection and perform preliminary correction of the certification image, and precision detection is performed based on the character distribution map to perform fine tuning of the certification image so as to ensure the corrected whole direction through the preliminary correction; and after the preliminary correction, it is needed to detect the angle of inclination in a small range and then perform corresponding fine tuning, and compared to one-time regulation, the two-step correction mode is high in regulation precision and good in correction effect.

Description

technical field [0001] The present disclosure relates to the technical field of image processing, and in particular, to a method and device for correcting the inclination of a document image. Background technique [0002] In people's daily life, it is often necessary to obtain relevant information from documents. With the rapid development of technologies such as computers and image processing, the use of computers to automatically identify and enter relevant information has become more and more popular. [0003] In the related technologies, the document image is usually collected by shooting or scanning, and then the collected document image is processed and analyzed to automatically identify and extract relevant information in the document image. Among them, performing tilt correction on the tilted document image is a common processing step. At present, a common method for performing tilt correction on a tilted document image is: firstly perform binarization on the chara...

Claims

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Application Information

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IPC IPC(8): G06K9/32G06T3/60
CPCG06T3/608G06V30/1478
Inventor 王百超范金松杨松
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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