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Image moment and projection method-based text image attitude correction algorithm

A text image and correction algorithm technology, applied in the field of image processing, can solve problems such as distortion correction, and achieve the effect of fast running speed, high precision and simple algorithm

Inactive Publication Date: 2020-01-17
青岛康特网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the deficiencies in the prior art and provides a posture correction algorithm for text images based on image moments and projection methods to solve the problem of text image rotation distortion correction for multi-line text

Method used

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  • Image moment and projection method-based text image attitude correction algorithm
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  • Image moment and projection method-based text image attitude correction algorithm

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Embodiment Construction

[0032] In order to make the technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, and Not all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] An embodiment of the present invention provides a posture correction algorithm of a text image based on an image moment and projection method, comprising the following steps:

[0034] S1. Use the big law to select an appropriate threshold k, and convert the input image I into a binary image. The size of the input image is H×W, and the conversion formula is:

[0035]

[0036] Among them, m...

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Abstract

The invention belongs to the field of image processing, and provides an image moment and projection method-based text image attitude correction algorithm, which comprises the following steps: S1, selecting a proper threshold k, and converting an input image I into a binary image of which the size is H * W; S2, calculating the main axis direction theta of the image through the central moment of theimage; S3, rotating the image according to the calculated main axis direction to obtain a rotated corrected image; wherein the calculation formula is as follows: I '= root (I, theta), wherein I' represents the corrected image, and rotate represents the rotation function. The method is simple in algorithm and high in operation speed, real-time correction can be achieved, the obtained rotation angle is high in precision, and the method can be widely applied to the field of posture correction of text images.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a posture correction algorithm of a text image based on an image moment and projection method. Background technique [0002] Pictures are important information carriers, and text information in images is an important content for understanding the entire image. In recent years, with the development of information automation, more and more attention has been paid to text images. When shooting objects with digital devices such as digital cameras, computer cameras, and mobile phones, due to reasons such as shooting distance, shooting angle, or camera, the captured images often have various deformations. Such deformations may affect previous The final image processing effect, so that the expected processing effect cannot be achieved. In order to recognize the captured image, it is necessary to correct the preprocessing. [0003] Image correction is the process ...

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Application Information

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IPC IPC(8): G06K9/32
CPCG06V10/243
Inventor 慕乾勇韩永昌
Owner 青岛康特网络科技有限公司