Calligraphy inverse hanging prevention method based on SIFT (Scale invariant feature Transform)

A technique of calligraphy and gradient histogram, applied in the field of image matching, which can solve problems such as inversion of Chinese characters

Inactive Publication Date: 2017-12-19
XIAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a SIFT-based calligraphy anti-upside-down method, which solves the pr

Method used

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  • Calligraphy inverse hanging prevention method based on SIFT (Scale invariant feature Transform)
  • Calligraphy inverse hanging prevention method based on SIFT (Scale invariant feature Transform)
  • Calligraphy inverse hanging prevention method based on SIFT (Scale invariant feature Transform)

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Embodiment

[0135] First, four possible rotation angles (90°, 180°, 270°, 360°) are used as sample images, and then the relevant matching radicals are automatically found in the radical library for comparison. The results are as follows Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, it can be seen that the radical matching is successful, as a control experiment, Figure 10 Cases for incorrect matching of radicals. The test results are processed, the matching lines of the characteristic points of normal suspension angles are straight, and the matching lines of other abnormal suspension angles are crossed. Judging by these matching lines, the expected successful effect can be obtained.

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Abstract

The invention discloses a calligraphy inverse hanging prevention method based on SIFT (Scale invariant feature Transform). The method comprises the following steps that: firstly, preprocessing a calligraphy font image to obtain the binary image of a calligraphy font, carrying out convolution operation, and importing a DOG (Difference of Gaussian) scale space operator to generate a DOG scale space; then, detecting the extreme value point of the calligraphy font image; and finally, carrying out operation to obtain a Sift feature descriptor, and matching the Sift feature descriptor with radicals in an existing radical library to obtain a proximate result. By use of the method, the problem in the prior art that foreign friends inversely put Chinese characters since the foreign friends do not understand Chinese characters can be solved.

Description

technical field [0001] The invention belongs to the technical field of image matching methods, and in particular relates to a SIFT-based calligraphy anti-hanging method. Background technique [0002] Chinese calligraphy works are an important part of Chinese traditional culture. They have a unique art form and are self-contained and unique in the world. Therefore, they are also deeply loved by foreign friends. Chinese calligraphy works can be seen in many foreigners' families, but due to the particularity of Chinese characters, most foreign friends do not know the composition of Chinese characters, and calligraphy works can sometimes be seen hanging upside down. The reason is that it is very likely that it was placed upside down when it was mounted because it did not understand Chinese characters. For example: a calligraphy work is hung upside down or rotated 90°, 180°, 270°, or the scroll is hung upside down, etc. It is ridiculous, it is very necessary to provide a method ...

Claims

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Application Information

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IPC IPC(8): G06K9/62G06K9/34G06K9/38
CPCG06V10/267G06V10/28G06V10/751G06F18/23
Inventor 张九龙赵庆屈小娥刘一波马晨喆
Owner XIAN UNIV OF TECH
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