A Chinese Character Image Retrieval Method Based on Shape Matching
A technology of image retrieval and Chinese characters, which is applied in the direction of still image data retrieval and special data processing applications, etc. It can solve the problems of slow update, difficult to deal with, easy to ambiguity, etc.
Inactive Publication Date: 2019-01-22
BEIHANG UNIV
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However, due to the limitations of the controlled vocabulary itself, ambiguity, and slow update, it is not easy to deal with the ever-changing images on the Internet, and the efficiency is relatively low, and the versatility is not good, so it often cannot meet people's needs.
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[0008] Such as figure 1 As shown, the Chinese character image retrieval method based on shape matching of the present invention adopts the following steps:
[0009] (1) Preprocess all Chinese character images in the database. Since the present invention mainly aims at the retrieval of calligraphy characters pasted on steles left by ancient calligraphers, the obtained calligraphy characters must be segmented and other processing first. Firstly, the obtained overall image of the tablet is divided into single characters. Considering that the ancient calligraphy is written from top to bottom, the obtained calligraphy image is projected vertically, that is, the pixels of all Chinese characters on the tablet are projected onto the horizontal axis. According to the coordinates projected on the horizontal axis, the entire inscription is divided into several columns. Due to the above-mentioned writing characteristics, the Chinese characters in each column are basically aligned, and there ...
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The invention discloses a Chinese character image retrieval method based on shape matching. The method establishes a shape feature describing function based on a shape context algorithm, and a Hu invariant moment algorithm is introduced in description of a Chinese character image, so that a Chinese character image feature description function has higher robustness. The method performs retrieval on images of legacy of calligraphy works in inscription on the stone tablets of ancient calligraphers through digitalized extraction, so that users can easily appreciate and compare styles of works of different calligraphers in different periods. Through the provided shape describing function, similarity measurement is performed, so as to rapidly and accurately retrieve a matched image in a training set, and meanwhile, the position of the matched Chinese character image in an original tablet inscription can be checked. The Chinese character shape describing function extracted aimed at tablet inscription is advantaged by high accuracy, high efficiency, and good robustness.
Description
Technical field [0001] The invention belongs to the field of computer vision and computer graphics, and specifically is a method for image retrieval of Chinese characters characterized by two-dimensional shape contour information combining invariant moments and shape context algorithms. The method can be used for calligraphic characters in inscriptions Retrieval, similar word search, etc. Background technique [0002] Calligraphy works and inscriptions are relatively complete and artistic expressions of Chinese characters. In today's society, multimedia technology is constantly developing, and the Internet has basically achieved full popularity. Image information has become a very important information resource and is widely used by people. The information of Chinese character works is also stored in the form of images. With more and more Chinese character works being discovered, the classification of Chinese characters and the verification of authors have become very complicate...
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IPC IPC(8): G06F16/50
CPCG06F16/583
Inventor 梁晓辉詹华年刘敏袁春强李阳王郁菲
Owner BEIHANG UNIV