Research On Quality Evaluation Algorithm Of Handwritten Chinese Character Copy

Copying is the most effective way to learn Chinese characters,especially Chinese calligraphy.This paper develops a calligraphy-assisted learning system.First,linear normalization,binarization,and nonlinear filtering are used to preprocess the image of the copybook template image and the copied Chinese calligraphy works;then,in the comparison mode,the copy The Chinese characters are evaluated for similarity,and the copying differences are given to effectively help calligraphy practitioners improve the quality of Chinese character writing.The thesis mainly completed the following work:(1)Preprocessing of handwritten Chinese character image.In this paper,image pre-processing such as image size normalization,gray-scale image processing,image threshold segmentation,and image denoising processing is performed.Among them,the image size normalization process uses the bicubic interpolation algorithm,which retains the edge characteristics of the image well;the grayscale processing uses the weighted average method,and the weighted coefficient in the grayscale processing of the weighted average is more in line with the human eye's sensitivity to green High and low sensitivity to blue;this paper uses the method of global threshold to binarize the image of copying calligraphy works and template Chinese characters.The results show that the global threshold can clearly separate Chinese characters from the background image;The filtering method adopts bilateral filtering,and the results show that while filtering out the irrelevant information of the Chinese character image,the Chinese edge detail information can be retained.(2)In view of the problems that handwritten Chinese characters are prone to distortion in handwriting,different size of characters,and incorrect center position of text,this paper proposes a comparative evaluation mode of handwritten Chinese characters and copybook template Chinese characters.The paper's copy quality evaluation is divided into similarity evaluation and difference guidance evaluation: similarity evaluation is a method of weighted calculation and comparison of skeleton features and edge features,which achieves the scoring and feature matching of the similarity between the copied Chinese characters and the template;difference guidance The evaluation is a "sliding window" to obtain the difference guidance evaluation,which realizes the marking and printing of different parts of the copied Chinese characters and the template Chinese characters.(3)This article uses object-oriented thinking to develop offline Chinese character calligraphy learning software,which has the function of automatically evaluating the copying level of the practitioner and giving the difference position.