计算机应用与软件2018，Vol.35Issue(3)：162-166,5.DOI:10.3969/j.issn.1000-386x.2018.03.031
基于极坐标变换的脱机手写藏文字符特征提取方法
FEATURE EXTRACTION METHOD OF OFF-LINE HANDWRITTEN TIBETAN CHARACTER BASED ON POLAR COORDINATES TRANSFORMATION
摘要
Abstract
A feature extraction method of off-line handwritten Tibetan characters based on projection transformation of polar coordinates is proposed to make less dimensions of Tibetan characters feature vector, less storage space, faster computation speed and higher ability of distinguishing similar words.The offline handwritten Tibetan character image is pre-processed to obtain binary image with same size and position, and its vertex is located.We obtain the polar coordinates corresponding to the points valued 1 in the binary image and the projected vector after projection transformation,which is feature vector for offline handwritten Tibetan characters.30 000 offline handwritten Tibetan characters are tested by using KNN classifier,80%of the samples are used as training data and 20%of the samples are used as test data.The recognition rate is 96.32% which indicates that the method is effective, simple and achieves better recognition results.关键词
脱机手写藏文字符/极坐标/特征提取/投影向量/KNNKey words
Off-line handwritten Tibetan character/Polar coordinates/Feature extraction/Projection vector/KNN分类
信息技术与安全科学引用本文复制引用
朱利娟,云中华,边巴旺堆..基于极坐标变换的脱机手写藏文字符特征提取方法[J].计算机应用与软件,2018,35(3):162-166,5.基金项目
西藏自治区自然科学基金项目(2016ZR-15-8) （2016ZR-15-8）
西藏大学青年科研培育基金项目(ZDPJZK1508) （ZDPJZK1508）
西藏自治区高校青年教师创新支持计划项目(QCZ2016-26). （QCZ2016-26）
