CAJ | 학술논문

目的以汉字图像各空间频率的频谱能量相似为原则,筛选汉字作为汉字视力表的备选视标.方法从2500个常用汉字中选取两类笔画数的汉字:少笔画数汉字(2、3、4画,共172个)和中笔画数汉字(7、8.9画,共890个).将其中的每个汉字制作成BMP图片格式.然后,利用傅里叶频谱分析,获取每个汉字图像各空间频率成分的频谱分布.以此分别对所有的少笔画数和中笔画数汉字的各空间频率的频谱能量求均值,将其作为参照值,采用聚类分析将汉字图像进行聚类来选取汉字.结果与少笔画数和中笔画数汉字各空间频率的频谱能量均值相似的汉字分别为50和40个.结论通过汉字图像的傅里叶频谱分析,以汉字图像的各空间频率的频谱能量相似作为筛选视标的主要原则,符合了视觉系统具有的傅里叶频谱分析特性.此方法应用于汉字视标的筛选具有重要的意义.
목적 이한자도상각공간빈솔적빈보능량상사위원칙,사선한자작위한자시력표적비선시표.방법 종2500개상용한자중선취량류필화수적한자:소필화수한자(2、3、4화,공172개)화중필화수한자(7、8.9화,공890개).장기중적매개한자제작성BMP도편격식.연후,이용부리협빈보분석,획취매개한자도상각공간빈솔성분적빈보분포.이차분별대소유적소필화수화중필화수한자적각공간빈솔적빈보능량구균치,장기작위삼조치,채용취류분석장한자도상진행취류래선취한자.결과 여소필화수화중필화수한자각공간빈솔적빈보능량균치상사적한자분별위50화40개.결론 통과한자도상적부리협빈보분석,이한자도상적각공간빈솔적빈보능량상사작위사선시표적주요원칙,부합료시각계통구유적부리협빈보분석특성.차방법응용우한자시표적사선구유중요적의의.
Objective To select Chinese characters for Chinese visual acuity chart by using the method of Fourier frequency spectrum analysis. Methods BMP images were made for 1062 Chinese characters with small or medium number of strokes. The images were processed to derive frequency spectrum at the frequency domain by using a MatLab program. Euclidean distance from Cluster analysis was then used to classify and select the Chinese characters for optotypes of the visual acuity chart, based on their mean frequency spectrum from all the characters analyzed. Results Fifty and forty Chinese characters were selected from the groups of the small and the middle number of strokes respectively. Conclusions It is important and interesting to select Chinese characters by using Fourier analysis method for designing Chinese visual acuity chart that is consisting with the property of the visual system of the eye.