文本图像二值化算法的优劣直接影响图像文本字符识别的准确率。秦简文字图像受制于背景光照欠均衡和噪声复杂等因素影响,传统文本图像二值化算法无法准确分割其前景和背景,秦简文字轮廓等特征无法准确提取,二值化效果达不到文本高准确...文本图像二值化算法的优劣直接影响图像文本字符识别的准确率。秦简文字图像受制于背景光照欠均衡和噪声复杂等因素影响,传统文本图像二值化算法无法准确分割其前景和背景,秦简文字轮廓等特征无法准确提取,二值化效果达不到文本高准确识别要求。针对图像质量不平衡的秦简文字图像提出了一种基于图像信噪比自适应阈值模型的二值化算法。首先,将图像进行灰度转换、调整亮度和降噪等一系列二值化前的预先处理;其次,根据图像信噪比(SNR)大小自适应设置阈值,分别采用OTSU算法和Bernsen算法进行二值化处理;最后,由峰值信噪比(PSNR)与结构相似性(SSIM)评价指标择优选取二值化图像,从而准确地提取秦简图像二值化后的文字轮廓。在自建的秦简文字数据集QBS text dataset上的测试结果表明,该算法的二值化结果保留了更多的秦简文字细节特征和文字轮廓,其峰值信噪比和精确率也分别达到25.61 dB和76.67%,相较其他经典文本图像二值化算法,其性能指标均有较大提升。展开更多
The Qin Bamboo slips stored at Yuelu Academy include over 20 names of ‘jun’(counties) in the Qin period.Therefore,these materials tremendously enrich our understandings of the ‘jun’ administration system and compl...The Qin Bamboo slips stored at Yuelu Academy include over 20 names of ‘jun’(counties) in the Qin period.Therefore,these materials tremendously enrich our understandings of the ‘jun’ administration system and complement problems existed in other kinds of documents.This paper tries to propose some supplementary ideas based on previous studies and these ideas related to three kinds of cases.First,the character ‘tai’(泰) in the names of ‘jun’ represented that such countries existed relatively earlier;therefore,Qinghe County(清河郡)and Hengshan County(衡山郡)might have set up before the unification by the Qin Dynasty.Second,‘Zhouling’(州陵)was not the name of a Qin County,and ‘zhoulingshou’(州陵守)most likely meant a deputy minister of ‘zhoulingxian’(州陵县)’.Third,this paper highlights some problems in the idea of viewing Jianghu County(江湖郡)as Huaiyang County(淮阳郡).展开更多
文摘文本图像二值化算法的优劣直接影响图像文本字符识别的准确率。秦简文字图像受制于背景光照欠均衡和噪声复杂等因素影响,传统文本图像二值化算法无法准确分割其前景和背景,秦简文字轮廓等特征无法准确提取,二值化效果达不到文本高准确识别要求。针对图像质量不平衡的秦简文字图像提出了一种基于图像信噪比自适应阈值模型的二值化算法。首先,将图像进行灰度转换、调整亮度和降噪等一系列二值化前的预先处理;其次,根据图像信噪比(SNR)大小自适应设置阈值,分别采用OTSU算法和Bernsen算法进行二值化处理;最后,由峰值信噪比(PSNR)与结构相似性(SSIM)评价指标择优选取二值化图像,从而准确地提取秦简图像二值化后的文字轮廓。在自建的秦简文字数据集QBS text dataset上的测试结果表明,该算法的二值化结果保留了更多的秦简文字细节特征和文字轮廓,其峰值信噪比和精确率也分别达到25.61 dB和76.67%,相较其他经典文本图像二值化算法,其性能指标均有较大提升。
文摘The Qin Bamboo slips stored at Yuelu Academy include over 20 names of ‘jun’(counties) in the Qin period.Therefore,these materials tremendously enrich our understandings of the ‘jun’ administration system and complement problems existed in other kinds of documents.This paper tries to propose some supplementary ideas based on previous studies and these ideas related to three kinds of cases.First,the character ‘tai’(泰) in the names of ‘jun’ represented that such countries existed relatively earlier;therefore,Qinghe County(清河郡)and Hengshan County(衡山郡)might have set up before the unification by the Qin Dynasty.Second,‘Zhouling’(州陵)was not the name of a Qin County,and ‘zhoulingshou’(州陵守)most likely meant a deputy minister of ‘zhoulingxian’(州陵县)’.Third,this paper highlights some problems in the idea of viewing Jianghu County(江湖郡)as Huaiyang County(淮阳郡).
