现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
22期
5-9
,共5页
银行票据%多色印章%颜色判定%遮挡字符
銀行票據%多色印章%顏色判定%遮擋字符
은행표거%다색인장%안색판정%차당자부
bank note%color seal%color judgement%covered character
由于彩色印章的存在，传统的印章滤除算法常常会弱化票据中印章的遮挡字符，降低票据识别正确率，这很难满足实际应用的需要。针对这种情况，提出一种基于彩色图像二次分割的算法，该算法能够实现印章的有效滤除。算法首先对票据背景和印章部分进行滤波。然后，基于印章颜色分析进行图像的第二次分割，判断并提取出印章遮挡的字符。根据票据背景平均灰度值自适应的增强遮挡字符，并滤除干扰印章部分，实现遮挡字符细节得以保留，从而提高了票据识别的正确率。实验结果表明，相比于现有的方法，该文采用的方法将识别准确率提高了约10%，实验证明了该方法的有效性，并具有较好的应用前景和商业价值。
由于綵色印章的存在，傳統的印章濾除算法常常會弱化票據中印章的遮擋字符，降低票據識彆正確率，這很難滿足實際應用的需要。針對這種情況，提齣一種基于綵色圖像二次分割的算法，該算法能夠實現印章的有效濾除。算法首先對票據揹景和印章部分進行濾波。然後，基于印章顏色分析進行圖像的第二次分割，判斷併提取齣印章遮擋的字符。根據票據揹景平均灰度值自適應的增彊遮擋字符，併濾除榦擾印章部分，實現遮擋字符細節得以保留，從而提高瞭票據識彆的正確率。實驗結果錶明，相比于現有的方法，該文採用的方法將識彆準確率提高瞭約10%，實驗證明瞭該方法的有效性，併具有較好的應用前景和商業價值。
유우채색인장적존재，전통적인장려제산법상상회약화표거중인장적차당자부，강저표거식별정학솔，저흔난만족실제응용적수요。침대저충정황，제출일충기우채색도상이차분할적산법，해산법능구실현인장적유효려제。산법수선대표거배경화인장부분진행려파。연후，기우인장안색분석진행도상적제이차분할，판단병제취출인장차당적자부。근거표거배경평균회도치자괄응적증강차당자부，병려제간우인장부분，실현차당자부세절득이보류，종이제고료표거식별적정학솔。실험결과표명，상비우현유적방법，해문채용적방법장식별준학솔제고료약10%，실험증명료해방법적유효성，병구유교호적응용전경화상업개치。
As a result of the existence of color seal,traditional seal filtering algorithms usually weak the characters covered in the Bank Notes,and reduce the recognition accuracy of the notes. Previous methods are hard to meet practical needs. Ac-cording to this,an algorithm based on color image second-segmentation algorithm is presented. The algorithm can realize effi-cient filtering of the color seal. It separates the background of notes and color seal first,and then conducts image second-segmen-tation based on the color analysis of the seal to judge the result and extract the covered characters. According to the mean gray value of bank note background,the covered character is enhanced adaptively and the area disturbed by the seal is filtered,so the recognition rate of the bank notes is improved. The experimental results show that the recognition accuracy is increased by about 10% by the method in comparison with the existing methods.
