A dual-mode encoding system for optical character recognition. It is based on the detection of recurrent patterns (forexample, alphanumeric characters) in the document being transmitted. This encoding technique has been compared with both symbol matching and facsimile operational modes. In a special test of 1000 samples with identical sets of symbols, CSMalgorithms rejected all damaged characters and no mismatches were reported for this bandwidth compression technique.; 光學(xué)字符識(shí)別中的一種雙重模式編碼系統(tǒng)。它基于對(duì)傳輸中文件內(nèi)的重現(xiàn)模式(例如字母數(shù)字字符)的檢測(cè)。這一編碼技術(shù)已經(jīng)與符號(hào)匹配和傳真操作兩種模式進(jìn)行過(guò)比較。在一次對(duì)1000個(gè)含同樣字符集的樣本測(cè)試特例中,CSM算法拒識(shí)了所有受損字符,并且沒(méi)有發(fā)現(xiàn)這種帶寬壓縮技術(shù)中有錯(cuò)誤匹配。