字母印模 的英文怎麼說
中文拼音 [zìmǔyìnmó]
字母印模
英文
letter stamps- 字 : Ⅰ名詞1 （文字） character; word 2 （字音） pronunciation 3 （字體） form of a written or printed ...
- 母 : Ⅰ名詞1 （母親） mother 2 （泛指女性長輩） one s elderly female relatives 3 （配套的兩件東西里的凹...
- 印 : Ⅰ名詞1 （圖章） seal; stamp; chop 2 （痕跡） print; mark 3 （姓氏） a surname Ⅱ動詞1 （留下痕跡）...
- 模 : 模名詞1. （模子） mould; pattern; matrix 2. （姓氏） a surname
-
For the anticounterfeiting of printings ( such as certificate ), the existent many ways ( such as rainbow holograms ) are not available as the need for special use : anti - distortion and anti - copy. basing in the double - random - phase transform, this article puts forward a new way that two - dimensional bar code is used as anticounterfeiting label with anti - printing ? scanning and anti - damage properties. the major job are : ( 1 ). basing in the ascii codes, numerals and alphabets are encoded and subsequently transformed into two - value bar code matrix figure. later, using amplitude - based double - random - phase transform, the enciphered gray scale figure is formed. by computer simulation ( 4f system ) and printing as well as scanning ( 20 times ), we get the result that the gray scale figure with little miscoding rate ( 0. 0026 ) by “ matrix expanding way ”
本文主要開展了以下三項研究工作: （ 1 ） .用自定義編碼方案，將數字和字母（ ascii碼）轉換成二值條碼圖;對該圖形進行振幅型雙隨機相位加密變換，得到原信息的加密灰度圖;通過4f光學系統計算機模擬和列印-掃描實驗，證明本文提出的「矩陣擴展法」灰度圖具有較小的誤碼率，對於20次列印-掃描實驗，誤碼率不大於0 . 0026 。
分享友人