發明
中華民國
104134064
I 543588
利用像素黑白互換調變的半色調資料隱寫編碼系統及解碼系統
國立臺北科技大學
2016/07/21
本專利發展一個在直接半色調影像中加密的方法.先應用半色調網幕(screening)演算法中的集中式抖色法(Clustered-dot ordered screening),產生包含聚集墨點形狀的半色調影像。在編碼的時候,藉由隨機在每個半色調單元(halftone cell)中做像素值翻轉(toggle)的動作,來隱寫入不同資訊。比如,隨機將某半色調單元中的一個像素位置做像素值翻轉代表code 1,如果該半色調單元沒有做任何像素值翻轉代表code 1,因此單單這個半色調單元可以隱寫的資料量(data capacity)為1 bit。 A barcode is an optical machine-readable representation of data that is commonly used in the automation industry. Barcode systems have wide applications involving automatic identification and data capture (AIDC. Although barcodes are frequently used for encoding information for printed matter, they add unsightly overt content. We proposes a novel barcode system, in which a data message is hidden in the printed image, thus requiring no barcode area. In addition, hiding data in images other than barcode areas, e.g. commercial logos, can greatly increase the added values of using barcode systems. In this patent application, we first applied the regular screening process to divide the input continuous-tone image into discrete parameter halftone cells. The hidden data message was encoded by the proposed encoding toggles in the halftone cells. To ensure the optimal image quality, a modified direct binary search (DBS) optimization framework was integrated in the proposed system.
本部(收文號1080026226)同意該校108年4月26日北科大產學字第1087900115號函申請終止維護專利
專利技轉組
02-87720360
版權所有 © 國家科學及技術委員會 National Science and Technology Council All Rights Reserved.
建議使用IE 11或以上版本瀏覽器,最佳瀏覽解析度為1024x768以上|政府網站資料開放宣告
主辦單位:國家科學及技術委員會 執行單位:台灣經濟研究院 網站維護:台灣經濟研究院