Moiré Technique and Seal Verification

• Main Authors: Ren-De Lin, 林仁德
• Other Authors: Yun-Long Lay
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/18691834808482986612

碩士 === 國立勤益科技大學 === 電子工程系 === 99 === With the rapid development of today's business activities, the applications of seals use sharply, which makes the traditional manual verification mechanism is overloaded. The automatic seal verification technology then arises naturally. The seal of recognition technology is now only done for part of seal identification. However, the maturity of photographic lithography technology development, making the pirates of the engraved seal is no longer difficult. This paper presents an automatic seal verification method, and the shell of the 3D part of the seal is also included in the scope of identification to increase the pirates of the engraved seal of difficulty. In the case of some of the shadow Moire technique used to complete a quick way to build non-contact seal of 3D information, and its simple set up means and without expensive equipment. At the same time use lettering part of the triangular prism of total reflection characteristics to obtain a clear picture ever. Finally, the images obtained by the simple image processing to obtain the characteristic sequence, and then use SVM to do classification of features method for judging the seal of authenticity.