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    • 22. 发明公开
    • A method for locating and reading a two-dimensional barcode
    • 一种用于定位和读取的二维条形码的方法
    • EP1160720A3
    • 2003-01-02
    • EP01304851.7
    • 2001-06-01
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • Ma, Yue
    • G06K7/14
    • G06K7/10861G06K7/14G06K7/1417G06K7/1443G06K7/1456G06K19/06037
    • Two-dimensional barcodes surrounded by a quiet zone of white space which may or may not include a border, each barcode having encoded digital information in a bitmap representing preferably randomized encoded data bits, are printed onto a printed medium. To extract the encoded digital information from the printed medium, the printed medium is scanned, then the bitmap is located within the printed medium by moving a window, in stepwise fashion in a predetermined pattern across the printed medium. At each step the portion of the printed medium which is encompassed by the window is tested to determine whether it conforms to one or more characteristics of the bitmap. The skew of the bitmap, if any, is determined, by using a finite-state recognizer in combination with a Hough Transform calculation. In one embodiment, the candidate region is divided into a plurality of horizontal regions, preliminary skew angles are calculated for each region, and the actual skew angle is selected using a voting scheme. Once the skew angle is calculated, the bitmap is deskewed if necessary, cropped, and the randomized digital information is read from the bitmap. Finally, the digital information is derandomized and any error correction codes are removed, in the process correcting and/or recording any errors discovered, thereby reproducing the original encoded digital information.
    • 25. 发明公开
    • Multicolor image-forming material.
    • Mehrfarbiges Bildaufzeichnungmaterial
    • EP1226972A2
    • 2002-07-31
    • EP02250500.2
    • 2002-01-24
    • FUJI PHOTO FILM CO., LTD.
    • Nakamura, HideyukiYamamoto, MitsuruMiyake, KazuhitoYoshinari, ShinichiHatakeyama, Akira
    • B41M5/38B41M5/00
    • B41M5/52B41M5/345B41M5/38207B41M5/392B41M5/46B41M5/529Y10S430/153
    • A multicolor image-forming material comprising: an image-receiving sheet comprising an image-receiving layer; and at least four thermal transfer sheets each comprising a support, a photothermal converting layer and an image-forming layer, and each having a different color, wherein an image is formed by the method comprising the steps of: superposing each one of the at least four thermal transfer sheets on the image-receiving sheet to be in a state of the image-forming layer being in contact with the image-receiving layer; and irradiating the thermal transfer sheet with a laser beam to transfer an image in an area of the image-forming layer subjected to irradiation onto the image-receiving layer, and a ratio of the reflection optical density (OD r ) of the image-forming layer to a thickness of the image-forming layer (µm unit) is 1.50 or more to 1, and a contact angle in relation to water of the image-forming layer and the image-receiving layer is from 7.0 to 120.0°.
    • 一种多色图像形成材料,包括:图像接收片,其包括图像接收层; 以及至少四个热转印片,每个热转印片包括支撑体,光热转换层和图像形成层,并且各自具有不同的颜色,其中通过所述方法形成图像,所述方法包括以下步骤:将至少 图像接收片上的四个热转印片处于图像形成层与图像接收层接触的状态; 以及用激光束照射热转印片,以将经受照射的图像形成层的区域中的图像转印到图像接收层上,并且图像形成层的反射光密度(ODr) 图像形成层(μm)的厚度为1.50以上1以下,图像形成层和图像接收层的与水的接触角为7.0〜120.0度。