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    • 6. 发明授权
    • Detection method of two-dimensional code, detection device for the same, and storage medium storing detection program for the same
    • 二维码检测方法,检测装置相同,存储介质存储检测程序相同
    • US08061615B2
    • 2011-11-22
    • US11523570
    • 2006-09-20
    • Shinichi Yada
    • Shinichi Yada
    • G09K5/04
    • G06K7/14G06K7/1456
    • A method for detecting a two-dimensional code in which three position detection patterns are provided in positions corresponding to respective apices of a right angled isosceles triangle, and a data region is provided in a region defined by the position detection patterns is provided. The method includes detecting plural position detection patterns included in an image; identifying center points of the detected position detection patterns; selecting, from among the center points that positions are identified, three center points that constitute apices of a right angled isosceles triangle; extracting a feature as a two-dimensional code from a two-dimensional code region defined by the position detection patterns corresponding to the selected center points, or the peripheral region thereof; and in case where the feature as a two-dimensional code is extracted, determining that a two-dimensional code exists in the two-dimensional code region.
    • 一种用于检测二维码的方法,其中三个位置检测图案设置在与直角等腰三角形的各个顶点对应的位置中,并且在由位置检测图案限定的区域中提供数据区域。 该方法包括检测包括在图像中的多个位置检测图案; 识别检测到的位置检测图案的中心点; 从确定位置的中心点中选择构成直角等腰三角形顶点的三个中心点; 从由所选择的中心点或其外围区域对应的位置检测图案限定的二维码区域提取特征作为二维码; 并且在提取作为二维码的特征的情况下,确定在二维码区域中存在二维码。
    • 7. 发明授权
    • Image processing system and image processing method
    • 图像处理系统和图像处理方法
    • US06320981B1
    • 2001-11-20
    • US09135574
    • 1998-08-18
    • Shinichi Yada
    • Shinichi Yada
    • G06K900
    • G06T9/005H04N19/91
    • Block representative values are set adaptively based on the feature amount concerning the distribution state of a prepared histogram of input image data. Thus, if block truncation coding is executed based on an input image having mixed CG image and scanned image areas, efficient coding can be performed and a high-quality decomposed image can be provided. Further, when the histogram is divided into image data groups, the image data groups can be again divided to provide a high-quality decomposed image, thus efficient coding can be performed and a high-quality decomposed image can be provided more reliably.
    • 基于关于输入图像数据的准备直方图的分布状态的特征量,块自适应地设定块代表值。 因此,如果基于具有混合CG图像和扫描图像区域的输入图像执行块截断编码,则可以执行高效编码,并且可以提供高质量分解图像。 此外,当直方图被分割为图像数据组时,可以再次分割图像数据组以提供高质量的分解图像,从而可以更可靠地提供高质量的分解图像。
    • 8. 发明授权
    • Image processing apparatus and method
    • 图像处理装置及方法
    • US06285458B1
    • 2001-09-04
    • US08903381
    • 1997-07-30
    • Shinichi Yada
    • Shinichi Yada
    • B41B100
    • H04N1/41H04N19/115H04N19/12H04N19/124H04N19/126H04N19/149H04N19/15H04N19/152H04N19/17H04N19/176H04N19/186H04N19/192H04N19/60H04N19/70H04N19/93H04N19/98
    • An image process apparatus, for use with image data combining areas of different image characteristics such as text and photos, which achieves a predetermined target compression rate and simultaneously minimizes quality deterioration after decompression, is described. The image analysis circuit analyzes the composition of the entire image data and calculates the optimum compression parameter. The compression process is performed using a selected compression method for each predetermined block. At the time of compression, the value of the parameter is used in order to select an appropriate compression method by switching compression methods among a plurality of compression methods for each block unit. Using optimum compression minimizes the amount of memory required to store the information.
    • 描述了一种与图像数据组合使用的图像处理装置,该图像数据组合了实现预定目标压缩率并同时最小化解压缩后的质量恶化的诸如文本和照片的不同图像特征的区域。 图像分析电路分析整个图像数据的组成并计算最佳压缩参数。 对于每个预定块,使用选择的压缩方法来执行压缩处理。 在压缩时,使用参数值,以便通过在每个块单元的多个压缩方法之间切换压缩方法来选择适当的压缩方法。 使用最佳的压缩可以最大限度地减少存储信息所需的内存量。
    • 9. 发明申请
    • CODE READING DEVICE, CODE READING PROGRAM STORAGE MEDIUM AND CODE READING METHOD
    • 代码阅读设备,代码阅读程序存储介质和代码读取方法
    • US20090078766A1
    • 2009-03-26
    • US12128651
    • 2008-05-29
    • Takeshi FuruyamaShinichi Yada
    • Takeshi FuruyamaShinichi Yada
    • G06K7/10G06K9/03
    • G06K7/10722G06K7/1417G06K7/1443
    • A code reading device includes an acquisition section, a derivation section and a correction section. The acquisition section reads a two-dimensional code image and acquires image information representing the two-dimensional code image. The derivation section derives an image characteristic quantity representing a ratio between a number of white pixels and a number of black pixels for a pre-specified region of the image information acquired by the acquisition section. The correction section, on the basis of a result of comparison of the image characteristic quantity derived by the derivation section with a reference value corresponding to the pre-specified region, applies correction to the image information to bring the image characteristic quantity closer to the reference value.
    • 代码读取装置包括获取部分,导出部分和校正部分。 获取部分读取二维码图像并获取表示二维码图像的图像信息。 推导部分导出表示由获取部分获取的图像信息的预定区域的白色像素数与黑色像素数之间的比率的图像特征量。 校正部根据由导出部导出的图像特征量与对应于预先指定的区域的基准值进行比较的结果的结果,对图像信息进行校正,使图像特征量更接近参考 值。