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    • 1. 发明授权
    • License plate information reader device for motor vehicles
    • 汽车牌照信息阅读器
    • US06373962B1
    • 2002-04-16
    • US09296606
    • 1999-04-23
    • Takeo KanadeTaizo UmezakiToshio Hamada
    • Takeo KanadeTaizo UmezakiToshio Hamada
    • G06K900
    • G06K9/3258G06K2209/15
    • In a license plate information reader device (A) for motor vehicles, a CCD camera (1) is provided to produce video image data (11) involving a license plate obtained by photographing a front and rear portion of a motor vehicle. An A/D converter (3) produces a digital multivalue image data (31) by A/D converting the video image data (11). A license plate extracting device (4) is provided to produce a digital multivalue image data (41) corresponding to an area in which the license plate occupies. A literal region extracting device (5) extracts a literal positional region of a letter sequence of the license plate based on the image obtained from the license plate extracting device (4). A literal recognition device (6) is provided to recognize a letter from a literal image (571) of the literal positional region obtained from the literal region extracting device (5). An image emphasis device is provided to emphasize the literal image (571) of the literal positional region by replacing a part of the literal region extracting device (5) with a filter net which serves as a neural network.
    • 在用于机动车辆的车牌信息读取装置(A)中,提供CCD摄像机(1),以产生涉及通过拍摄机动车辆的前部和后部获得的车牌的视频图像数据(11)。 A / D转换器(3)通过对视频图像数据(11)进行A / D转换来产生数字多值图像数据(31)。 提供牌照提取装置(4)以产生对应于车牌所占据的区域的数字多值图像数据(41)。 文字区域提取装置(5)基于从车牌提取装置(4)获得的图像,提取车牌的字母序列的文字位置区域。 提供文字识别装置(6)以识别从文字区域提取装置(5)获得的文字位置区域的文字图像(571)中的字母。 提供一种图像强调装置,通过用作为神经网络的滤波器网来替换文字区域提取装置(5)的一部分来强调文字位置区域的文字图像(571)。
    • 2. 发明授权
    • Fingerprint scanning device for use in identification
    • 指纹扫描装置用于识别
    • US5426708A
    • 1995-06-20
    • US74490
    • 1993-06-11
    • Toshio HamadaTaizo Umezaki
    • Toshio HamadaTaizo Umezaki
    • G06T1/00G06K9/00G06T7/00G07C9/00G06K9/74
    • G06K9/00067G07C9/00087
    • In a fingerprint scanning device for use in identification, a fingerprint image input device is provided to photoelectronically input a specified fingerprint of an entrant. A monochrome image data of the ridge pattern of the entrant fingerprint is stored as fingerprint image data. A feature extraction device has a calculator which treats the ridge pattern image with one-dimensional group-delay spectrum transform in X- and Y-directions. The feature extraction device has the characteristic of isolating and emphasizing peaks of the individual frequency spectra in the form of differential with respect to a phase component frequency in Fourier transform analysis, and determining group-delay spectra in X- and Y-direction respectively as fingerprint feature portions. A distinction device is provided to collate the entrant feature portion with a registrant feature portion which is registered by the fingerprint image input means so as to identify the entrant with the registrant when X-oriented and Y-oriented group-delay spectra are recognized as being the same between the entrant and the registrant by calculating whether Euclidean distances fall short of a predetermined threshold limit upon collating the individual ridge pattern image.
    • 在用于识别的指纹扫描装置中,提供指纹图像输入装置以光电子地输入进入者的指定指纹。 进入指纹的脊图案的单色图像数据被存储为指纹图像数据。 特征提取装置具有计算器,其在X和Y方向上用一维组延迟频谱变换处理脊图图像。 特征提取装置具有在傅里叶变换分析中相对于相位分量频率以差分形式分离和强调各个频谱的峰值的特性,并且分别在X和Y方向上确定组延迟谱作为指纹 特征部分。 提供了一种区分装置,用于将参与者特征部分与由指纹图像输入装置登记的注册者特征部分进行核对,以便当X取向和Y取向组延迟光谱被识别为是时识别具有注册者的参与者 通过计算在整理单个脊图案图像时欧氏距离是否落在预定阈值下限之间,在进入者和注册者之间相同。