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    • 83. 发明申请
    • Bicycle frame
    • 自行车架
    • US20090212526A1
    • 2009-08-27
    • US12071415
    • 2008-02-21
    • Chun-Hung Lin
    • Chun-Hung Lin
    • B62K3/02
    • B62K13/02B62K3/06B62K15/00B62K19/06B62K19/24
    • A bicycle frame includes a front part and a rear part. The front part includes head tube, a seat tube and a down tube connected between the head tube and the seat tube. A first connection portion is connected to the conjunction portion of the seat tube and the down tube. The rear part includes a second connection portion, a connection plate extending from a top end of the second connection portion, and two chain stays and two seat stays extending from the connection plate. The connection plate is fixed to the seat tube by at least one bolt, and the first and second connection portions are connected to each other by at least two bolts. The first connection portion includes a ridge which is engaged with the groove defined in the second connection portion.
    • 自行车车架包括前部和后部。 前部包括头管,座管和连接在头管和座管之间的下管。 第一连接部分连接到座管和下管的连接部分。 后部包括第二连接部分,从第二连接部分的顶端延伸的连接板,以及从连接板延伸的两个链条支柱和两个座椅支架。 连接板通过至少一个螺栓固定到座管,并且第一和第二连接部通过至少两个螺栓彼此连接。 第一连接部分包括与限定在第二连接部分中的槽接合的脊。
    • 87. 发明授权
    • Method for detecting sub-pixel motion for optical navigation device
    • 用于检测光学导航装置的子像素运动的方法
    • US07502515B2
    • 2009-03-10
    • US10843387
    • 2004-05-12
    • Wei-Hsin GuKun-Wei LinChun-Hung Lin
    • Wei-Hsin GuKun-Wei LinChun-Hung Lin
    • G06K9/36
    • G06F3/0317G06K9/6203G06T7/20
    • A method for detecting sub-pixel motion for an optical navigation device is disclosed. The method calculates the displacement of the sub-pixel motion according to brightness curve equations of captured images, which is represented by positional coordinates x and y. The detection method includes capturing a first image frame and a second image frame at different times, selecting plural pixels from the first image frame as calculation reference pixels, generating brightness curve equations of the reference pixels, calculating partial-derivatives of the reference pixel to generate a plurality of two-dimensional first-order equations, and calculating the sub-pixel motion according to the plurality of the two-dimensional first-order equations. The method can reduce the pixel noise by choosing reliable pixels as the reference pixels. The method also reduce the noise by classifying the reference pixels.
    • 公开了一种用于检测光学导航装置的子像素运动的方法。 该方法根据由位置坐标x和y表示的拍摄图像的亮度曲线方程计算子像素运动的位移。 检测方法包括在不同时间拍摄第一图像帧和第二图像帧,从第一图像帧中选择多个像素作为计算参考像素,生成参考像素的亮度曲线方程,计算参考像素的偏导数以产生 多个二维一阶方程,并且根据多个二维一阶方程计算子像素运动。 该方法可以通过选择可靠的像素作为参考像素来减少像素噪声。 该方法还通过对参考像素进行分类来降低噪声。