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    • 6. 发明授权
    • Using photographic images to construct a three-dimensional model with a curved surface
    • 使用摄影图像构建具有曲面的三维模型
    • US08817018B1
    • 2014-08-26
    • US13159219
    • 2011-06-13
    • Zhe FanBrian Gammon BrownTilman ReinhardtMatthew Robert Simpson
    • Zhe FanBrian Gammon BrownTilman ReinhardtMatthew Robert Simpson
    • G06T15/00
    • G06T17/05G06T7/55G06T2207/10016G06T2207/10032G06T2207/20101G06T2207/30184
    • Embodiments relate to constructing a three-dimensional model using a plurality of two-dimensional photographic images. In a first embodiment, a first user input specifying a first position on a first photographic image may be received. A second user input specifying a second position on a second photographic image may be received, the second photographic image having a second perspective, specified by a second set of camera parameters, being different from a first perspective of the first image specified by a first set of camera parameters. The user inputs may indicate corresponding features in the images. Using photogrammetry, a point in a three-dimensional space may be determined according to the first position, the second position, the first set of camera parameters, and the second set of camera parameters. A surface of the three-dimensional model may be determined, whereby the surface may be curved to the point in three-dimensional space determined earlier.
    • 实施例涉及使用多个二维摄影图像来构建三维模型。 在第一实施例中,可以接收指定第一摄影图像上的第一位置的第一用户输入。 可以接收指定第二摄影图像上的第二位置的第二用户输入,具有由第二组相机参数指定的第二透视图的第二摄影图像不同于由第一组指定的第一图像的第一透视图 的相机参数。 用户输入可以指示图像中的相应特征。 使用摄影测量法,可以根据第一位置,第二位置,第一组相机参数和第二组相机参数来确定三维空间中的点。 可以确定三维模型的表面,由此表面可以弯曲到先前确定的三维空间中的点。
    • 10. 发明授权
    • Clock recovery
    • 时钟恢复
    • US07580492B2
    • 2009-08-25
    • US11151560
    • 2005-06-13
    • Andrew PickeringSimon ForeyRobert SimpsonShaun Lytollis
    • Andrew PickeringSimon ForeyRobert SimpsonShaun Lytollis
    • H04L7/00
    • H04L25/069H04L7/0025H04L7/0338
    • Clock recovery apparatus having an early/late voter for deciding whether a current sampling point needs to be advanced or retarded, wherein the early/late voter passes and Up/Down signal to an interpolator for maintaining a clock signal; a frequency accumulator and rate multiplier 30 for generating further signals which are summed with those of the Up/Down signal of the early/late voter to provide an improved control signal to the phase interpolator. The accumulator is responsive to frequency changes in the input signal, and the interpolator acts on said Up/Down signals to adjust the clock signal by stepping it forward or backward according to control need, so that the sampling point can be advanced or retarded.
    • 具有早/晚选民的时钟恢复装置,用于决定当前采样点是否需要提前或延迟,其中早/晚选民通过上行/下行信号到内插器,用于维持时钟信号; 频率累积器和速率倍增器30,用于产生与早/晚选民的Up / Down信号相加的信号,以向相位插值器提供改进的控制信号。 累加器响应于输入信号中的频率变化,并且内插器作用于所述上/下信号,以根据控制需要向前或向后逐步调整时钟信号,使得采样点可以提前或延迟。