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    • 5. 发明授权
    • Speckle-based two-dimensional motion tracking
    • 基于斑点的二维运动跟踪
    • US07505033B2
    • 2009-03-17
    • US11272415
    • 2005-11-14
    • Li GuoTian QiuDonghui LiJun LiuTing GongYuan Kong
    • Li GuoTian QiuDonghui LiJun LiuTing GongYuan Kong
    • G06F3/033
    • G06F3/0317
    • A relatively moving surface is illuminated with a laser. Light from the laser is reflected by the surface into an array of photosensitive elements; the reflected light includes a speckle pattern. Sums are calculated for outputs of pixels perpendicular to a first dimension along which motion is to be determined. Motion along the first dimension is then determined based on spatial and temporal gradients of the calculated sums. Sums are also calculated for outputs of pixels perpendicular to a second dimension along which motion is to be determined. Motion along the second dimension is then determined based on spatial and temporal gradients of those sums. The array may be rectangular, or may contain arms separated by a pixel-free region.
    • 用激光照射相对移动的表面。 来自激光的光被表面反射成感光元件阵列; 反射光包括斑点图案。 对于垂直于要确定运动的第一维的像素的输出计算和。 然后根据计算的和的空间和时间梯度来确定沿着第一维度的运动。 还计算与垂直于要确定运动的第二维的像素的输出的和。 然后根据这些和的空间和时间梯度来确定沿着第二维度的运动。 阵列可以是矩形的,或者可以包含由无像素区域分隔的臂。
    • 6. 发明申请
    • Speckle-based two-dimensional motion tracking
    • 基于斑点的二维运动跟踪
    • US20070109267A1
    • 2007-05-17
    • US11272403
    • 2005-11-14
    • Li GuoTian QiuDonghui LiJun LiuYuan Kong
    • Li GuoTian QiuDonghui LiJun LiuYuan Kong
    • G09G5/08
    • G06F3/0317
    • Reflected laser light having a speckle pattern is received in a pixel array. Pixel outputs are combined into series representing pixel intensities along particular dimensions at times t and t+Δt. Centroids for each series can be identified, and vectors determined for movement of centroids from time t to time t+Δt. Crossing points may alternatively be identified for data within each series relative to a reference value for that series, and vectors determined for movement of crossing points from time t to time t+Δt. A probability analysis may be used to extract a magnitude and direction of array displacement from a distribution of movement vectors. A series of data values corresponding to time t+Δt may alternatively be correlated to advanced and delayed versions of a series of data values corresponding to time t. The highest correlation is then used to determine movement.
    • 在像素阵列中接收具有斑点图案的反射激光。 在时间t和t + Deltat,像素输出被组合成串联表示像特征尺寸的像素强度。 可以识别每个系列的质心,并确定矢量从时间t到时间t + Deltat的质心运动。 交替点可以相对于该系列的参考值而被识别为每个系列内的数据,以及确定用于从时间t到时间t + Deltat的交叉点的移动的向量。 可以使用概率分析来从运动矢量的分布中提取阵列位移的大小和方向。 对应于时间t + Deltat的一系列数据值可以替代地与对应于时间t的一系列数据值的高级和延迟版本相关联。 然后使用最高的相关性来确定运动。
    • 10. 发明申请
    • Speckle-based two-dimensional motion tracking
    • 基于斑点的二维运动跟踪
    • US20070109268A1
    • 2007-05-17
    • US11272415
    • 2005-11-14
    • Li GuoTian QiuDonghui LiJun LiuTing GongYuan Kong
    • Li GuoTian QiuDonghui LiJun LiuTing GongYuan Kong
    • G09G5/08
    • G06F3/0317
    • A relatively moving surface is illuminated with a laser. Light from the laser is reflected by the surface into an array of photosensitive elements; the reflected light includes a speckle pattern. Sums are calculated for outputs of pixels perpendicular to a first dimension along which motion is to be determined. Motion along the first dimension is then determined based on spatial and temporal gradients of the calculated sums. Sums are also calculated for outputs of pixels perpendicular to a second dimension along which motion is to be determined. Motion along the second dimension is then determined based on spatial and temporal gradients of those sums. The array may be rectangular, or may contain arms separated by a pixel-free region.
    • 用激光照射相对移动的表面。 来自激光的光被表面反射成感光元件阵列; 反射光包括斑点图案。 对于垂直于要确定运动的第一维的像素的输出计算和。 然后根据计算的和的空间和时间梯度来确定沿着第一维度的运动。 还计算与垂直于要确定运动的第二维的像素的输出的和。 然后根据这些和的空间和时间梯度来确定沿着第二维度的运动。 阵列可以是矩形的,或者可以包含由无像素区域分隔的臂。