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    • 10. 发明授权
    • Methods and systems to determine conservative view cell occlusion
    • 确定保守观察细胞闭塞的方法和系统
    • US08743114B2
    • 2014-06-03
    • US12234988
    • 2008-09-22
    • Changkyu KimJatin ChhuganiChristian BieniaDaehyun KimAnthony NgueynSanjeev Kumar
    • Changkyu KimJatin ChhuganiChristian BieniaDaehyun KimAnthony NgueynSanjeev Kumar
    • G06T15/00G06T15/40
    • G06T15/40
    • Methods and systems to determine view cell occlusion, including to project objects of a 3-dimensional graphics environment to a 2-dimensional image plane with respect to the view point, to reduce sizes of corresponding object images, to generate an occluder map from the reduced-size object images, to compare at least a portion of the object images to the occluder map, and to identify an object as occluded with respect to the view cell when pixel depth values of the object image are greater than corresponding pixel depth values of the occluder map. Methods and systems to reduce an object image size include methods and systems to nullify pixel depth values within a radius of an edge pixel, and to determine the radius as a distance from the edge pixel to a second pixel so that a line between the view point and the second pixel is parallel with one or more of a line and a plane that is tangential to a sphere enclosing the view cell and a point on the object that corresponds to the edge pixel.
    • 确定观察细胞闭塞的方法和系统,包括将三维图形环境的对象相对于视点投影到二维图像平面,以减小相应对象图像的大小,从缩小的图像生成闭塞图 将对象图像的尺寸调整为将至少一部分对象图像与遮挡物图进行比较,并且当对象图像的像素深度值大于对象图像的对应像素深度值时,识别相对于视图单元被遮挡的对象 封堵器图。 减少对象图像尺寸的方法和系统包括使边缘像素的半径内的像素深度值无效的方法和系统,并且将半径确定为距离边缘像素到第二像素的距离,使得视点 并且第二像素平行于与包围视图单元的球体相切的线和平面以及与边缘像素对应的物体上的点的一个或多个。