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    • 21. 发明申请
    • Computer Graphics Methods and Systems for Generating Images with Rounded Corners
    • 用于生成具有圆角的图像的计算机图形方法和系统
    • US20080129733A1
    • 2008-06-05
    • US11843535
    • 2007-08-22
    • Hakan Andersson
    • Hakan Andersson
    • G06T15/50
    • G06T15/80
    • Methods, systems, apparatus, and computer program/software code products, operable in a computer graphics system designed to render images and to apply shading to images, enable the following: during rendering of an image, modifying the shading normal in the region of a corner of an object in the image, such thai when shading is applied to the image, the shaded image is capable of providing to a human viewer, when viewing the corner in the image, the appearance or visual illusion of a rounded corner, wherein the modifying comprises: calculating an amount of modification to be applied to an original shading normal in the region of the corner to simulate the appearance of a given fillet radius R, the calculating comprising: interrogating surfaces within a distance R of the corner for their shading normal, and calculating a new normal that is a weighted blend between the shading normal of the original surface and the shading normal of the interrogated neighboring surface, thereby, by the shading effect, to simulate at render-time a rounding by varying the shading normal, creating a variation of the surface normal consistent with the appearance the object would have had, had it actually been rounded.
    • 方法,系统,装置和计算机程序/软件代码产品可在计算机图形系统中工作,该计算机图形系统旨在渲染图像并将图像应用于图像,使得能够实现以下目的:在渲染图像期间,修改图像区域中的阴影法线 图像中的物体的角部,例如当将阴影应用于图像时,阴影图像能够在观看图像中的角部,圆角的外观或视觉幻觉时向人类观看者提供,其中, 修改包括:计算要应用于角落区域中的原始阴影法线的修改量以模拟给定圆角半径R的外观,所述计算包括:询问角落的距离R内的阴影正常的表面 ,并且计算作为原始表面的阴影法线与询问的相邻表面的阴影法线之间的加权混合的新法线,由此,通过 阴影效果,通过改变阴影正常,在渲染时进行舍入,以模拟渲染时间,如果实际上已经被舍入,则会产生与对象所出现的一致的表面法线的变化。