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    • 1. 发明申请
      US20050035973A1 Systems and methods for providing image rendering using variable rate source sampling 有权
    • Systems and methods for providing image rendering using variable rate source sampling
    • US20050035973A1
    • 2005-02-17
    • US10945827
    • 2004-09-21
    • John Snyder , John Whitted , William Blank , Kirk Olynyk
    • John Snyder , John Whitted , William Blank , Kirk Olynyk
    • G06T15/20 , G06T15/50 , G09G5/00
    • G06T15/80 , G06T15/04
    • Systems and methods are provided for variable source rate sampling in connection with image rendering, which accumulate and resolve over all samples forward mapped to each pixel bin. In accordance with the invention, the textured surface to be rendered is sampled, or oversampled, at a variable rate that reflects variations in frequency among different regions, taking into account any transformation that will be applied to the surface prior to rendering and the view parameters of the display device, thus ensuring that each bin of the rendering process receives at least a predetermined minimum number of samples. In one embodiment, the sampling rate is variably set such that each bin is assured to have at least one sample point. In another embodiment, a tiling approach to division of the surface is utilized. In accordance with the architecture provided, the sample points of the surface are forward mapped to sample squares, other regions, of a rendering device, taking into account any transformations applied to the surface and the view parameters of the rendering device, such that each bin receives at least the predetermined minimum number of samples. A filter determines the value(s) to assign to each pixel based upon accumulation and resolution of all of the sample points that fall within the pixel bin(s), rather than assigning a value by selecting only the point sample that corresponds to the center of the pixel. Gaps or holes left by conventional forward-mapping techniques are eliminated by oversampling the source(s), and interpolated points are generated at a higher rate than the original source signal(s) to adequately cover the destination bins. A pixel, or sub-pixel, binning approach is used that accumulates and resolves over all samples, and performs particularly well compared to prior architectures in areas that have higher frequency content, solving the minification antialiasing problem and producing a high quality result. Anisotropic filtering is handled simply with the forward mapping approach by filtering over all samples that naturally accumulate after the forward map, and via variable control of the number of samples forward mapped to the bins. A variety of image processing applications are contemplated wherein variable rate source sampling, and accumulation and resolution of forward mapped point samples can be applied, ranging from 3-D graphics applications to applications wherein images recorded in a recording/storage environment are mapped to the arbitrary requirements of a display environment.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 4. 发明授权
      US07768524B2 Systems and methods for providing image rendering using variable rate source sampling 有权
    • Systems and methods for providing image rendering using variable rate source sampling
    • 使用可变速率源采样提供图像渲染的系统和方法
    • US07768524B2
    • 2010-08-03
    • US10945827
    • 2004-09-21
    • John Michael Snyder , John Turner Whitted , William Thomas Blank , Kirk Olynyk
    • John Michael Snyder , John Turner Whitted , William Thomas Blank , Kirk Olynyk
    • G09G5/02
    • G06T15/80 , G06T15/04
    • Systems and methods are provided for variable source rate sampling in connection with image rendering, which accumulate and resolve over all samples forward mapped to each pixel bin. In accordance with the invention, the textured surface to be rendered is sampled, or oversampled, at a variable rate that reflects variations in frequency among different regions, taking into account any transformation that will be applied to the surface prior to rendering and the view parameters of the display device, thus ensuring that each bin of the rendering process receives at least a predetermined minimum number of samples. In one embodiment, the sampling rate is variably set such that each bin is assured to have at least one sample point. In another embodiment, a tiling approach to division of the surface is utilized. In accordance with the architecture provided, the sample points of the surface are forward mapped to sample squares, other regions, of a rendering device, taking into account any transformations applied to the surface and the view parameters of the rendering device, such that each bin receives at least the predetermined minimum number of samples. A filter determines the value(s) to assign to each pixel based upon accumulation and resolution of all of the sample points that fall within the pixel bin(s), rather than assigning a value by selecting only the point sample that corresponds to the center of the pixel.Gaps or holes left by conventional forward-mapping techniques are eliminated by oversampling the source(s), and interpolated points are generated at a higher rate than the original source signal(s) to adequately cover the destination bins. A pixel, or sub-pixel, binning approach is used that accumulates and resolves over all samples, and performs particularly well compared to prior architectures in areas that have higher frequency content, solving the minification antialiasing problem and producing a high quality result. Anisotropic filtering is handled simply with the forward mapping approach by filtering over all samples that naturally accumulate after the forward map, and via variable control of the number of samples forward mapped to the bins.A variety of image processing applications are contemplated wherein variable rate source sampling, and accumulation and resolution of forward mapped point samples can be applied, ranging from 3-D graphics applications to applications wherein images recorded in a recording/storage environment are mapped to the arbitrary requirements of a display environment.
    • 基于其变化的频率（即，图像不均匀性的密度），必要的渲染变换（例如图像旋转，平移，放大，缩小）和显示设备参数的源图像（例如，纹理表面）的可变速率采样得到改善，并且 简化图像渲染。 在将可变速率采样选择性地应用于每个部分之前，纹理化表面被分成部分（即，源瓦片），从而避免需要额外的校正处理的不必要的过度或欠采样。 纹理表面的样本从源图块前向映射到目标正方形。 每个目的地广场具有一个或多个表示显示设备的像素或子像素的信息组。 样品累积在相应的箱中。 采样控制确保每个存储体接收到预定的最小数量的采样，从而避免了传统的前向映射技术中常见的间隙或空洞。 滤波器基于像素块内的所有样本的累积和分辨率（例如加权平均）来确定像素设置。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
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