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    • 5. 发明授权
    • System for modifying lighting in photographs
    • 修改照片照明系统
    • US5894309A
    • 1999-04-13
    • US805209
    • 1997-02-27
    • William T. FreemanJoseph MarksPaul Beardsley
    • William T. FreemanJoseph MarksPaul Beardsley
    • G06T15/50G06F15/00
    • G06T15/50
    • A system for creating lighting for a photograph generates a large number ofmages based upon structures determined from the photograph and randomly selected light positions, types and directions. One or more photographs are analyzed to determine the three-dimensional structures in the photographs. These structures are represented as gray surfaces, to which lighting is applied. The images are culled to provide a set of images which best spans the lighting space represented by the large number of images. The culling process is iterative; at each iteration, the image which is most dissimilar from a nearest neighbor in the selected set is added to the selected set. The images are organized in a hierarchical structure. A user interface allows the user to review and select images in the hierarchical structure. The images selected by the user are combined to create a final image with composite lighting. The lighting specifications can be saved for future reference by the lighting system or other applications. The lighting of the gray surface images are used to modify the intensity of pixels in the photograph in order to change lighting in the photograph.
    • 用于创建照片照明的系统基于从照片和随机选择的光位置,类型和方向确定的结构生成大量图像。 分析一张或多张照片以确定照片中的三维结构。 这些结构表示为施加照明的灰色表面。 图像被剔除以提供最佳跨越由大量图像表示的照明空间的一组图像。 剔除过程是迭代的; 在每次迭代中,与所选集中的最近邻居最不相似的图像被添加到所选择的集合中。 图像以分层结构组织。 用户界面允许用户在层次结构中查看和选择图像。 组合用户选择的图像以创建具有复合照明的最终图像。 照明规格可以保存,以供将来参考照明系统或其他应用。 灰色表面图像的照明用于修改照片中像素的强度,以便改变照片中的照明。