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    • 8. 发明申请
    • System and method for image matting
    • 图像消光系统和方法
    • US20060221248A1
    • 2006-10-05
    • US11092376
    • 2005-03-29
    • Morgan McGuireWojciech MatusikHanspeter PfisterJohn HughesFredo Durand
    • Morgan McGuireWojciech MatusikHanspeter PfisterJohn HughesFredo Durand
    • H04N9/74
    • H04N5/272
    • A method and system extracts a matte from images acquired of a scene. A foreground image focused at a foreground in a scene, a background image focused at a background in the scene, and a pinhole image focused on the entire scene are acquired. These three images can be acquired sequentially by a single camera, or simultaneous by three cameras. In the later case, foreground, background and pinhole sequences of images can be acquired. The pinhole image is compared to the foreground image and the background image to extract a matte representing the scene. The comparison classifies pixels in the images as foreground, background, or unknown pixels. An optimizer minimizes an error function in the form of Fourier image equations using a gradient descent method. The error function expresses pixel intensity differences.
    • 方法和系统从场景获取的图像中提取哑光。 获取聚焦在场景中的前景的前景图像,聚焦在场景背景中的背景图像以及聚焦在整个场景上的针孔图像。 这三个图像可以由单个相机顺序获取,或者由三个相机同时获取。 在后一种情况下,可以获取图像的前景,背景和针孔序列。 将针孔图像与前景图像和背景图像进行比较,以提取表示场景的哑光。 比较将图像中的像素分类为前景,背景或未知像素。 优化器使用梯度下降法将傅里叶图像方程式的误差函数最小化。 误差函数表示像素强度差异。