公开(公告)号：US20130129190A1

公开(公告)日：2013-05-23

申请号：US12952431

申请日：2010-11-23

申请人： Scott D. Cohen ,  Qingxiong Yang

发明人： Scott D. Cohen ,  Qingxiong Yang

IPC分类号： G06K9/00

CPC分类号： G06K9/00 ,  G06T7/593 ,  G06T2207/10012 ,  G06T2207/30201 ,  H04N2013/0081

摘要： Model-based stereo matching from a stereo pair of images of a given object, such as a human face, may result in a high quality depth map. Integrated modeling may combine coarse stereo matching of an object with details from a known 3D model of a different object to create a smooth, high quality depth map that captures the characteristics of the object. A semi-automated process may align the features of the object and the 3D model. A fusion technique may employ a stereo matching confidence measure to assist in combining the stereo results and the roughly aligned 3D model. A normal map and a light direction may be computed. In one embodiment, the normal values and light direction may be used to iteratively perform the fusion technique. A shape-from-shading technique may be employed to refine the normals implied by the fusion output depth map and to bring out fine details. The normals may be used to re-light the object from different light positions.

摘要翻译： 来自给定对象（例如人脸）的立体图像对的基于模型的立体匹配可能导致高质量的深度图。 集成建模可以将对象的粗略立体匹配与来自不同对象的已知3D模型的细节相结合，以创建捕捉对象特征的平滑，高质量的深度图。 半自动化过程可以对齐对象和3D模型的特征。 融合技术可以采用立体匹配置信度量度来帮助组合立体结果和大致对齐的3D模型。 可以计算法线图和光方向。 在一个实施例中，正常值和光方向可以用于迭代地执行融合技术。 可以使用形状遮蔽技术来改进融合输出深度图所暗示的法线，并显示出细节。 法线可以用于从不同的光照位置重新点亮物体。

公开(公告)号：US08406566B1

公开(公告)日：2013-03-26

申请号：US12789201

申请日：2010-05-27

申请人： Gregg D. Wilensky ,  Scott D. Cohen ,  Alan L. Erickson ,  Jen-Chan Chien

发明人： Gregg D. Wilensky ,  Scott D. Cohen ,  Alan L. Erickson ,  Jen-Chan Chien

IPC分类号： G06K9/20 ,  G06K9/34

CPC分类号： G06T11/60 ,  G06T7/12 ,  G06T7/194 ,  G06T2207/20104

摘要： Methods and apparatus for soft edge masking. A soft edge masking technique may be provided via which, starting from an initial, potentially very rough and approximate border selection mask, the user may selectively apply brush strokes to areas of an image to selectively improve the border region of the mask, thus providing softness details in border regions which contain soft objects such as hair and fur. A stroke may be an additive stroke indicating a particular region in which detail from an original image is to be added to a composite image, or a subtractive stroke indicating a particular region in which detail is to be removed from the composite image. The stroke may also indicate a strength parameter value that may be used to indicate an amount of bias to be used in opacity calculations for the affected pixels.

摘要翻译： 软边缘掩蔽的方法和装置。 可以提供软边缘掩蔽技术，通过该软边缘掩蔽技术，从初始的，潜在地非常粗糙和近似的边界选择掩模开始，用户可以选择性地将画笔笔划应用于图像的区域，以选择性地改进掩模的边界区域，从而提供柔软度 细节在包含柔软的物体如头发和毛皮的边界地区。 笔画可以是指示将来自原始图像的细节添加到合成图像的特定区域的附加笔画，或指示要从复合图像中去除细节的特定区域的减法笔画。 行程还可以指示强度参数值，其可用于指示要在受影响像素的不透明度计算中使用的偏差量。

公开(公告)号：US06337925B1

公开(公告)日：2002-01-08

申请号：US09566632

申请日：2000-05-08

申请人： Scott D. Cohen ,  Gregg Wilensky

发明人： Scott D. Cohen ,  Gregg Wilensky

IPC分类号： G06K948

CPC分类号： G06T7/12 ,  G06T7/194 ,  G06T2207/20104

摘要： A method is used for identifying a border in a digital image that is defined by a plurality of pixels, each pixel being defined by a pixel color and a pixel position indicating a location of the pixel in the digital image. The method includes receiving for each pixel a pixel gradient indicating a direction and magnitude of change in color. A user inputs an area of interest that includes at least a portion of the border to be identified. The method then includes estimating information about an edge zone that models the border portion including estimating a position, direction, and width of the edge zone. The position of the edge zone is estimated by calculating a weighted average value of pixel positions of each pixel in the area of interest. The direction of the edge zone is estimated by calculating a weighted average value of pixel gradient direction of each pixel in the area of interest. The method further includes calculating a measure of confidence in the edge zone information and estimating a width of the edge zone at which the calculated measure of confidence decreases appreciably if the estimated width increases. The border is identified based on the estimated edge zone information. An identified border is used to improve masking an object bound by the identified border from the digital image.

摘要翻译： 一种方法用于识别由多个像素定义的数字图像中的边界，每个像素由像素颜色和指示数字图像中的像素的位置的像素位置定义。 该方法包括为每个像素接收指示颜色变化的方向和大小的像素梯度。 用户输入包括要识别的边界的至少一部分的感兴趣区域。 该方法然后包括估计关于对边界部分建模的边缘区域的信息，包括估计边缘区域的位置，方向和宽度。 通过计算感兴趣区域中每个像素的像素位置的加权平均值来估计边缘区域的位置。 通过计算感兴趣区域中每个像素的像素梯度方向的加权平均值来估计边缘区域的方向。 该方法还包括计算边缘区域信息中的置信度，并且估计边缘区域的宽度，在该区域中，如果估计的宽度增加，所计算的置信度量值明显降低。 根据估计边缘区域信息确定边界。 识别的边界被用于改善对从数字图像所标识的边界所界定的对象的掩蔽。