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    • 7. 发明申请
    • MULTIVIEW FACE CAPTURE USING POLARIZED SPHERICAL GRADIENT ILLUMINATION
    • 使用极化球面梯度照明的多视面捕获
    • US20120268571A1
    • 2012-10-25
    • US13449729
    • 2012-04-18
    • PAUL E. DEBEVECABHIJEET GHOSHGRAHAM FYFFE
    • PAUL E. DEBEVECABHIJEET GHOSHGRAHAM FYFFE
    • H04N13/02G06T15/00
    • G06T7/0073G06K9/00255G06K9/2036G06T7/586G06T2207/10016G06T2207/10152G06T2207/30201H04N13/254H04N13/282
    • A multiview face capture system may acquire detailed facial geometry with high resolution diffuse and specular photometric information from multiple viewpoints. A lighting system may illuminate a face with polarized light from multiple directions. The light may be polarized substantially parallel to a reference axis during a parallel polarization mode of operation and substantially perpendicular to the reference axis during a perpendicular polarization mode of operation. Multiple cameras may each capture an image of the face along a materially different optical axis and have a linear polarizer configured to polarize light traveling along its optical axis in a direction that is substantially parallel to the reference axis. A controller may cause each of the cameras to capture an image of the face while the lighting system is in the parallel polarization mode of operation and again while the lighting system is in the perpendicular polarization mode of operation.
    • 多视角人脸捕获系统可以从多个视点获取具有高分辨率漫反射光度信息的详细面部几何。 照明系统可以用来自多个方向的偏振光照亮面部。 在平行极化操作模式期间,光可以基本平行于参考轴线极化,并且在垂直偏振操作模式期间基本垂直于基准轴线。 多个摄像机可以各自沿着物理上不同的光轴捕获面部的图像,并且具有线性偏振器,其被配置为使沿着其光轴沿基本上平行于参考轴线的方向偏振光。 控制器可以使得每个照相机在照明系统处于并行极化操作模式的同时再次照明系统处于垂直极化操作模式时捕获脸部的图像。
    • 8. 发明授权
    • Method and apparatus for scannerless range image capture using
photographic film
    • 使用摄影胶片的无扫描范围图像捕获的方法和装置
    • US6118946A
    • 2000-09-12
    • US342370
    • 1999-06-29
    • Lawrence A. RayTimothy P. Mathers
    • Lawrence A. RayTimothy P. Mathers
    • G03B15/03G06T7/00G03B7/00G03B17/24G06K9/00
    • G06T7/0028G03B15/03G06T7/0073
    • A method for image capture and estimation of range information is provided which uses photographic film as the image capture mechanism. A plurality of identical images are captured on film yielding an image bundle wherein each image in the image bundle is captured with a different phase offset. Fiducial marks are placed on the photographic film between adjacent images in the image bundle. The image bundle is developed and the developed images are scanned. The images of the image bundle are then registered by aligning the fiducial marks. The distance from the image capture device to object(s) in the images of the image bundle can then be estimated using the different phase offsets for each image. The range at a pixel location is estimated by selecting the intensity of the pixel at that location of each image and performing a best fit of a sine wave of one period through the points. The phase of the resulting best fitted sine wave is then used to estimate the range to the object based upon the wave length of the illumination frequency.
    • 提供了一种使用摄影胶片作为图像拍摄机构的图像拍摄和距离信息估计方法。 多个相同的图像被捕获在胶片上,产生图像束,其中图像束中的每个图像被以不同的相位偏移捕获。 将基准标记放置在图像束中相邻图像之间的摄影胶片上。 开发图像束并扫描图像。 然后通过对准基准标记来登记图像束的图像。 然后可以使用每个图像的不同相位偏移估计从图像捕获装置到图像束的图像中的对象的距离。 通过选择每个图像的该位置处的像素的强度并且通过点执行一个周期的正弦波的最佳拟合来估计像素位置处的范围。 然后,所得到的最佳拟合正弦波的相位基于照明频率的波长来估计对象的范围。