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    • 1. 发明申请
    • REDUCING ARTIFACTS IN COMPRESSED IMAGES
    • 减少压缩图像中的人物
    • WO2005039187A1
    • 2005-04-28
    • PCT/US2004/032483
    • 2004-09-29
    • HEWLETT-PACKARD DEVELOPMENT COMPANY L.P.SAMADANI, RaminSUNDARARJAN, ArvindSAID, Amir
    • SAMADANI, RaminSUNDARARJAN, ArvindSAID, Amir
    • H04N7/26
    • H04N19/86H04N19/122H04N19/60
    • Systems and methods of reducing artifices in compressed images (12) are described. In one aspect, spatially-shifted forward transforms of the input image (12) are computed to generate respective sets of forward transform coefficients (C 1 , C 2 , …, C K ). Nonlinear transforms (T 1 , T 2 , …, T K ) are applied to the forward transform coefficients of each set (C 1 , C 2 , …, C K ). Inverse transforms (C’ 1 , C’ 2 , …, C’ K )of the sets of nonlinearly transformed forward transform coefficients are computed to generate respective intermediate images (I 1 , I 2 , …, I K ). Respective measures of local spatial intensity variability are computed for pixels of each of the intermediate images (I 1 , I 2 , …, I K ). An output image (40) is computed with pixel values computed based at least in part of the competed measures of the local spatial intensity variability.
    • 描述了在压缩图像(12)中减少工件的系统和方法。 在一个方面,计算输入图像(12)的空间位移正向变换,以产生各组正向变换系数(C1,C2,...,CK)。 非线性变换(T1,T2,...,TK)被应用于每个集合(C1,C2,...,CK)的正向变换系数。 计算非线性变换前向变换系数集合的逆变换(C'1,C'2,...,C'K)以生成各自的中间图像(I1,I2,...,IK)。 对于每个中间图像(I1,I2,...,IK)的像素,计算局部空间强度变异性的各个度量。 使用根据局部空间强度变异性的竞争测量的至少一部分计算的像素值计算输出图像(40)。
    • 2. 发明申请
    • SYSTEMS AND METHODS FOR EYE TRACKING USING RETROREFLECTOR-ENCODED INFORMATION
    • 使用RETROREFOROR-ENCODED信息进行眼睛跟踪的系统和方法
    • WO2012008966A1
    • 2012-01-19
    • PCT/US2010/042237
    • 2010-07-16
    • HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.SAID, Amir
    • SAID, Amir
    • G02B27/22G02B5/126
    • G06K9/3241G02B27/0093
    • Embodiments of the present invention are directed to eye tracking systems and methods that can be used in uncontrolled environments and under a variety of lighting conditions. In one aspect, an eye tracking system (200) includes a light source (204) configured to emit infrared ("IR") light, and an optical sensor (206) disposed adjacent to the light source and configured to detect IR light. The system also includes one or more retroreflectors (210) disposed on headgear. The one or more retroreflectors are configured to reflect the IR light back toward the light source. The reflected IR light is captured as IR images by the optical sensor. The IR images provide information regarding the location and head orientation of a person wearing the headgear.
    • 本发明的实施例涉及可以在不受控制的环境中和在各种照明条件下使用的眼睛跟踪系统和方法。 一方面,眼睛跟踪系统(200)包括被配置为发射红外(“IR”)光的光源(204)和邻近于光源设置并被配置为检测IR光的光学传感器(206)。 该系统还包括设置在头饰上的一个或多个后向反射器(210)。 一个或多个后向反射器被配置为将IR光反射回光源。 反射的IR光被光学传感器捕获为IR图像。 IR图像提供有关头戴戴着身穿的人的位置和头部方向的信息。