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    • 147. 发明授权
    • Techniques to detect Gaussian noise
    • 检测高斯噪声的技术
    • US07672529B2
    • 2010-03-02
    • US11126569
    • 2005-05-10
    • Yi-Jen Chiu
    • Yi-Jen Chiu
    • G06K9/40
    • G06K9/40
    • A system, apparatus, method and article to filter media signals are described. The apparatus may include a media processor. The media processor may include an image signal processor having multiple processing elements to determine a level of noise for an image using an internal spatial region of said image, select filter parameters based on the level of noise, and filter the image using the filter parameters. Other embodiments are described and claimed.
    • 描述了过滤媒体信号的系统,装置,方法和制品。 该装置可以包括媒体处理器。 媒体处理器可以包括具有多个处理元件的图像信号处理器,以使用所述图像的内部空间区域确定图像的噪声水平,基于噪声水平选择滤波器参数,以及使用滤波器参数对图像进行滤波。 描述和要求保护其他实施例。
    • 149. 发明授权
    • Perceptual preprocessing techniques to reduce complexity of video coders
    • 感知预处理技术,以降低视频编码器的复杂性
    • US06366705B1
    • 2002-04-02
    • US09239117
    • 1999-01-28
    • Yi-Jen ChiuPaul Albin WilfordLesley Jen-Yuan WuKyeong-Ho Yang
    • Yi-Jen ChiuPaul Albin WilfordLesley Jen-Yuan WuKyeong-Ho Yang
    • G06K936
    • H04N19/85H04N19/124H04N19/132H04N19/14H04N19/154H04N19/172H04N19/176H04N19/60H04N19/61
    • A method of encoding a video sequence including a sequence of video images includes comparing elements of a portion of a first video image with elements of a portion of a second video image to generate respective intensity difference values for the element comparisons. Then, a first value is assigned to the intensity difference values that are at least above a visually perceptible threshold value and a second value is assigned to the intensity difference values that are not at least above the visually perceptible threshold value. Next, the method includes dividing the portion of the first video image into sub-portions and summing the first and second values associated with each corresponding sub-portion to generate respective sums. If a respective sum is at least greater than a decision value, a variable associated with that sub-portion is set to a first value. If a respective sum is not at least greater than the decision value, the variable associated with that sub-portion is set to a second value. The values associated with the variables are then added. Depending on the result of the addition, the portion of the first video image is either motion compensated or not.
    • 对包括视频图像序列的视频序列进行编码的方法包括将第一视频图像的一部分的元素与第二视频图像的一部分的元素进行比较,以生成用于元素比较的各个强度差值。 然后,将第一值分配给至少高于视觉上可感知阈值的强度差值,并且将第二值分配给至少高于视觉上可感知阈值的强度差值。 接下来,该方法包括将第一视频图像的一部分划分成子部分,并将与每个对应的子部分相关联的第一和第二值相加以产生相应的和。 如果相应的和至少大于判定值,则将与该子部分相关联的变量设置为第一值。 如果相应的和不至少大于判定值,则与该子部分相关联的变量被设置为第二值。 然后添加与变量相关联的值。 根据加法的结果,第一视频图像的部分是运动补偿的。
    • 150. 发明授权
    • Perceptual-based spatio-temporal segmentation for motion estimation
    • 用于运动估计的基于感知的时空分割
    • US06360017B1
    • 2002-03-19
    • US09239135
    • 1999-01-28
    • Yi-Jen ChiuJohn HartungArnaud Eric JacquinRobert James Safranek
    • Yi-Jen ChiuJohn HartungArnaud Eric JacquinRobert James Safranek
    • G06K936
    • H04N19/137H04N19/107H04N19/176H04N19/51H04N19/61
    • A method of encoding a video sequence including a sequence of video images includes first comparing elements of a portion of a first video image (e.g., pixels of a macroblock of a current frame) with elements of a portion of a second video image (e.g., corresponding pixels of a macroblock of a previous frame) to generate respective intensity difference values for the element comparisons. Then, a first value (e.g., one) is assigned to the intensity difference values that are above a visually perceptible threshold value and a second value (e.g., zero) is assigned to the intensity difference values that are at or below the visually perceptible threshold value. Next, the method includes summing the first and second values to generate a sum. If the sum is greater than a predetermined decision value, the portion of the first video image is encoded (e.g., motion compensated). The method is fully compatible and, thus, may be implemented with video standards such as, for example, H.261, H.263, Motion-JPEG, MPEG-1, and MPEG-2.
    • 对包括视频图像序列的视频序列进行编码的方法包括将第一视频图像的一部分(例如,当前帧的宏块的像素)与第二视频图像的一部分的元素(例如, 前一帧的宏块的相应像素)以产生用于元素比较的各个强度差值。 然后,将第一值(例如,一个)分配给高于视觉上可察觉的阈值的强度差值,并且将第二值(例如,零)分配给视觉上可见阈值或以下的强度差值 值。 接下来,该方法包括对第一和第二值求和以产生和。 如果和大于预定的判定值,则对第一视频图像的部分进行编码(例如,运动补偿)。 该方法是完全兼容的,并且因此可以利用诸如H.261,H.263,Motion-JPEG,MPEG-1和MPEG-2之类的视频标准来实现。