公开(公告)号：US07430335B2

公开(公告)日：2008-09-30

申请号：US10640944

申请日：2003-08-13

Applicant: Adriana Dumitras ,  James Oliver Normile ,  Ryan R. Salsbury

Inventor： Adriana Dumitras ,  James Oliver Normile ,  Ryan R. Salsbury

IPC: G06K9/40 ,  H04N7/12

CPC classification number: H04N19/117 ,  G06K9/00234 ,  H04N5/21 ,  H04N9/8042 ,  H04N19/136 ,  H04N19/14 ,  H04N19/17 ,  H04N19/186 ,  H04N19/192 ,  H04N19/80

Abstract: Methods for pre-processing video sequences prior to compression to provide data reduction of the video sequence. Also, after compression of the pre-processed video sequence, the bit rate of the pre-processed and compressed video sequence will be lower than the bit rate of the video sequence after compression but without pre-processing. Pre-processing may include spatial anisotropic diffusion filtering such as Perona-Malik filtering, Fallah-Ford filtering, or omni-directional filtering that extends Perona-Malik filtering to perform filtering in at least one diagonal direction. Pre-processing may also include performing filtering differently on a foreground region than on a background region of a video frame. This method includes identifying pixel locations having pixel values matching characteristics of human skin and determining a bounding shape for each contiguous grouping of matching pixel locations. The foreground region is comprised of pixel locations contained in a bounding shape and the background region is comprised of all other pixel locations.

Abstract translation: 用于在压缩之前预处理视频序列以提供视频序列的数据缩减的方法。 此外，在经过预处理的视频序列的压缩之后，预处理和压缩的视频序列的比特率将低于压缩后的视频序列的比特率，但是没有预处理。 预处理可以包括空间各向异性扩散滤波，例如Perona-Malik滤波，Fallah-Ford滤波或全向滤波，其延伸Perona-Malik滤波以在至少一个对角线方向上执行滤波。 预处理还可以包括在前景区域上比在视频帧的背景区域上执行不同的滤波。 该方法包括识别具有与人皮肤特征相匹配的像素值的像素位置，并确定匹配像素位置的每个连续分组的边界形状。 前景区域由包含在边界形状中的像素位置组成，并且背景区域由所有其它像素位置组成。

公开(公告)号：US20050286629A1

公开(公告)日：2005-12-29

申请号：US10875265

申请日：2004-06-25

Applicant: Adriana Dumitras ,  Barin Haskell

Inventor： Adriana Dumitras ,  Barin Haskell

IPC: H04B1/66 ,  H04N5/14 ,  H04N7/12 ,  H04N7/26 ,  H04N7/46 ,  H04N7/50 ,  H04N9/64 ,  H04N11/02 ,  H04N11/04

CPC classification number: H04N19/114 ,  H04N19/124 ,  H04N19/137 ,  H04N19/142 ,  H04N19/577 ,  H04N19/61

Abstract: A coding scheme for groups of frames that include scene cuts causes frames before and after the scene cut to be coded as non-reference frames with increased quantization parameters to reduce bandwidth. Although greater coding distortion can be expected for such frames, the distortion should be less or even not perceptible to a viewer owing to the dynamically changing image content caused by the scene change. Quantization parameter increases may vary based on: a viewing rate expected at a decoder, proximity of a frame to the scene cut, and observable motion speed both before and after the scene cut. Additionally, non-reference frames in the GOF may be coded using spatial direct mode coding.

Abstract translation: 包括场景切换的帧组的编码方案使得在场景剪切之前和之后的帧被编码为具有增加的量化参数的非参考帧以减少带宽。 尽管对于这样的帧可以预期更大的编码失真，但是由于由场景变化引起的动态变化的图像内容，因此观看者的失真应该更少或甚至不能察觉。 量化参数增加可以基于：解码器预期的观看速率，帧到场景切换的接近度以及在场景切割之前和之后的可观察的运动速度可以变化。 另外，可以使用空间直接模式编码对GOF中的非参考帧进行编码。

公开(公告)号：US20050036558A1

公开(公告)日：2005-02-17

申请号：US10640734

申请日：2003-08-13

Applicant: Adriana Dumitras ,  James Normile ,  Ryan Salsbury

Inventor： Adriana Dumitras ,  James Normile ,  Ryan Salsbury

IPC: H04N5/21 ,  H04N7/26 ,  H04N9/804 ,  H04N7/12

CPC classification number: H04N19/117 ,  H04N5/21 ,  H04N9/8042 ,  H04N19/136 ,  H04N19/17 ,  H04N19/80

Abstract: Methods for pre-processing video sequences prior to compression to provide data reduction of the video sequence. In addition, after compression of the pre-processed video sequence, the bit rate of the pre-processed and compressed video sequence will be lower than the bit rate of the video sequence after compression but without pre-processing. A temporal filtering method is provided for pre-processing of video frames of a video sequence. In the method, pixel values of successive frames are filtered when the difference in the pixel values between the successive frames are within high and low threshold values. The high and low threshold values are determined adaptively depending on the illumination level of a video frame to provide variability of filtering strength depending on the illumination levels of a video frame.

Abstract translation: 用于在压缩之前预处理视频序列以提供视频序列的数据缩减的方法。 此外，在压缩预处理的视频序列之后，预处理和压缩的视频序列的比特率将低于压缩后的视频序列的比特率，但是没有预处理。 提供了用于对视频序列的视频帧进行预处理的时间滤波方法。 在该方法中，当连续帧之间的像素值的差在高和低阈值之间时，连续帧的像素值被滤波。 根据视频帧的照明级别自适应地确定高和低阈值，以根据视频帧的照明级别提供滤波强度的变化性。

公开(公告)号：US08806339B2

公开(公告)日：2014-08-12

申请号：US13367363

申请日：2012-02-06

Applicant: Hans H. Kim ,  Andrew Bryant ,  Adriana Dumitras

Inventor： Hans H. Kim ,  Andrew Bryant ,  Adriana Dumitras

IPC: G06F3/14

CPC classification number: G11B27/034 ,  G11B27/34 ,  H04N5/262

Abstract: Some embodiments provide a method that provides a graphical user interface (GUI) on a first device for controlling application of color corrections to a media item by a media editing application on a second device. The method provides a display area that includes several different locations. Each location in the display area corresponds to a set of values. The method provides several user interface (UI) items that are each for (1) moving in the display area and (2) specifying a set of values for a color correction operation that the media editing application applies to the media item. The set of values for the color correction operation specified by each UI item is the set of values is associated with the location at which the UI item is positioned in the display area.

Abstract translation: 一些实施例提供了一种在第一设备上提供图形用户界面（GUI）的方法，用于通过第二设备上的媒体编辑应用来控制对媒体项的颜色校正的应用。 该方法提供包括几个不同位置的显示区域。 显示区域中的每个位置对应于一组值。 该方法提供了多个用户界面（UI）项目，每个用户界面（UI）项目用于（1）在显示区域中移动;以及（2）为媒体编辑应用程序应用于媒体项目的颜色校正操作指定一组值。 每个UI项目指定的颜色校正操作的值集合是一组值与UI项目在显示区域中的位置相关联。

公开(公告)号：US08542918B2

公开(公告)日：2013-09-24

申请号：US12892918

申请日：2010-09-28

Applicant: Andrew Bryant ,  Adriana Dumitras

Inventor： Andrew Bryant ,  Adriana Dumitras

IPC: G06K9/00

CPC classification number: H04N9/77 ,  G06T5/009

Abstract: Some embodiments of the invention provide a non-linear image-enhancement method to enhance an image that includes a number of picture elements. The non-linear enhancement method adjusts the brightness value of each pixel in the image and adjusts at least one chromatic value of each pixel in the image based on the adjustment to the brightness value of that pixel.

Abstract translation: 本发明的一些实施例提供了一种用于增强包括多个图像元素的图像的非线性图像增强方法。 非线性增强方法基于对该像素的亮度值的调整来调整图像中的每个像素的亮度值并且调整图像中的每个像素的至少一个色值。

公开(公告)号：US20050243099A1

公开(公告)日：2005-11-03

申请号：US11179701

申请日：2005-07-12

Applicant: Adriana Dumitras ,  Barin Haskell

Inventor： Adriana Dumitras ,  Barin Haskell

IPC: G06T5/00 ,  G06T7/40 ,  G06T11/00 ,  H04N5/262 ,  H04N7/26 ,  G09G5/00

CPC classification number: G06T11/001 ,  G06T7/40 ,  G06T7/41 ,  G06T9/00 ,  G06T9/001 ,  H04N19/14 ,  H04N19/167 ,  H04N19/17 ,  H04N19/186 ,  H04N19/23 ,  H04N19/27

Abstract: Systems and methods for reducing bit rates by replacing original texture in a video sequence with synthesized texture. Reducing the bit rate of the video sequence begins by identifying and removing selected texture from frames in a video sequence. The removed texture is analyzed to generate texture parameters. New texture is synthesized using the texture parameters in combination with a set of constraints. Then, the newly synthesized texture is mapped back into the frames of the video sequence from which the original texture was removed. The resulting frames are then encoded. The bit rate of the video sequence with the synthesized texture is less than the bit rate of the video sequence with the original texture. Also, the ability of a decoder to decode the new video sequence is not compromised because no assumptions are made about the texture synthesis capabilities of the decoder.

Abstract translation: 通过用合成纹理替换视频序列中的原始纹理来降低比特率的系统和方法。 通过从视频序列中的帧识别和去除所选纹理，降低视频序列的比特率。 分析去除的纹理以生成纹理参数。 使用纹理参数和一组约束组合新的纹理。 然后，将新合成的纹理映射回去除原始纹理的视频序列的帧。 然后对所得到的帧进行编码。 具有合成纹理的视频序列的比特率小于具有原始纹理的视频序列的比特率。 此外，解码器解码新视频序列的能力不会受到损害，因为没有对解码器的纹理合成能力做出假设。

公开(公告)号：US20050036704A1

公开(公告)日：2005-02-17

申请号：US10640944

申请日：2003-08-13

Applicant: Adriana Dumitras ,  James Normile ,  Ryan Salsbury

Inventor： Adriana Dumitras ,  James Normile ,  Ryan Salsbury

IPC: G06K9/00 ,  H04N5/21 ,  H04N7/26 ,  H04N9/804 ,  G06K9/40

CPC classification number: H04N19/117 ,  G06K9/00234 ,  H04N5/21 ,  H04N9/8042 ,  H04N19/136 ,  H04N19/14 ,  H04N19/17 ,  H04N19/186 ,  H04N19/192 ,  H04N19/80

Abstract: Methods for pre-processing video sequences prior to compression to provide data reduction of the video sequence. Also, after compression of the pre-processed video sequence, the bit rate of the pre-processed and compressed video sequence will be lower than the bit rate of the video sequence after compression but without pre-processing. Pre-processing may include spatial anisotropic diffusion filtering such as Perona-Malik filtering, Fallah-Ford filtering, or omni-directional filtering that extends Perona-Malik filtering to perform filtering in at least one diagonal direction. Pre-processing may also include performing filtering differently on a foreground region than on a background region of a video frame. This method includes identifying pixel locations having pixel values matching characteristics of human skin and determining a bounding shape for each contiguous grouping of matching pixel locations. The foreground region is comprised of pixel locations contained in a bounding shape and the background region is comprised of all other pixel locations.

Abstract translation: 用于在压缩之前预处理视频序列以提供视频序列的数据缩减的方法。 此外，在经过预处理的视频序列的压缩之后，预处理和压缩的视频序列的比特率将低于压缩后的视频序列的比特率，但是没有预处理。 预处理可以包括空间各向异性扩散滤波，例如Perona-Malik滤波，Fallah-Ford滤波或全向滤波，其延伸Perona-Malik滤波以在至少一个对角线方向上执行滤波。 预处理还可以包括在前景区域上比在视频帧的背景区域上执行不同的滤波。 该方法包括识别具有与人皮肤特征相匹配的像素值的像素位置，并确定匹配像素位置的每个连续分组的边界形状。 前景区域由包含在边界形状中的像素位置组成，并且背景区域由所有其它像素位置组成。