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公开(公告)号:US07428339B2
公开(公告)日:2008-09-23
申请号:US10703847
申请日:2003-11-07
申请人: Xingguo Wang , Guobin Chen , Lingxiang Zhou
发明人: Xingguo Wang , Guobin Chen , Lingxiang Zhou
IPC分类号: G06K9/36
CPC分类号: H04N19/577 , H04N19/132 , H04N19/15 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/46 , H04N19/61
摘要: A method for real-time video encoding includes buffering frames in an encoder input buffer, retrieving the frames from the encoder input buffer, encoding the retrieved frames into a bit stream, monitoring the encoder input buffer for buffer overflow, and, if the encoder input buffer is about to overflow, encoding one of the retrieved frames as a pseudo-frame that completely references one reference frame of the one retrieved frame. Encoding one of the retrieved frames as a pseudo-frame bypasses a majority of the encoding procedures to improve the overall encoding speed. The method further includes monitoring a hypothetical decoder input buffer that models an actual decoder input buffer in a video decoder, encoding one of the retrieved frames with a pseudo-frame if the hypothetical decoder input buffer is about to underflow, and adding stuffing bits to the bit stream if the hypothetical decoder input buffer is about to overflow.
摘要翻译: 一种用于实时视频编码的方法包括在编码器输入缓冲器中缓冲帧,从编码器输入缓冲器检索帧,将检索到的帧编码为比特流,监视编码器输入缓冲器以进行缓冲器溢出,以及如果编码器输入 缓冲区即将溢出,将检索到的帧之一编码为完全引用一个检索帧的一个参考帧的伪帧。 将所检索的帧之一编码为伪帧绕过大多数编码过程以提高整体编码速度。 该方法还包括监视假设的解码器输入缓冲器,其对视频解码器中的实际解码器输入缓冲器进行建模,如果假设的解码器输入缓冲器即将下溢,则将所检索的帧之一用伪帧编码,并将填充位添加到 如果假设的解码器输入缓冲区即将溢出,则该位流。
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公开(公告)号:US20050100231A1
公开(公告)日:2005-05-12
申请号:US10703847
申请日:2003-11-07
申请人: Xingguo Wang , Guobin Chen , Lingxiang Zhou
发明人: Xingguo Wang , Guobin Chen , Lingxiang Zhou
CPC分类号: H04N19/577 , H04N19/132 , H04N19/15 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/46 , H04N19/61
摘要: A method for real-time video encoding includes buffering frames in an encoder input buffer, retrieving the frames from the encoder input buffer, encoding the retrieved frames into a bit stream, monitoring the encoder input buffer for buffer overflow, and, if the encoder input buffer is about to overflow, encoding one of the retrieved frames as a pseudo-frame that completely references one reference frame of the one retrieved frame. Encoding one of the retrieved frames as a pseudo-frame bypasses a majority of the encoding procedures to improve the overall encoding speed. The method further includes monitoring a hypothetical decoder input buffer that models an actual decoder input buffer in a video decoder, encoding one of the retrieved frames with a pseudo-frame if the hypothetical decoder input buffer is about to underflow, and adding stuffing bits to the bit stream if the hypothetical decoder input buffer is about to overflow.
摘要翻译: 一种用于实时视频编码的方法包括在编码器输入缓冲器中缓冲帧,从编码器输入缓冲器检索帧,将检索到的帧编码为比特流,监视编码器输入缓冲器以进行缓冲器溢出,以及如果编码器输入 缓冲区即将溢出,将检索到的帧之一编码为完全引用一个检索帧的一个参考帧的伪帧。 将所检索的帧之一编码为伪帧绕过大多数编码过程以提高整体编码速度。 该方法还包括监视假设的解码器输入缓冲器,其对视频解码器中的实际解码器输入缓冲器进行建模,如果假设的解码器输入缓冲器即将下溢,则将所检索的帧之一用伪帧编码,并将填充位添加到 如果假设的解码器输入缓冲区即将溢出,则该位流。
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公开(公告)号:US20050063597A1
公开(公告)日:2005-03-24
申请号:US10666692
申请日:2003-09-18
申请人: Kaixuan Mao , Yushan Huang , Donghui Wu , Anding Zhu , Lingxiang Zhou
发明人: Kaixuan Mao , Yushan Huang , Donghui Wu , Anding Zhu , Lingxiang Zhou
CPC分类号: H04N19/60 , H04N19/169 , H04N19/70
摘要: A method for indexing minimum coded units (MCUs) in a Joint Photographic Expert Group (JPEG) bit stream includes (1) entropy decoding a first MCU to determine a bit offset of a second MCU and a DC coefficient of the first MCU, wherein the first MCU immediately precedes the second MCU in the bit stream, and (2) indexing the second MCU by storing the bit offset and the DC coefficient in an index. The method may further include (3) receiving a request for the second MCU, (4) reading the index to determine the bit offset of the second MCU and the DC coefficient of the first MCU, and (5) entropy decoding the second MCU starting at its bit offset in the bit stream, wherein the entropy decoding the second MCU includes determining a DC coefficient of the second MCU using the DC coefficient of the first MCU.
摘要翻译: 在联合图像专家组(JPEG)比特流中对索引最小编码单元(MCU)进行索引的方法包括:(1)熵解码第一MCU以确定第二MCU的位偏移和第一MCU的DC系数,其中 第一个MCU紧接在比特流中的第二个MCU之前,和(2)通过将索引中的位偏移和DC系数存储来对第二个MCU进行索引。 该方法还可以包括(3)接收对第二MCU的请求,(4)读取索引以确定第二MCU的位偏移和第一MCU的DC系数,以及(5)第二个MCU的熵解码开始 在位流中的位偏移处,其中对第二MCU进行熵解码包括使用第一MCU的DC系数来确定第二MCU的DC系数。
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公开(公告)号:US07570808B2
公开(公告)日:2009-08-04
申请号:US10641972
申请日:2003-08-15
申请人: Donghui Wu , Lingxiang Zhou
发明人: Donghui Wu , Lingxiang Zhou
IPC分类号: G06K9/00 , G06K9/40 , G03F3/08 , H04N1/40 , H04N9/64 , H04N5/202 , G09G1/14 , G09G3/28 , G09G3/30 , G09G5/00 , G09G5/02
CPC分类号: H04N5/3572
摘要: A method for enhancing an image includes applying an auto-level transformation to an original image to form a first image, applying an auto-contrast transformation to the original image to form a second image, and applying an auto-brightness transformation to the original image to form a third image. The method further includes applying a color cast correction to the first, the second, and the third images to generate a first group of images, applying a gamma correction to the first group of images to generate a second group of images, applying a sharpening correction to the second group of images to generate a third group of images, and presenting the third group of images to a user to select a final result.
摘要翻译: 一种用于增强图像的方法包括对原始图像应用自动电平变换以形成第一图像,对原始图像应用自动对比度变换以形成第二图像,以及对原始图像应用自动亮度变换 以形成第三图像。 该方法还包括对第一,第二和第三图像应用色偏校正以产生第一组图像,对第一组图像应用伽马校正以产生第二组图像,应用锐化校正 到第二组图像以生成第三组图像,以及将第三组图像呈现给用户以选择最终结果。
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公开(公告)号:US20050162565A1
公开(公告)日:2005-07-28
申请号:US10748371
申请日:2003-12-29
申请人: Lu Zhen , Yushan Huang , Donghui Wu , Lingxiang Zhou
发明人: Lu Zhen , Yushan Huang , Donghui Wu , Lingxiang Zhou
摘要: A method includes (1) generating a first image pyramid of a first image, (2) generating a second image pyramid of a second image, (3) warping a first level image of the first image pyramid with a motion field, (4) determining a residual motion field from the warped first level image of the first image pyramid and a corresponding first level image of the second image pyramid, and (5) if the residual motion field is not less than a threshold, adding the residual motion field to the motion field and repeating steps (3) and (4).
摘要翻译: 一种方法包括:(1)产生第一图像的第一图像金字塔;(2)生成第二图像的第二图像金字塔;(3)用运动场对第一图像金字塔的第一级图像进行翘曲;(4) 从所述第一图像金字塔的翘曲的第一级图像和所述第二图像金字塔的对应的第一级图像确定残余运动场,以及(5)如果所述残留运动场不小于阈值,则将所述残留运动场加到 运动场和重复步骤(3)和(4)。
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公开(公告)号:US20050146539A1
公开(公告)日:2005-07-07
申请号:US10748419
申请日:2003-12-29
申请人: Yunfang Zhu , Huiqiong Wang , Yiqing Jin , Donghui Wu , Lingxiang Zhou
发明人: Yunfang Zhu , Huiqiong Wang , Yiqing Jin , Donghui Wu , Lingxiang Zhou
CPC分类号: G06T11/001 , G06T5/005
摘要: A method for generating texture includes (1) selecting a target patch to be filled in a image, (2) selecting a sample patch as a candidate for filling the target patch, (3) determining a first difference between a first area surrounding the target patch and a corresponding first area surrounding the sample patch, and a second difference between a second area surrounding the target patch and a corresponding second area surrounding the sample patch, (4) multiplying a larger of the first difference and the second difference with a first weight factor, and a smaller of the first difference and the second difference with a second weight factor, and (5) summing the weighted first difference and the weighted second difference as a distance between the target patch and the sample patch.
摘要翻译: 一种用于生成纹理的方法包括:(1)选择要填充的图像中的目标贴片;(2)选择样本贴片作为填充目标贴片的候选者,(3)确定围绕该目标的第一区域之间的第一差异 贴片和围绕所述样本贴片的对应的第一区域,以及围绕所述目标贴片的第二区域与围绕所述样本贴片的对应的第二区域之间的第二差异,(4)将所述第一差异和所述第二差值中的较大者与第一 以及(5)将加权的第一差值和加权的第二差值相加,作为目标贴片和样本贴片之间的距离。
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公开(公告)号:US20080205782A1
公开(公告)日:2008-08-28
申请号:US12113866
申请日:2008-05-01
申请人: Kaixuan Mao , Yushan Huang , Donghui Wu , Anding Zhu , Lingxiang Zhou
发明人: Kaixuan Mao , Yushan Huang , Donghui Wu , Anding Zhu , Lingxiang Zhou
IPC分类号: G06K9/52
CPC分类号: H04N19/60 , H04N19/169 , H04N19/70
摘要: A method is provided for processing minimum coded units (MCUs) in a Joint Photographic Expert Group (JPEG) bit stream representing an image. A data structure is generated for storing MCU block numbers, corresponding MCU block coordinates, and corresponding MCU block editing lists. When an editing operation to the image is received, the editing operation is saved to a group of the MCU block editing lists of a group of the MCUs affected by the editing operation. Later the MCUs are retrieved from the JPEG bit stream one at a time and then processed according to the editing operations in the corresponding MCU blocking editing lists.
摘要翻译: 提供一种用于处理表示图像的联合图像专家组(JPEG)比特流中的最小编码单元(MCU)的方法。 生成数据结构,用于存储MCU块号,相应的MCU块坐标以及相应的MCU块编辑列表。 当接收到对图像的编辑操作时,编辑操作被保存到受编辑操作影响的一组MCU的MCU块编辑列表的组中。 之后,一次一个地从JPEG位流检索MCU,然后根据相应的MCU阻塞编辑列表中的编辑操作进行处理。
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公开(公告)号:US07400782B2
公开(公告)日:2008-07-15
申请号:US10230786
申请日:2002-08-28
申请人: Lingxiang Zhou , Yushan Huang
发明人: Lingxiang Zhou , Yushan Huang
IPC分类号: G06K9/36
CPC分类号: G06K9/209 , G06K2009/2045 , G06T3/4038
摘要: A method for creating a 360 degree panoramic image from multiple images includes (1) computing a gross rotation error ΔR between a first image and a calculated first image rotated to be stitched to a last image, and (2) spreading the gross rotation error ΔR to each pixel on the panoramic image. Spreading the gross rotation error ΔR includes (1) computing a rotation angle θ0 and rotational axis n0 from the gross rotational error ΔR, (2) determining an angle α of each pixel, and (3) determining a compensation matrix Rc for each pixel using the following formula: Rc(α)=R(α/2πθ0). Spreading the gross rotation error ΔR further includes (4) tracing a pixel on the panoramic image to a camera optical center of the images to form a first ray, (5) determining a second ray originating from the camera optical center that would be rotated by the compensation matrix Rc to coincide with the first ray, (6) tracing the second ray to a second pixel on one of the images, and (7) painting the first pixel with color values of the second pixel.
摘要翻译: 一种用于从多个图像创建360度全景图像的方法包括:(1)计算第一图像与被旋转以被拼接到最后图像的计算出的第一图像之间的总旋转误差ΔR,以及(2)扩展总旋转误差ΔR 到全景图像上的每个像素。 扩展总旋转误差ΔR包括(1)从总旋转误差ΔR计算旋转角θ0和旋转轴n <0>,(2)确定角度α 每个像素,以及(3)使用以下公式确定每个像素的补偿矩阵R C1:R(α)= R(α/ 2 pitheta≠0 SUB>)。 总旋转误差ΔR进一步包括(4)将全景图像上的像素追踪到图像的相机光学中心以形成第一射线,(5)确定源自相机光学中心的第二射线,其将被旋转 补偿矩阵R&lt; c&gt;与第一射线一致,(6)将第二射线追踪到其中一个图像上的第二像素,以及(7)用第二像素的颜色值绘制第一像素 像素。
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公开(公告)号:US20080031541A1
公开(公告)日:2008-02-07
申请号:US11836089
申请日:2007-08-08
申请人: Donghui Wu , Lingxiang Zhou
发明人: Donghui Wu , Lingxiang Zhou
IPC分类号: G06K9/36
CPC分类号: G06T5/006
摘要: A method for correcting a radial distortion in an image includes receiving a radial distortion parameter from the user and calculating new intensity values of points in the image to correct a radial exposure distortion in the image.
摘要翻译: 用于校正图像中的径向失真的方法包括从用户接收径向失真参数并计算图像中的点的新强度值以校正图像中的径向曝光失真。
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公开(公告)号:US06898316B2
公开(公告)日:2005-05-24
申请号:US10010053
申请日:2001-11-09
申请人: Lingxiang Zhou
发明人: Lingxiang Zhou
CPC分类号: H04N1/3872 , G06T7/12 , G06T2207/10008 , G06T2207/20132
摘要: A method for detecting an image area in a digital image includes identifying in the digital image a first image region indicative of a background area and a second image region indicative of the image area, computing gradient values using the pixel values of the digital image, defining a list of strokes based on the gradient values, merging the list of strokes, defining a list of corners using the list of strokes, and defining an image area rectangle delimiting the image area using the list of corners and the list of strokes. The image area rectangle can be used to define a binding box for extracting the image area from the digital image. The method enables the automatic detection of multiple image areas in a digital image. Moreover, the method implements a robust algorithm for image area detection such that even imperfect image areas can be detected without errors.
摘要翻译: 用于检测数字图像中的图像区域的方法包括在数字图像中识别指示背景区域的第一图像区域和指示图像区域的第二图像区域,使用数字图像的像素值来计算梯度值,定义 基于梯度值的笔画列表,合并笔画列表,使用笔画列表定义角色列表,以及使用角色列表和笔画列表定义分隔图像区域的图像区域矩形。 图像区域矩形可用于定义用于从数字图像中提取图像区域的装订箱。 该方法能够自动检测数字图像中的多个图像区域。 此外,该方法实现用于图像区域检测的鲁棒算法,使得即使不精确地检测到不完美的图像区域。
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