-
公开(公告)号：KR1020080070244A
公开(公告)日：2008-07-30
申请号：KR1020070008018
申请日：2007-01-25
Applicant: (주)마무리안디자인
CPC classification number: H04N19/43 , H04N19/132 , H04N19/176 , H04N19/51
Abstract: A motion estimating method is provided to reduce degradation of a compression rate of a video compression codec due to inaccuracy of motion estimation, and reduce the amount of calculation and hardware complexity in the motion estimating process. The first bit-plane of S2BT is created by using a mean value of pixels in a threshold window(100). A resonable local threshold is obtained by using second differentiation values of an image to create the second bit-plane(102). An SMVP(Spatial Motion Vector Prediction) scheme using edge information obtained by the second differentiation values of the image and motion vector information of peripheral MB(MicroBlocks) is used to avoid a binary matching process with a large amount of calculation(104). A best correlation between an MB of a previous frame and that of a current frame is searched by using only 1-bit boolean operators with respect to the two bit-planes as obtained(106).
Abstract translation: 提供了一种运动估计方法，以减少由于运动估计的不精确性导致的视频压缩编解码器的压缩率的降低，并减少运动估计过程中的计算量和硬件复杂度。 通过使用阈值窗口（100）中的像素的平均值来创建S2BT的第一位平面。 通过使用图像的第二微分值来创建第二位平面（102）来获得可共振的局部阈值。 使用通过图像的第二微分值和外围MB（MicroBlock）的运动矢量信息获得的边缘信息的SMVP（空间运动矢量预测）方案来避免具有大量计算的二进制匹配处理（104）。 通过仅使用获得的两个位平面的1位布尔运算符来搜索先前帧的MB和当前帧的MB之间的最佳相关性（106）。
-
公开(公告)号：KR100671040B1
公开(公告)日：2007-01-17
申请号：KR1020050069927
申请日：2005-07-29
Applicant: 재단법인서울대학교산학협력재단 , (주)마무리안디자인
IPC: H04N19/587
CPC classification number: H04N19/577 , H04N19/139 , H04N19/159 , H04N19/44 , H04N19/513 , H04N19/587
Abstract: A frame interpolating apparatus and a frame interpolating method are provided to insert an interpolated frame generated by a corrected motion vector between frames sent from an encoder to improve the quality of an output image. A frame interpolating apparatus includes a decoder(1) for receiving encoded video data and a motion vector from an encoder and decoding the encoded video data, an object segmentation module(2) for segmenting the decoded image received from the decoder by objects, and a motion vector correction module(3) for correcting the motion vector according to the decoded image received from the decoder and the motion vector. The apparatus further includes a pixel motion vector generation module(4) for generating a motion vector with respect to each pixel according to object segmentation information from the object segmentation module and the motion vector corrected by the motion vector correction module, and a motion compensated frame interpolation module(5) for generating an interpolated frame according to the motion vector with respect to each pixel.
Abstract translation: 提供帧内插装置和帧内插方法，以便在从编码器发送的帧之间插入由校正的运动矢量产生的内插帧，以提高输出图像的质量。 帧内插装置包括：解码器（1），用于从编码器接收编码视频数据和运动矢量并对编码视频数据进行解码;对象分割模块（2），用于分割由解码器从对象接收的解码图像;以及 用于根据从解码器接收的解码图像和运动矢量校正运动矢量的运动矢量校正模块（3）。 该装置还包括：像素运动矢量生成模块（4），用于根据来自对象分割模块的对象分割信息和由运动矢量校正模块校正的运动矢量，生成关于每个像素的运动矢量;以及运动补偿帧 插值模块（5），用于根据关于每个像素的运动矢量生成内插帧。
-
公开(公告)号：KR1020080070242A
公开(公告)日：2008-07-30
申请号：KR1020070008015
申请日：2007-01-25
Applicant: (주)마무리안디자인
IPC: H04N19/89
CPC classification number: H04N19/895 , H04N19/105 , H04N19/117 , H04N19/139 , H04N19/14 , H04N19/176
Abstract: An error concealing apparatus and a method thereof are provided to obtain a sharp image without an edge breakup between a normally received image block and a concealed image block in an unstable communication environment. A decoder(1) receives video data coded by a coder and motion vectors, and decodes them. An edge detecting module(2) detects an edge of the decoded image received from the decoder. An object detecting module(3) detects an object through the decoded image and the detected edge received from the decoder. An error concealing module(4) variably selects neighbor blocks by using the object information obtained from the edge detecting module and the object detecting module, and performs block matching.
Abstract translation: 提供了一种错误隐藏装置及其方法，以在不稳定的通信环境中获得无正常接收的图像块和隐藏图像块之间的边缘分裂的清晰图像。 解码器（1）接收由编码器和运动矢量编码的视频数据，并对它们进行解码。 边缘检测模块（2）检测从解码器接收的解码图像的边缘。 对象检测模块（3）通过解码图像和从解码器接收到的检测到的边缘来检测对象。 错误隐藏模块（4）通过使用从边缘检测模块和对象检测模块获得的对象信息可变地选择相邻块，并执行块匹配。
-
Patent Agency Ranking
公开(公告)号：KR100696451B1
公开(公告)日：2007-03-19
申请号：KR1020050099360
申请日：2005-10-20
Applicant: 재단법인서울대학교산학협력재단 , (주)마무리안디자인
IPC: H04N7/24
CPC classification number: H04N19/428 , H04N19/124 , H04N19/132 , H04N19/176
Abstract: A video frame re-compressing method in which a down-sampling type and a maximum-minimum quantization type are combined and an apparatus therefor are provided to combine the down-sampling type and the maximum-minimum quantization type which are relatively simple without using a frequency conversion type in which a hardware size is greatly occupied and a processing time is required for a long time. A re-compressor includes a down-sampling unit(10), an analyzing unit(20), a quantization unit(30), and an integrating unit(40). The down-sampling unit(10) compresses a unit block in horizontal and vertical two directions. The analyzing unit(20) analyzes a result outputted from the down-sampling unit(10), and selects pixels down-sampled in the direction in which difference between the maximum value and the minimum value is greatly generated between the two directions. The quantization unit(30) quantizes and re-compresses the respective pixels down-sampled in the direction selected by the analyzing unit(20). The integrating unit(40) integrates the re-compression data quantized in the quantization unit(30) and a header for inverse compression, and transmits the integrated data to a memory.
Abstract translation: 提供一种下采样类型和最大最小量化类型被组合的视频帧重新压缩方法及其装置，用于组合相对简单的下采样类型和最小最小量化类型，而不使用 频率转换类型，其中硬件尺寸被大量占用并且长时间需要处理时间。 重新压缩机包括下采样单元（10），分析单元（20），量化单元（30）和积分单元（40）。 下采样单元（10）在水平和垂直两个方向上压缩单位块。 分析单元（20）分析从下采样单元（10）输出的结果，并且选择在两个方向之间极大地产生最大值和最小值之间的差异的方向上进行下采样的像素。 量化单元（30）对由分析单元（20）选择的方向进行下采样的各个像素进行量化和重新压缩。 积分单元（40）对量化单元（30）中量化的再压缩数据和用于逆压缩的报头进行积分，并将积分数据发送到存储器。
-
公开(公告)号：KR1020070014913A
公开(公告)日：2007-02-01
申请号：KR1020050069926
申请日：2005-07-29
Applicant: 재단법인서울대학교산학협력재단 , (주)마무리안디자인
IPC: H04N5/232
CPC classification number: H04N5/23254 , G06T7/223
Abstract: A fluctuation correcting method in a photographing device is provided to reduce quantity of calculation if the photographing device is shaken by the fluctuation or the like, thereby correcting the fluctuation in real time and improving quality of an image. A fluctuation correcting method in a photographing device comprises the following steps of: selecting a sub image(100); generating an LMV(Local Motion Vector)(104); obtaining a GMV(Global Motion Vector) by performing global motion estimation by using the LMVs each obtained at sub image areas(106); and determining whether the GMV, obtained in the above second step, is motion intended by a user, and performing global motion correction for correcting an image if the motion is not intended motion(108).
Abstract translation: 如果拍摄装置被波动等振动，则提供拍摄装置中的波动校正方法以减少计算量，从而实时校正波动并提高图像的质量。 拍摄装置中的波动校正方法包括以下步骤：选择子图像（100）; 生成LMV（局部运动矢量）（104）; 通过使用在子图像区域（106）中获得的LMV来执行全局运动估计来获得GMV（全球运动矢量）; 以及确定在上述第二步骤中获得的GMV是否是用户想要的运动，并且如果运动不是预期的运动，则执行用于校正图像的全局运动校正（108）。
-
公开(公告)号：KR100923029B1
公开(公告)日：2009-10-22
申请号：KR1020070095820
申请日：2007-09-20
Applicant: (주)마무리안디자인
IPC: H04N19/40 , H04N19/90 , H04N19/129
Abstract: 본 발명에는 H.264/AVC의 인트라 예측 과정에서 얻을 수 있는 정보를 이용하여 해당 비디오 프레임의 화질에 미치는 영향을 최소화하면서 사용되는 메모리를 줄이는 방법과 그 구현 장치가 개시된다.
본 발명의 구체적 특징은 특정 비디오 프레임을 소정의 단위블록들로 분할하고 상기 단위블록을 재압축하는 비디오 프레임 재압축 방법에 있어서: 상기 단위 블록을 양자화로 압축하는 제 1차 압축단계와; 상기 단위 블록의 인트라 예측 처리과정에서 사용한 스캔 모드를 바탕으로 DPCM 스캔 순서를 결정하는 단계와; 결정된 DPCM 스캔 순서에 따라 DPCM을 수행하고 코드길이가 기설정된 값보다 작아질 때 까지 양자화 계수를 증가시면서 Golumb-Rice 코드 변환을 수행하는 제 2차 압축단계와; 제 2차 압축단계 결과로 얻어진 결과를 사용된 스캔 모드값, 양자화 계수값과 함께 통합하여 메모리로 전송하는 단계를 포함하는 것이다.
재압축, DPCM, 스캔모드, 비디오 프레임-
公开(公告)号：KR1020090030478A
公开(公告)日：2009-03-25
申请号：KR1020070095820
申请日：2007-09-20
Applicant: (주)마무리안디자인
IPC: H04N19/40 , H04N19/90 , H04N19/129
CPC classification number: H04N19/428 , H04N19/11 , H04N19/124 , H04N19/129 , H04N19/176
Abstract: A method for re-compressing a video frame is provided to re-compress the video frame stored in a memory when encoding or decoding a digital image. A unit block is quantized and compressed. A DPCM(Differential Pulse Coded Modulation) scan order is determined based on the scan mode used in the intra prediction processing step of the unit block. According to the determined DPCM scan order, the DPCM is performed. Until a code length becomes smaller than a preset value, a quantization coefficient is increased and at the same time, the GR(Golumb-Rice) code conversion is performed. A scan mode value in which the performed result is used and the quantization coefficient value are integrated and transmitted to a memory.
Abstract translation: 提供了一种用于重新压缩视频帧的方法，用于在对数字图像进行编码或解码时重新压缩存储在存储器中的视频帧。 单位块被量化和压缩。 基于在单位块的帧内预测处理步骤中使用的扫描模式来确定DPCM（差分脉冲编码调制）扫描顺序。 根据确定的DPCM扫描顺序，执行DPCM。 在代码长度变得小于预设值之前，增加量化系数，同时执行GR（Golumb-Rice）代码转换。 使用执行结果并将量化系数值整合并发送到存储器的扫描模式值。
-
公开(公告)号：KR100827794B1
公开(公告)日：2008-05-07
申请号：KR1020050069926
申请日：2005-07-29
Applicant: 재단법인서울대학교산학협력재단 , (주)마무리안디자인
IPC: H04N5/232
Abstract: 본 발명의 목적은 촬상장치가 손떨림등에 의해 흔들리게 되는 경우 이미지의 흔들림을 보정하기 위한 것으로, 특히 계산량을 작게 하여 손떨림에 대한 보정을 실시간으로 이루어질 수 있도록 하면서도 이미지의 품질을 높일 수 있도록 하기 위한 것이다.
상기 목적을 달성하기 위한 본 발명의 특징은 이미지 배경의 LMV(local motion vector)를 얻기 위해서 이미지에서 소정의 개수로 서브 이미지(sub image)들의 영역과 위치를 선택하는 서브 이미지 선택단계; 상기 서브 이미지 선택단계에서 선택된 서브 이미지 영역의 픽셀에 대하여 이차 편미분을 수행하고, 2차 편미분 값이 임계값보다 큰 값만 저장한다. 그리고 보완적으로 2차 편미분 값이 임계값보다 작더라도 에지나 이미지 패턴들이 없는 곳에서 나타나는 패턴같이 눈에 잘 띄는 부분들을 찾아 특징적인 공간(characteristic space)에 표시하여 저장한다. 저장된 값들을 이용하여 특성 추출(feature extraction)과 로컬 움직임 추정(local motion estimation)을 수행하여 LMV(local motion vector)를 얻는 LMV 생성단계; 상기 LMV 생성단계에서 얻어진 상기 서브 이미지 영역들 각각에서 얻어진 LMV들을 사용하여 전역 움직임 추정(global motion estimation)을 수행하여 GMV(global motion vector)를 얻는 GMV 생성단계; 및 상기 GMV 생성단계에서 얻어진 GMV가 사용자의 의도된 움직임인지 의도되지 않은 움직임인지 여부를 판단하여 의도되지 않은 움직임인 경우 이미지를 보정하는 전역 움직임 보정(global motion correction) 을 수행하는 단계를 포함한다.
손떨림 보정, digital image stabilizer, global motion vector
-
-
-
-
-
-
-
Search Results
8
records
(took 0.02 seconds)
