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公开(公告)号：KR100796849B1
公开(公告)日：2008-01-22
申请号：KR1020060084880
申请日：2006-09-04
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
IPC: H04N5/262
CPC classification number: G06K9/36 , G06K2009/2045 , G06T3/4038
Abstract: A method for capturing a panorama mosaic image in a mobile terminal is provided to perform mosaic configuration with a relatively simple calculation by using limited hardware resources. A portion of a previously captured image is displayed as a guide image on an LCD(Liquid Crystal Display) viewer of a currently captured image and a plurality of images constituting a mosaic image is captured according to user manipulation(30). When the captured image is obtained in a panorama mode, projection transformation can be approximated to a rotational transformation matrix and each image is re-projected to a common cylindrical curved surface(32). Overlapped images of the re-projected images are locally aligned to determine an optimal position by using a hexagonal search scheme(34). Image stitching is performed on the overlapped regions by using a dynamic programming scheme to determine a boundary for connecting the overlapped images most naturally(36). A blending process is performed by removing a sudden change of brightness and the color sense based on the boundary region of the images(38).
Abstract translation: 提供一种用于在移动终端中捕获全景马赛克图像的方法，以通过使用有限的硬件资源以相对简单的计算来执行马赛克配置。 先前拍摄的图像的一部分作为引导图像显示在当前拍摄图像的LCD（液晶显示器）观察器上，并且根据用户操纵（30）捕获构成马赛克图像的多个图像。 当以全景模式获得拍摄图像时，可以将投影变换近似为旋转变换矩阵，并且将每个图像重新投影到公共圆柱形曲面（32）。 重新投影的图像的重叠图像被局部对齐以通过使用六边形搜索方案来确定最佳位置（34）。 通过使用动态规划方案在重叠区域上执行图像拼接，以确定用于最重要地连接重叠图像的边界（36）。 通过基于图像的边界区域去除亮度和颜色感觉的突然变化来执行混合处理。
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公开(公告)号：KR1020070087455A
公开(公告)日：2007-08-28
申请号：KR1020060017881
申请日：2006-02-23
Applicant: 삼성전자주식회사 , 재단법인서울대학교산학협력재단
IPC: G06T3/40
CPC classification number: G06T3/4084 , H04N19/117 , H04N19/18 , H04N19/48 , H04N19/59 , H04N19/60
Abstract: An image resizing method using DCT(Discrete Cosine Transform) and an apparatus therefor are provided to easily resize an input image by performing coarse resizing for inputted image information and performing fine resizing. A receiving unit(810) receives a DCT coefficient of an input image. A transformation matrix determining unit(820) determines a transformation matrix for transforming the input image at a ratio approximate to a resizing ratio. A coarse resizing unit(830) performs the coarse resizing of the input image in a DCT region by using the transformation matrix. An IDCT(Inverse DCT) unit(880) performs IDCT in the coarse-resized region and acquires a spatial image. A fine resizing unit(890) performs the fine resizing of the spatial image in a space region and forms an output image.
Abstract translation: 提供了使用DCT（离散余弦变换）及其装置的图像尺寸调整方法，以便通过对输入的图像信息进行粗调整并执行精细调整大小来容易地调整输入图像的大小。 接收单元（810）接收输入图像的DCT系数。 变换矩阵确定单元（820）确定用于以接近于调整大小比率的比率变换输入图像的变换矩阵。 粗调整单元（830）通过使用变换矩阵在DCT区域中执行输入图像的粗调整。 IDCT（逆DCT）单元（880）在粗调大小区域中执行IDCT并获取空间图像。 精细调整单元（890）在空间区域中执行空间图像的精细调整，并形成输出图像。
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公开(公告)号：KR100561164B1
公开(公告)日：2006-03-15
申请号：KR1020040077066
申请日：2004-09-24
Applicant: 이피네트시스템즈 주식회사 , 재단법인서울대학교산학협력재단
IPC: H04N19/124 , H04N19/60
Abstract: 본 발명은 JPEG, MPEG등과 같은 압축된 이미지 파일을 재압축하여 화면에 디스플레이할 때 나타나는 블록화 현상 등의 에러를 감소시키는 압축 영상의 트랜스코딩을 위한 DCT계수 재양자화 기법에 관한 것으로, 기존의 방법과 달리 정해진 양자화 사이즈는 변경하지 않고 모든 원하는 양자화 사이즈에 대하여 재양자화 에러를 작게 하는 방향으로 직접 DCT 계수를 변환하는 기법을 적용함으로써 원하는 비트율로 영상을 줄이는 동시에 화질도 향상시킬 수 있다.
DCT 계수, 재양자화, 트랜스코딩, 라플라시안 분포, 재양자화 에러-
公开(公告)号：KR1020050007208A
公开(公告)日：2005-01-17
申请号：KR1020040077066
申请日：2004-09-24
Applicant: 이피네트시스템즈 주식회사 , 재단법인서울대학교산학협력재단
IPC: H04N19/124 , H04N19/60
CPC classification number: H04N19/126 , H04N19/40 , H04N19/625
Abstract: PURPOSE: A DCT(Discrete Cosine Transform) coefficient requantization method is provided to reduce an image to a degree of a desired bit rate and improve image quality by directly converting a DCT coefficient toward a trend of decreasing a requntization error. CONSTITUTION: An interval where an error can arise is determined and DCT coefficients having capability of a requntization error are searched in the interval(S10). A combination of the DCT coefficients searched is obtained, wherein the DCT coefficients have least capability of the requntization error(S20). The combination obtained is determined as a new requntization coefficient(S30).
Abstract translation: 目的：提供DCT（离散余弦变换）系数重新量化方法，以通过将DCT系数直接转换为减少再补偿误差的趋势，将图像减少到期望比特率的程度并提高图像质量。 构成：确定可能发生错误的间隔，并且在间隔（S10）中搜索具有重新补偿误差能力的DCT系数。 获得所搜索的DCT系数的组合，其中DCT系数具有最小的再补偿误差能力（S20）。 所获得的组合被确定为新的再补充系数（S30）。
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公开(公告)号：KR100790534B1
公开(公告)日：2008-01-02
申请号：KR1020060072602
申请日：2006-08-01
Applicant: 주식회사 몬도시스템즈 , 재단법인서울대학교산학협력재단
CPC classification number: G06F17/141 , G06F7/4806
Abstract: A signal processing apparatus and method employing a convolution overlap-save scheme are provided to perform a QDFT(Quarter Discrete Fourier Transform) coefficient operation only on a new sample by using a filtering result for a previous sample existing in a single data block. A filtering result of the first sample inputted to a data block is stored in a buffer(S300). When the second sample is inputted to the data block, a half of the second sample is filled in the data block(S302). A QDFT coefficient of the data block filled with a half of the second sample and that of a filter are calculated(S304,S306). The calculated QDFT coefficients are multiplied by a multiplier and then converted into time domains by using IQDFT(Inverse QDFT)(S308). A real number part of the converted result and the filtering result value of the first sample stored in the buffer are added by an adder to obtain an output(S310).
Abstract translation: 提供采用卷积重叠保存方案的信号处理装置和方法，以通过使用存在于单个数据块中的先前样本的滤波结果，仅对新样本执行QDFT（四分之一离散傅里叶变换）系数操作。 将输入到数据块的第一样本的滤波结果存储在缓冲器（S300）中。 当第二样本被输入到数据块时，第二样本的一半被填充在数据块中（S302）。 计算填充有第二样本的一半和滤波器的一半的数据块的QDFT系数（S304，S306）。 计算的QDFT系数乘以乘数，然后通过使用IQDFT（逆QDFT）（S308）将其转换为时域。 转换结果的实数部分和存储在缓冲器中的第一样本的滤波结果值由加法器相加以获得输出（S310）。
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Patent Agency Ranking
公开(公告)号：KR100823145B1
公开(公告)日：2008-04-18
申请号：KR1020060064486
申请日：2006-07-10
Applicant: (주) 어니언홀딩스 , 재단법인서울대학교산학협력재단
IPC: H04N19/167
Abstract: 본 발명은 ROI 기반의 영상 화질개선장치 및 그 동작 방법에 관한 것으로서, 양자화 계수에 한계치를 두어 이를 초과하는 비트량에 대해서는 비관심영역에서 초과된 비트량을 제거함을 특징으로 한다. 본 발명의 ROI기반 양자화기는, 색상정보를 이용하여 상기 영상의 중요부분인 관심영역과 중요부분이 아닌 비관심영역을 검출하는 ROI 검출모듈과, 비트율 제어에 의해 목표된 목표 양자화 계수(QP
target )가 미리 설정된 최대 양자화 계수(QP
max )보다 작거나 같은 경우에는 상기 목표 양자화 계수(QP
target )로 양자화하며, 상기 목표 양자화 계수(QP
target )가 미리 설정된 최대 양자화 계수(QP
max )보다 큰 경우에는 상기 최대 양자화 계수(QP
max )로 양자화를 수행한 후 목표된 비트량보다 초과되는 초과 비트량이 있는지를 검출하는 R-QP 평가모듈과, 상기 R-QP 평가모듈에서 초과되는 비트량이 검출될 시에는 해당 초과 비트량을 상기 비관심영역에서 제거하는 쓰레솔드 작업모듈을 구비한다.
H.263, 동영상, 영상, ROI, 화질, 필터, 양자화, QP, VLC-
公开(公告)号：KR1020070076243A
公开(公告)日：2007-07-24
申请号：KR1020060005397
申请日：2006-01-18
Applicant: (주) 어니언홀딩스 , 재단법인서울대학교산학협력재단
IPC: H04N19/85 , H04N19/167
CPC classification number: H04N19/85 , H04N19/167 , H04N19/80
Abstract: A method for enhancing low video quality of moving pictures in a mobile communication network, and an apparatus for realizing the same are provided to secure good quality by enhancing a specific part of a picture according to an object of moving pictures. A preprocessor(120) firstly performs a quality improving process in a whole picture region of inputted moving pictures. An ROI(Region Of Interest) filter(130) secondarily performs a quality improving process in a specific interested region of the moving pictures passing through the preprocessing. A decoder(110) decodes the inputted moving pictures for transmitting the decoded moving pictures to the preprocessor when the inputted moving pictures are encoded in a predetermined video standard.
Abstract translation: 提供一种用于增强移动通信网络中的运动图像的低视频质量的方法，以及用于实现该方法的装置，用于通过根据运动图像的对象增强图像的特定部分来确保良好的质量。 预处理器（120）首先在输入的运动图像的整个图像区域中执行质量改进处理。 ROI（感兴趣区域）滤波器（130）二次在通过预处理的运动图像的特定感兴趣区域中二次执行质量改进处理。 当输入的运动图像以预定的视频标准被编码时，解码器（110）将输入的运动图像解码以将解码的运动图像传送到预处理器。
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公开(公告)号：KR100916291B1
公开(公告)日：2009-09-10
申请号：KR1020080056383
申请日：2008-06-16
Applicant: 주식회사신도리코 , 재단법인서울대학교산학협력재단
Abstract: An apparatus and a method for detecting approaching vehicles and an outside mirror using the same are provided to prevent car accidents entering dead spaces by extracting motion vector from image obtained by photographing the rear part of the vehicle. An apparatus and a method for detecting approaching vehicles and an outside mirror using the same comprise a camera(110), and a controller(120). The camera photographs the rear area of a vehicle. The controller sets up one image as the standard image among a plurality of consecutive images which the camera photographs. The motion vector of the pixels in the standard image is detected with reference to one or more images among before or after images of the standard image. In case the traveling direction of the detected motion vector is analyzed and the pixels having the motion vector in the approaching direction is detected, the controller outputs alarm signal according to the access of objects.
Abstract translation: 提供一种用于检测接近车辆的装置和方法以及使用其的外部镜子，以通过从通过拍摄车辆的后部获得的图像中提取运动矢量来防止车祸进入死空间。 用于检测接近的车辆的装置和方法以及使用其的外部镜子包括照相机（110）和控制器（120）。 相机拍摄车辆的后部区域。 控制器在相机拍摄的多个连续图像中设置一个图像作为标准图像。 参照标准图像的图像之前或之后的一个或多个图像来检测标准图像中的像素的运动矢量。 在检测到的运动矢量的行进方向被分析并且检测到具有接近方向的运动矢量的像素的情况下，控制器根据物体的访问来输出报警信号。
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公开(公告)号：KR1020080005747A
公开(公告)日：2008-01-15
申请号：KR1020060064486
申请日：2006-07-10
Applicant: (주) 어니언홀딩스 , 재단법인서울대학교산학협력재단
IPC: H04N19/167
CPC classification number: H04N19/167 , H04N19/124 , H04N19/149 , H04N19/176 , H04N19/182 , H04N19/184 , H04N19/186 , H04N19/48 , H04N19/625
Abstract: An image improving apparatus, a quantizing device, and a quantizing method are provided to allot high bits to an ROI(Region Of Interest) and low bits to a non-ROI, thereby improving picture quality of an image. A pre-treatment unit(320) corrects images and boundaries so that a missed original image reaches an original image. An ROI-based encoder(330) performs an encoding operation on the image passed by the pre-treatment unit through a bit rate control where high bits are allotted to a specific ROI of the image and low bits are allotted to a non-ROI of the image. The ROI-based encoder includes a DCT(Discrete Cosine Transform)(334) divides the image into high-frequency component and low-frequency component by using a perpendicular relation between spatial domain and frequency domain. An ROI-based quantizing unit(335) quantizes the low-frequency component to generate a conversion coefficient, and resets the conversion coefficient of the non-ROI so that the high bits are allotted to the specific ROI and the low bits are allotted to the non-ROI. A VLC(Variable Length Coding) unit(336) removes spatial redundancy based on the conversion coefficient to finalize the encoding operation.
Abstract translation: 提供了一种图像改善装置，量化装置和量化方法，以将高位分配给ROI（感兴趣区域）和低位到非ROI，从而提高图像的图像质量。 预处理单元（320）校正图像和边界，使得错过的原始图像到达原始图像。 基于ROI的编码器（330）通过比特率控制对由预处理单元传递的图像执行编码操作，其中将高比特分配给图像的特定ROI，并且将低比特分配给非ROI的编码器 图片。 基于ROI的编码器包括DCT（离散余弦变换）（334），通过使用空间域和频域之间的垂直关系将图像划分为高频分量和低频分量。 基于ROI的量化单元（335）量化低频分量以产生转换系数，并且重置非ROI的转换系数，使得高位被分配给特定ROI，并且将低位分配给 非ROI。 VLC（可变长度编码）单元（336）基于转换系数去除空间冗余以完成编码操作。
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公开(公告)号：KR100764345B1
公开(公告)日：2007-10-08
申请号：KR1020060005397
申请日：2006-01-18
Applicant: (주) 어니언홀딩스 , 재단법인서울대학교산학협력재단
IPC: H04N19/85 , H04N19/167
Abstract: 이동통신단말기에서 재생되는 동영상의 화질을 개선하는 방법 및 이를 구현하는 장치가 제공된다. 이와 같은 화질 개선 장치는 입력된 동영상의 화면 전체 영역에 대하여 1차적으로 화질 개선 프로세스를 수행하는 전처리부 및 상기 전처리를 거친 동영상의 특정 관심 영역에 대하여 2차적으로 화질 개선 프로세스를 수행하는 ROI(Region Of Interest)필터를 포함하여 이루어지며, 상기 입력된 동영상이 소정의 비디오 규격으로 인코딩되어 있는 경우 이를 해당 비디오 규격에 따라 디코딩하여 상기 전처리부에 전달하는 디코더(Decoder)가 더 포함될 수 있다. 본 발명에 의하면 이동통신망의 특성상 저화질의 동영상이 전송되더라도 원하는 주요 부분만을 집중적으로 보정함으로써 상대적으로 고화질의 동영상인 것 같은 효과를 얻을 수 있게 된다.
이동통신단말기, H.263, MPEG, ROI 필터, deblocking, edge, contrast
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