公开(公告)号：US06501861B1

公开(公告)日：2002-12-31

申请号：US09398003

申请日：1999-09-16

申请人： Dae-sung Cho ,  Se-hoon Son ,  Jae-seob Shin

发明人： Dae-sung Cho ,  Se-hoon Son ,  Jae-seob Shin

IPC分类号： G06K936

CPC分类号： H04N1/646 ,  G06T9/20 ,  H04N19/186 ,  H04N19/21 ,  H04N19/63 ,  H04N19/649

摘要： Shape information is scalably encoded and decoded by interleaved scan line (ISL) and raster scan line (RSL) methods and the encoded and decoded shape information is used for encoding texture information. The shape information of a chrominance (UV) component is encoded to compensate for the chrominance (UV) component. The encoding method is independently applied to the shape and texture component of each block. A scalable encoder of a still image using wavelets compresses pixels by using the characteristics between ISL pixels in a shape of the layer to be encoded or pixels between two layers in encoding the shape between layers. It is therefore possible to restore the shape and texture at high speed by performing the scalable encoding according to resolution, such as for searching for an image in a database/library. Also, tile coding a large image field to independently restore desired parts is fast and efficient.

摘要翻译： 形状信息通过交错扫描线（ISL）和光栅扫描线（RSL）方法进行可扩展编码和解码，编码和解码的形状信息用于编码纹理信息。 编码色度（UV）分量的形状信息以补偿色度（UV）分量。 编码方法独立地应用于每个块的形状和纹理分量。 使用小波的静止图像的可缩放编码器通过使用要编码的层的形状的ISL像素之间的特性或者在层之间的形状进行编码来在两层之间的像素之间的特性来压缩像素。 因此，可以通过根据分辨率执行可缩放编码（例如用于在数据库/库中搜索图像）来高速恢复形状和纹理。 而且，用于独立地恢复所需部分的大图像场的瓦片编码是快速和有效的。

公开(公告)号：US6002813A

公开(公告)日：1999-12-14

申请号：US87278

申请日：1998-05-29

申请人： Dae-sung Cho ,  Jae-seob Shin

发明人： Dae-sung Cho ,  Jae-seob Shin

IPC分类号： G06T3/40 ,  G06K9/32

CPC分类号： G06T3/4007

摘要： An improved interpolation method in which a threshold value used for determining a pixel value of a pixel generated by interpolation according to a context which is a state value of adjacent pixels. In the interpolation method, the ambiguity between the interpolation value and the threshold value is removed by using the context, thereby reducing the blocking and smoothing phenomena in the restored binary image.

公开(公告)号：US5959674A

公开(公告)日：1999-09-28

申请号：US933900

申请日：1997-09-19

申请人： Euee-seon Jang ,  Dae-sung Cho

发明人： Euee-seon Jang ,  Dae-sung Cho

IPC分类号： G06T9/00 ,  H03M7/30 ,  H04N1/41 ,  H04N19/103 ,  H04N19/134 ,  H04N19/136 ,  H04N19/176 ,  H04N19/189 ,  H04N19/196 ,  H04N19/60 ,  H04N19/625 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC分类号： H04N19/593 ,  H04N19/60

摘要： A method for prediction a discrete cosine transform (DCT) coefficient is provided. In the prediction method, DC coefficients of adjacent blocks are used. For selecting a DC coefficient to be used for the prediction, the maximum and the minimum among the DC coefficients of the adjacent blocks are selected, and then the maximum or minimum value which is closest to the current DC coefficient is used for the prediction value for the current block. Therefore, prediction performance for DC/AC coefficients can be improved in a DCT domain.

摘要翻译： 提供了一种用于预测离散余弦变换（DCT）系数的方法。 在预测方法中，使用相邻块的DC系数。 为了选择要用于预测的DC系数，选择相邻块的DC系数中的最大值和最小值，然后将最接近当前DC系数的最大值或最小值用于 当前块。 因此，可以在DCT域中提高DC / AC系数的预测性能。