公开(公告)号：US5377312A

公开(公告)日：1994-12-27

申请号：US858409

申请日：1992-03-27

申请人： Shigetada Kobayashi

发明人： Shigetada Kobayashi

IPC分类号： G06K15/00 ,  H04N1/00 ,  H04N1/32 ,  H04N1/41 ,  G06F15/62

CPC分类号： H04N1/32491 ,  G06K15/00 ,  H04N1/32358 ,  H04N1/41 ,  G06K2215/0065 ,  H04N1/00204 ,  H04N2201/0082 ,  H04N2201/3294

摘要： An image processing apparatus for expanding given compressed image data in combination with other compressed image data, provided with a retaining device which retains, at the successive expansions of the compressed data, information relative to the development of a certain area until the data development of an area next to the above-mentioned certain area.

摘要翻译： 一种用于将给定的压缩图像数据与其他压缩图像数据相结合的图像处理装置，其具有保持装置，该保持装置在压缩数据的连续扩展时保持与某一区域的开发相关的信息，直到数据开发 区域在上述某一区域之外。

公开(公告)号：US5140441A

公开(公告)日：1992-08-18

申请号：US406257

申请日：1989-09-12

申请人： Susumu Sugiura ,  Shigetada Kobayashi

发明人： Susumu Sugiura ,  Shigetada Kobayashi

IPC分类号： G06T1/00 ,  H04N1/40

CPC分类号： H04N1/40075

摘要： When image data binarized by a density-preserving type multilevel-coding method is to be recovered to multilevel image data, the size of a scanning window which includes as a central pixel point a pixel point to be subjected to multilevel coding is varied and the sums of data values of the binarized image data contained in the scanning windows corresponding to individual window sizes are sequentially calculated in the order of window size. If the sum of the binarized image data value reaches a predetermined threshold for each scanning window size, this window size is determined as a scanning window size for multilevel coding, and multilevel coding is executed. With this process, an optimum window size is determined which is suitable for use in effecting multilevel-coding with high image quality. Since multilevel coding employing the optimum window size is performed, multilevel coding with high image quality and high resolution is enabled.

摘要翻译： 当通过密度保持型多级编码方法二值化的图像数据被恢复到多级图像数据时，包括作为中心像素的扫描窗口的大小指向要进行多级编码的像素点的尺寸变化， 按照窗口大小的顺序顺序地计算包含在对应于各窗口尺寸的扫描窗口中的二值化图像数据的数据值。 如果二维化图像数据值的和对于每个扫描窗口大小达到预定阈值，则将该窗口大小确定为用于多级编码的扫描窗口大小，并且执行多级编码。 通过该处理，确定适合用于实现高图像质量的多级编码的最佳窗口大小。 由于执行采用最佳窗口大小的多级编码，因此能够实现高图像质量和高分辨率的多级编码。