公开(公告)号：US4575768A

公开(公告)日：1986-03-11

申请号：US476218

申请日：1983-03-17

申请人： Toshiyuki Sakai ,  Yoshihiro Okada ,  Masatoshi Hino ,  Yuichi Ohta

发明人： Toshiyuki Sakai ,  Yoshihiro Okada ,  Masatoshi Hino ,  Yuichi Ohta

IPC分类号： H04N1/403 ,  H04N1/40

CPC分类号： H04N1/403

摘要： A system for converting an analog video signal obtained by scanning an original image to be processed into a two-valued video signal such as an input portion of a facsimile machine includes a peak/valley extracting circuit for extracting peaks and valleys in the analog video signal before thresholding the analog video signal so as to determine an optimal threshold level to be used in thresholding. The peak/valley extracting circuit includes peak and valley thresholds in addition to the threshold to be used in thresholding the analog video signal to produce a two-valued video signal. The peak/valley extracting circuit is so structured to supply a peak/valley extraction signal if an extracted peak or valley also satisfies the condition that it is equal to or higher or lower in level than the peak or valley threshold.

摘要翻译： 将通过将要处理的原始图像扫描得到的模拟视频信号转换成诸如传真机的输入部分的二值视频信号的系统包括用于提取模拟视频信号中的峰谷的峰谷提取电路 在阈值化模拟视频信号之前，以确定要用于阈值处理的最佳阈值水平。 峰值/谷值提取电路除了用于阈值化模拟视频信号以产生二值视频信号的阈值之外还包括峰谷阈值。 如果所提取的峰或谷也满足等于或高于或低于峰值或谷值阈值的条件，则峰/谷提取电路被构造成提供峰谷提取信号。

公开(公告)号：US4525747A

公开(公告)日：1985-06-25

申请号：US405766

申请日：1982-08-06

申请人： Toshiyuki Sakai ,  Yuichi Ohta ,  Michihiko Minoh ,  Masatoshi Hino

发明人： Toshiyuki Sakai ,  Yuichi Ohta ,  Michihiko Minoh ,  Masatoshi Hino

IPC分类号： H03K5/08 ,  H04N1/403 ,  H04N1/40

CPC分类号： H04N1/403 ,  H03K5/082

摘要： A system for converting an analog image signal into a digital image signal is provided. The system comprises an analog-to-digital signal converter for producing a digital signal by subjecting an incoming analog signal to threshold processing with a threshold level. The system also comprises a peak/valley extracting circuit for extracting peak and valley points corresponding to thin lines and narrow gaps between lines, respectively, in the original image scanned. The extracted peak and valley points are utilized in the analog-to-digital conversion processing so as not to lose information as to thin lines and narrow gaps between lines. Especially, in extracting peak and valley points, the concentration or level of a particular picture element is compared with that of the adjacent picture elements at least in two directions.

摘要翻译： 提供了一种将模拟图像信号转换为数字图像信号的系统。 该系统包括用于通过使输入的模拟信号以阈值电平进行阈值处理来产生数字信号的模拟 - 数字信号转换器。 该系统还包括一个峰/谷提取电路，用于分别在扫描的原始图像中提取对应于细线的峰谷点和窄线之间的间隙。 所提取的峰值和谷点用于模数转换处理，以免丢失关于细线和线之间狭窄间隙的信息。 特别地，在提取峰谷点时，将特定像素的浓度或水平至少沿两个方向与相邻像素的浓度或水平进行比较。

公开(公告)号：US5173788A

公开(公告)日：1992-12-22

申请号：US651009

申请日：1991-02-05

申请人： Yuichi Ohta

发明人： Yuichi Ohta

IPC分类号： H04N1/40

CPC分类号： H04N1/40075 ,  A61B6/5258

摘要： In an image reading device for reading an original image, an original image is picked up and converted into two-dimensional positional image data represented in a two-dimensional positional coordinate system. The two-dimensional positional image data is further converted into two-dimensional spatial frequency image data represented in a two-dimensional spatial frequency coordinate system, and then into high frequency image data and low frequency image data. The high frequency image data is subjected to moire component selecting and depressing operations to correct the high frequency image data whose moire components are depressed, and then the low frequency image data and the corrected high frequency image data are reconverted into corrected two-dimensional positional image data, thereby reproducing the original image with no moire.

摘要翻译： 在用于读取原始图像的图像读取装置中，拾取原始图像并将其转换为二维位置坐标系中表示的二维位置图像数据。 二维位置图像数据进一步转换为二维空间频率坐标系中表示的二维空间频率图像数据，然后转换为高频图像数据和低频图像数据。 对高频图像数据进行莫尔分量选择和按压操作以校正其莫尔条纹成分被压下的高频图像数据，然后将低频图像数据和校正的高频图像数据重新转换为校正的二维位置图像 数据，从而在没有莫尔条纹的情况下再现原始图像。

公开(公告)号：US5079154A

公开(公告)日：1992-01-07

申请号：US252049

申请日：1988-09-30

申请人： Susumu Ito ,  Masaharu Shimooka ,  Yuichi Ohta ,  Mikio Takaiwa ,  Shigehito Adachi

发明人： Susumu Ito ,  Masaharu Shimooka ,  Yuichi Ohta ,  Mikio Takaiwa ,  Shigehito Adachi

IPC分类号： C12N9/26 ,  C12N9/42 ,  C12N9/54

CPC分类号： C12N9/2411 ,  C12N9/2408 ,  C12N9/2437 ,  C12N9/54 ,  C12R1/07 ,  C12Y302/01004

摘要： A mutant of an extracellular enzyme-producing microorganism belonging to genus Bacillus, which is resistant to a cell membrane synthesis inhibitor, including vancomycin and ristocetin, is disclosed. The cell membrane synthesis inhibitor-resistant mutant can produce such an enzyme as cellulase, protease, or amylase about 2 to 4 times of the parent strain. Such a mutant can be produced by subjecting an extracellular enzyme-producing microorganism tot a mutation treatment, and culturing said microorganism in a culture medium containing a cell membrane synthesis inhibitor.