公开(公告)号：US4884148A

公开(公告)日：1989-11-28

申请号：US264710

申请日：1988-10-31

申请人： Osamu Ishikawa ,  Mikihiko Sone ,  Yoshimi Suzuki

发明人： Osamu Ishikawa ,  Mikihiko Sone ,  Yoshimi Suzuki

IPC分类号： H04N1/403

CPC分类号： H04N1/403

摘要： A circuit for converting a video signal into binary signals comprising a line image sensor for performing photoelectric conversion of an object to be read thereby producing pixel signals. Means are also provided for setting reference levels for respective sections of the line image sensor, the sections being divisions of the entire length of the line image sensor. A comparator compares each pixel signal with the reference level for the section to which the pixel signal in question belongs, to produce a binary signal. An interpolator is further provided for receiving the digital reference level data as is a D/A converter for converting the output of the interpolator to an analog reference level signal and supplying it to the comparator.

摘要翻译： 一种用于将视频信号转换为二进制信号的电路，包括用于执行要读取的对象的光电转换的线形图像传感器，从而产生像素信号。 还提供了用于设置线状图像传感器的各个部分的基准电平的装置，这些部分是线形图像传感器的整个长度的分割。 比较器将每个像素信号与所讨论的像素信号所属的部分的参考电平进行比较，以产生二进制信号。 进一步提供一个用于接收数字参考电平数据的内插器，如D / A转换器，用于将内插器的输出转换为模拟参考电平信号并将其提供给比较器。

公开(公告)号：US4853793A

公开(公告)日：1989-08-01

申请号：US116863

申请日：1987-11-04

申请人： Osamu Ishikawa ,  Mikihiko Sone ,  Yoshimi Suzuki

发明人： Osamu Ishikawa ,  Mikihiko Sone ,  Yoshimi Suzuki

IPC分类号： H04N1/403

CPC分类号： H04N1/403

摘要： A circuit for converting a video signal into binary signals comprises a line image sensor for performing photoelectric conversion of an object to be read, to produce pixel signals, means for setting reference levels for respective sections of the line image sensor, the sections being divisions of the entire length of the line image sensor, and a comparator for comparing each pixel signal with the reference level for the section to which the pixel signal in question belongs, to produce a binary signal. The setting means includes means for producing digital reference level data and a D/A converter for converting the digital reference level data into an analog reference level signal.

摘要翻译： 用于将视频信号转换为二进制信号的电路包括用于执行要读取的对象的光电转换以产生像素信号的行图像传感器，用于设置行图像传感器的各个部分的参考电平的装置， 线图像传感器的整个长度，以及用于将每个像素信号与所考虑的像素信号所属部分的参考电平进行比较以产生二进制信号的比较器。 设置装置包括用于产生数字参考电平数据的装置和用于将数字参考电平数据转换为模拟参考电平信号的D / A转换器。