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公开(公告)号：EP0580148A2
公开(公告)日：1994-01-26
申请号：EP93111696.6
申请日：1993-07-21
CPC分类号： H04N1/1026 , H04N1/0473 , H04N1/1013 , H04N1/1056 , H04N1/193 , H04N2201/02439 , H04N2201/0416 , H04N2201/0418 , H04N2201/0471 , H04N2201/04725 , H04N2201/04734 , H04N2201/04755 , H04N2201/04794
摘要： An image reading method and apparatus are capable of high-quality reading of a transparent original with an optimum light quantity by maintaining both a transmitting light source unit for emitting light for reading the transparent original and a reading scanner of an image reader for receiving the transmitted light at an adequate relative position to keep their optical axes in alignment during scan reading. Such alignment is achieved by providing synchronization in scanning speed by placing either one of the transmitting light source unit and the reading scanner at an arbitrary selected position, scanning the proximity of the selected position with the other, determining a light quantity distribution, determining a synchronous position from the distribution, carrying out such synchronous position detection at two or more distinct positions, and calculating the scanning speed ratio of the transmitting light source unit to the reading scanner from the result. Alternatively, alignment is achieved by carrying out similar synchronous position detection, determining the relative spacing between the base points of said transmitting light source and said reading scanner from the distances from the respective base points to the synchronous position, and matching the scan start positions of the transmitting light source unit and the reading scanner in accordance with the relative spacing.
摘要翻译： 图像读取方法和装置能够通过保持用于发射用于读取透明原稿的光的发送光源单元和用于接收所发送的图像读取器的图像读取器的读取扫描器，从而能够对具有最佳光量的透明原稿进行高质量读取 在足够的相对位置发光，以便在扫描读数期间保持其光轴对准。 通过将发送光源单元和读取扫描仪中的任一个放置在任意的选择位置，扫描所选择的位置的附近，确定光量分布，确定同步 从分布的位置，在两个或更多个不同位置执行这种同步位置检测，并从结果计算发送光源单元与读取扫描仪的扫描速度比。 或者，通过执行类似的同步位置检测来实现对准，从所述发射光源的基点与所述读取扫描仪的基点之间的距离与从各个基点到同步位置的距离确定，并且匹配扫描开始位置 传输光源单元和读取扫描器根据相对间距。
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公开(公告)号：EP0509549B1
公开(公告)日：1997-11-19
申请号：EP92106799.7
申请日：1992-04-21
CPC分类号： H04N1/00737 , H04N1/00681 , H04N1/00748 , H04N1/00758 , H04N1/00766 , H04N1/4074
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公开(公告)号：EP0580148A3
公开(公告)日：1994-04-06
申请号：EP93111696.6
申请日：1993-07-21
CPC分类号： H04N1/1026 , H04N1/0473 , H04N1/1013 , H04N1/1056 , H04N1/193 , H04N2201/02439 , H04N2201/0416 , H04N2201/0418 , H04N2201/0471 , H04N2201/04725 , H04N2201/04734 , H04N2201/04755 , H04N2201/04794
摘要： An image reading method and apparatus are capable of high-quality reading of a transparent original with an optimum light quantity by maintaining both a transmitting light source unit for emitting light for reading the transparent original and a reading scanner of an image reader for receiving the transmitted light at an adequate relative position to keep their optical axes in alignment during scan reading. Such alignment is achieved by providing synchronization in scanning speed by placing either one of the transmitting light source unit and the reading scanner at an arbitrary selected position, scanning the proximity of the selected position with the other, determining a light quantity distribution, determining a synchronous position from the distribution, carrying out such synchronous position detection at two or more distinct positions, and calculating the scanning speed ratio of the transmitting light source unit to the reading scanner from the result. Alternatively, alignment is achieved by carrying out similar synchronous position detection, determining the relative spacing between the base points of said transmitting light source and said reading scanner from the distances from the respective base points to the synchronous position, and matching the scan start positions of the transmitting light source unit and the reading scanner in accordance with the relative spacing.
摘要翻译： 一种图像读取方法和设备能够通过保持用于发射用于读取透明原件的光的发送光源单元和用于接收发送的图像读取器的读取扫描仪来以最佳光量高质量读取透明原稿 光线处于适当的相对位置以在扫描读取期间保持其光轴对齐。 通过将发射光源单元和读取扫描器中的任一个放置在任意选定的位置，扫描所选位置与另一个位置的接近，确定光量分布，确定同步 从分布位置开始，在两个或多个不同位置处执行这种同步位置检测，并从结果中计算发送光源单元对读取扫描器的扫描速度比。 或者，通过执行类似的同步位置检测来实现对准，从各基点到同步位置的距离确定所述发射光源和所述读取扫描器的基点之间的相对间距，并将扫描开始位置 发射光源单元和读取扫描器根据相对间隔。
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公开(公告)号：EP0580148B1
公开(公告)日：1997-10-22
申请号：EP93111696.6
申请日：1993-07-21
CPC分类号： H04N1/1026 , H04N1/0473 , H04N1/1013 , H04N1/1056 , H04N1/193 , H04N2201/02439 , H04N2201/0416 , H04N2201/0418 , H04N2201/0471 , H04N2201/04725 , H04N2201/04734 , H04N2201/04755 , H04N2201/04794
摘要： An image reading method and apparatus are capable of high-quality reading of a transparent original with an optimum light quantity by maintaining both a transmitting light source unit for emitting light for reading the transparent original and a reading scanner of an image reader for receiving the transmitted light at an adequate relative position to keep their optical axes in alignment during scan reading. Such alignment is achieved by providing synchronization in scanning speed by placing either one of the transmitting light source unit and the reading scanner at an arbitrary selected position, scanning the proximity of the selected position with the other, determining a light quantity distribution, determining a synchronous position from the distribution, carrying out such synchronous position detection at two or more distinct positions, and calculating the scanning speed ratio of the transmitting light source unit to the reading scanner from the result. Alternatively, alignment is achieved by carrying out similar synchronous position detection, determining the relative spacing between the base points of said transmitting light source and said reading scanner from the distances from the respective base points to the synchronous position, and matching the scan start positions of the transmitting light source unit and the reading scanner in accordance with the relative spacing.
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公开(公告)号：EP0509549A3
公开(公告)日：1994-06-22
申请号：EP92106799.7
申请日：1992-04-21
CPC分类号： H04N1/00737 , H04N1/00681 , H04N1/00748 , H04N1/00758 , H04N1/00766 , H04N1/4074
摘要： A scan reading method according to this invention comprises the steps of: causing a line memory to store read original image data for one line; obtaining a density average value of one-line image data or a variation rate thereof; and detecting the edge of the original by comparing the average density value or the variation rate thereof with a predetermined threshold value after finishing a scan over the original or during the scan. A scan reading method also comprises the steps of: preparing a density histogram from the one-line image data in the original region; optionally obtaining the average density value of the variation rate thereof; detecting the top end and terminal of the original from that value; and calculating highlight and shadow densities from the density histograms after finishing the scan over the original by use of a scanner. Based on the methods of the present invention, it is therefore possible to automatically detect the edge of the original and perform a density auto-measurement at low costs with a high accuracy with the aid of a small capacity line memory without adding a multiplicity of sensors and incorporating a large capacity buffer memory.
摘要翻译： 根据本发明的扫描读取方法包括以下步骤：使行存储器存储一行的读取原始图像数据; 获得一行图像数据的密度平均值或其变化率; 并且通过在完成对原稿的扫描之后或在扫描期间将平均浓度值或其变化率与预定阈值进行比较来检测原稿的边缘。 扫描读取方法还包括以下步骤：从原始区域中的单行图像数据准备密度直方图; 可选地获得其变化率的平均密度值; 从该值检测原始的顶端和终端; 并且通过使用扫描仪完成对原稿的扫描之后，从密度直方图计算高光和阴影密度。 基于本发明的方法，因此可以借助于小容量线路存储器自动检测原稿的边缘并以低成本以高精度执行密度自动测量，而不需要增加多个传感器 并结合大容量缓冲存储器。
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公开(公告)号：EP0509549A2
公开(公告)日：1992-10-21
申请号：EP92106799.7
申请日：1992-04-21
CPC分类号： H04N1/00737 , H04N1/00681 , H04N1/00748 , H04N1/00758 , H04N1/00766 , H04N1/4074
摘要： A scan reading method according to this invention comprises the steps of: causing a line memory to store read original image data for one line; obtaining a density average value of one-line image data or a variation rate thereof; and detecting the edge of the original by comparing the average density value or the variation rate thereof with a predetermined threshold value after finishing a scan over the original or during the scan. A scan reading method also comprises the steps of: preparing a density histogram from the one-line image data in the original region; optionally obtaining the average density value of the variation rate thereof; detecting the top end and terminal of the original from that value; and calculating highlight and shadow densities from the density histograms after finishing the scan over the original by use of a scanner. Based on the methods of the present invention, it is therefore possible to automatically detect the edge of the original and perform a density auto-measurement at low costs with a high accuracy with the aid of a small capacity line memory without adding a multiplicity of sensors and incorporating a large capacity buffer memory.
摘要翻译： 根据本发明的扫描读取方法包括以下步骤：使行存储器存储一条线的读取原始图像数据; 获得一行图像数据的密度平均值或其变化率; 并且在完成对原件的扫描或在扫描期间之后，通过将平均密度值或其变化率与预定阈值进行比较来检测原稿的边缘。 扫描读取方法还包括以下步骤：根据原始区域中的一行图像数据来准备密度直方图; 可选地获得其变化率的平均密度值; 从该值检测原件的顶端和终端; 并在使用扫描仪完成对原稿的扫描之后，通过密度直方图计算高光和阴影密度。 基于本发明的方法，因此可以自动检测原稿的边缘并且借助于小容量线存储器以低成本以高精度进行密度自动测量，而无需增加多个传感器 并结合大容量缓冲存储器。
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