公开(公告)号：US06332574B1

公开(公告)日：2001-12-25

申请号：US09438847

申请日：1999-11-12

申请人： Hisashi Shigekusa ,  Masami Tanaka ,  Tadao Oshima

发明人： Hisashi Shigekusa ,  Masami Tanaka ,  Tadao Oshima

IPC分类号： G06K504

CPC分类号： G06K7/1092 ,  G06K7/10722 ,  G06K7/1093 ,  G06K7/14 ,  G06K7/1443 ,  G06K7/1491

摘要： A method of reading a bar code having guard bars at both sides thereof without fail even if the bar code image is highly distorted. An image region taken in by a CCD camera is scanned in horizontal and/or vertical directions to find out a first guard bar in the bar code. Then, a first scanning line for reading the bar code is set in a direction perpendicular to the first guard bar. The bar code is scanned along the first scanning line. If the first scanning line goes out of the bar code region, the first scanning line is traced back to a bar which is last read. Another scanning line starting from the last read bar and extending perpendicularly thereto is set to read the rest of the bar code. This process is repeated until the second guard bar is detected and a whole bar code is completely read. The first scanning line may be set, so that it only reads a predetermined number of bars and the rest of the bar code is read by new scanning lines starting from the last read bar. Alternatively, the bar code region is searched by preliminarily scanning the image region divided into plural rectangular sections. The bar code region is determined based on the number of brightness changes in each divided section. The first guard bar in the bar code can be easily found in this manner.

摘要翻译： 即使条形码图像高度失真，也不会失败地读取其两侧具有保护条的条形码的方法。 通过CCD摄像机拍摄的图像区域在水平和/或垂直方向上扫描，以便在条形码中找到第一保护条。 然后，在与第一保护条垂直的方向上设置用于读取条形码的第一扫描线。 沿着第一条扫描线扫描条形码。 如果第一条扫描线超出条形码区域，则第一条扫描线将被追溯到最后读取的条形。 从最后一个读取条开始并垂直延伸的另一个扫描线被设置为读取条形码的其余部分。 重复该过程，直到检测到第二保护条，并且完全读取整个条形码。 可以设置第一扫描线，使得其仅读取预定数量的条，并且从最后读取条开始，通过新的扫描线读取其余条形码。 或者，通过预先扫描分割成多个矩形部分的图像区域来搜索条形码区域。 根据每个划分的部分中的亮度变化的数量来确定条形码区域。 条形码中的第一个保护条可以轻松地以这种方式找到。

公开(公告)号：US4818847A

公开(公告)日：1989-04-04

申请号：US517745

申请日：1983-07-27

申请人： Masahiro Hara ,  Atutoshi Okamoto ,  Toshiyasu Sakai ,  Tadao Oshima ,  Hiroshi Yamamoto ,  Hiromitsu Takai

发明人： Masahiro Hara ,  Atutoshi Okamoto ,  Toshiyasu Sakai ,  Tadao Oshima ,  Hiroshi Yamamoto ,  Hiromitsu Takai

IPC分类号： G06K7/10 ,  G06K7/12

CPC分类号： G06K7/10881 ,  G06K7/12

摘要： Apparatus for optically reading printed information by radiating light onto printed information to be reflected thereby, receiving the reflected light through an optical system and converting the image of the reflected light into a corresponding electric signal. The light source employs red light emitting diodes which radiate highly bright red light having a wavelength peak at about 660 nm so that the image sensor can receive a highly contrasting reflected light from the information printed in black on a white base. The light source further or alternatively employs infrared light emitting diodes for radiating the light having a peak wavelength at about 925 nm so that the image sensor can also received a highly contrasting reflected light from information printed in black on a blue or green base.

摘要翻译： 用于通过将光照射到要被反射的打印信息上来光学读取印刷信息的装置，通过光学系统接收反射光并将反射光的图像转换成相应的电信号。 光源采用红色发光二极管，其辐射具有约660nm波长峰值的高亮度红光，使得图像传感器可以接收来自在白色基底上以黑色印刷的信息的高度对比的反射光。 光源进一步或替代地使用红外发光二极管来发射具有约925nm的峰值波长的光，使得图像传感器还可以从蓝色或绿色基底上以黑色印刷的信息中接收高度对比的反射光。

公开(公告)号：US5489770A

公开(公告)日：1996-02-06

申请号：US207150

申请日：1994-03-08

申请人： Toshiyuki Kadota ,  Yasushi Iwade ,  Tadao Oshima

发明人： Toshiyuki Kadota ,  Yasushi Iwade ,  Tadao Oshima

IPC分类号： G06K7/10

CPC分类号： G06K7/10881

摘要： In an optical information reading apparatus in which the degree of freedom with which the apparatus is shaped is improved, a mirror for bending a reflected light which has passed through an image forming lens is disposed between the image forming lens and an image sensor, whereby the provision of the image sensor at a position which is not on a line extending between the image forming lens and the mirror is enabled. That is, a space located beyond the line extending between the image forming lens and the mirror can be freely altered, thus increasing the degree of freedom with which a casing is shaped.

摘要翻译： 在改善了设备自由度的光学信息读取装置中，在图像形成透镜和图像传感器之间设置用于弯曲穿过成像透镜的反射光的反射镜，由此， 能够在不在图像形成透镜和反射镜之间延伸的线上的位置设置图像传感器。 也就是说，在图像形成透镜和反射镜之间延伸的线之外的空间可以自由地改变，从而增加了壳体成形的自由度。