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1. 发明公开

EP0400490A2 Flat bed scanning type image reader 失效
标题翻译： Bildlesevorrichtung vom Flachbettabtastungstyp。
公开(公告)号：EP0400490A2
公开(公告)日：1990-12-05
申请号：EP90109924.2
申请日：1990-05-25
申请人： Dainippon Screen Mfg. Co., Ltd.
发明人： Kishida, Yoshihiro, Dainippon Screen Mfg. Co. Ltd.
IPC分类号： H04N1/387 , H04N1/10
CPC分类号： H04N1/1008 , H04N1/3875
摘要： An apparatus for reading an image by using a CCD line sensor (18), including a half mirror (19) or the like disposed on an optical path extending from an input optical system to the CCD line sensor, and a linear light source (22) disposed on an optical path branched out by the half mirror. The linear light source is located at a position equivalent to the CCD line sensor with respect to a document table (11), and is equal in length to an effective pixel region of the CCD line sensor. Light emitted from the light source is projected back to the document table. An effective image reading area is displayed on the document table by relatively moving the document table and linear projected image in a sub-scanning direction.
The linear light source is rotatable in accordance with a setting angle of an original. Consequently, an inclined image is projected back to the document table to serve as a guideline for setting the original.
Where a spot light source is substituted for the linear light source, a spot image projected back to the document table is moved along a trimming area of an original. The trimming area is automatically determined by detecting distances of movement of the spot image.
摘要翻译：一种用于通过使用CCD线传感器（18）读取图像的装置，包括设置在从输入光学系统延伸到CCD线传感器的光路上的半反射镜（19）等，以及线性光源（22））设置在由半反射镜分支的光路上。线性光源相对于文件台（11）位于与CCD线传感器相当的位置，并且与CCD线传感器的有效像素区域的长度相等。从光源发射的光被投射回到文件台。通过在副扫描方向上相对移动原稿台和线性投影图像，在文件台上显示有效的图像读取区域。线性光源可以根据原稿的设定角度旋转。因此，将倾斜图像投影回到文件台，以作为设置原稿的准则。在点光源代替线性光源的场合，投射回文件台的斑点图像沿原稿的修整区域移动。通过检测点图像的移动距离来自动确定修剪区域。

2. 发明公开

EP0400490A3 Flat bed scanning type image reader 失效
标题翻译：平板扫描型图像读取器
公开(公告)号：EP0400490A3
公开(公告)日：1991-11-21
申请号：EP90109924.2
申请日：1990-05-25
申请人： Dainippon Screen Mfg. Co., Ltd.
发明人： Kishida, Yoshihiro, Dainippon Screen Mfg. Co. Ltd.
IPC分类号： H04N1/387 , H04N1/10
CPC分类号： H04N1/1008 , H04N1/3875
摘要： An apparatus for reading an image by using a CCD line sensor (18), including a half mirror (19) or the like disposed on an optical path extending from an input optical system to the CCD line sensor, and a linear light source (22) disposed on an optical path branched out by the half mirror. The linear light source is located at a position equivalent to the CCD line sensor with respect to a document table (11), and is equal in length to an effective pixel region of the CCD line sensor. Light emitted from the light source is projected back to the document table. An effective image reading area is displayed on the document table by relatively moving the document table and linear projected image in a sub-scanning direction. The linear light source is rotatable in accordance with a setting angle of an original. Consequently, an inclined image is projected back to the document table to serve as a guideline for setting the original. Where a spot light source is substituted for the linear light source, a spot image projected back to the document table is moved along a trimming area of an original. The trimming area is automatically determined by detecting distances of movement of the spot image.

3. 发明公开

EP0424920A3 Method of and apparatus for obtaining tone curve 失效
标题翻译：用于获取音调曲线的方法和装置
公开(公告)号：EP0424920A3
公开(公告)日：1992-04-08
申请号：EP90120425.5
申请日：1990-10-24
申请人： Dainippon Screen Mfg. Co., Ltd.
发明人： Kishida, Yoshihiro, Dainippon Screen Mfg. Co. Ltd.
IPC分类号： H04N1/40
CPC分类号： H04N1/4072
摘要： A plurality of reference tone curves are previously determined. An operator divides an original image into image regions and selects respective reference tone curves (f₁(x), f₂(x)) for the image regions. The operator designates weight values (w₁,w₂) for the respective reference tone curves. A weighted average of the respective reference tone values is calculated with the weight values to obtain a tone curve (fd(x)) employed for converting the gradation of the original image.

4. 发明授权

EP0400490B1 Flat bed scanning type image reader 失效
标题翻译： Bildlesevorrichtung从Flachbettabtastungstyp。
公开(公告)号：EP0400490B1
公开(公告)日：1995-06-28
申请号：EP90109924.2
申请日：1990-05-25
申请人： Dainippon Screen Mfg. Co., Ltd.
发明人： Kishida, Yoshihiro, Dainippon Screen Mfg. Co. Ltd.
IPC分类号： H04N1/387 , H04N1/10
CPC分类号： H04N1/1008 , H04N1/3875

5. 发明授权

EP0424920B1 Method of and apparatus for obtaining tone curve 失效
标题翻译：用于生成色调曲线的方法和装置
公开(公告)号：EP0424920B1
公开(公告)日：1995-12-13
申请号：EP90120425.5
申请日：1990-10-24
申请人： Dainippon Screen Mfg. Co., Ltd.
发明人： Kishida, Yoshihiro, Dainippon Screen Mfg. Co. Ltd.
IPC分类号： H04N1/40
CPC分类号： H04N1/4072

6. 发明公开

EP0424920A2 Method of and apparatus for obtaining tone curve 失效
标题翻译： Verfahren und Vorrichtung zur Erhaltung von Tonkurven。
公开(公告)号：EP0424920A2
公开(公告)日：1991-05-02
申请号：EP90120425.5
申请日：1990-10-24
申请人： Dainippon Screen Mfg. Co., Ltd.
发明人： Kishida, Yoshihiro, Dainippon Screen Mfg. Co. Ltd.
IPC分类号： H04N1/40
CPC分类号： H04N1/4072
摘要： A plurality of reference tone curves are previously determined. An operator divides an original image into image regions and selects respective reference tone curves (f₁(x), f₂(x)) for the image regions. The operator designates weight values (w₁,w₂) for the respective reference tone curves. A weighted average of the respective reference tone values is calculated with the weight values to obtain a tone curve (fd(x)) employed for converting the gradation of the original image.
摘要翻译：预先确定多个参考色调曲线。操作者将原始图像划分为图像区域，并为图像区域选择各个参考色调曲线（f1（x），f2（x））。操作员为相应的参考色调曲线指定权重值（w1，w2）。使用权重值计算各个参考色调值的加权平均值，以获得用于转换原始图像的灰度的色调曲线（fd（x））。

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