公开(公告)号：EP0473141A3

公开(公告)日：1993-02-10

申请号：EP91114461.6

申请日：1991-08-28

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Hanyu, Gosuke ,  Nakauchi, Kenji ,  Tsuzuki, Masayuki

IPC分类号： H04N1/00

CPC分类号： H04N1/00015 ,  H04N1/00002 ,  H04N1/00037 ,  H04N1/00047 ,  H04N1/00058 ,  H04N1/00408 ,  H04N1/00485 ,  H04N1/40062

摘要： 5 n 7 The film and the PS plate are read in separately by a scanner to recognize the positional shift therebetween. Based on the quantity of the recognized positional shift, the alignment in position is conducted between the pair of image information. For the alignment in position, the address conversion is applied most preferably as the method. Both the images are compared in such a condition as being aligned in position, and the comparisons are made one by one for fixed regions. The whole image is divided into a plurality of images having a fixed area. Next to this, for each divided region, a judgement is made on whether each divided region is formed of halftoned portion or text. As a result, if a divided portion is determined to be a text, a fixed threshold level for binarizing is set up. When a divided portion is judged as a halftoned portion, a threshold level is set up, what is called dynamically, in accordance with variations of the halftone dot densities. Then, based on the set-up threshold levels, each portion is binarized. After these binarizing operations, all regions of the film divided are respectively compared with the corresponding regions of the PS plate to detect any mismatched portions. It is most preferable to compare the numbers of black (or white) dots since this method agrees with the human's sensation. As a result of the disagreement detection, a judgement is made on whether or not each divided portion disagrees with the corresponding portion more largely than a certain level, if it is so, the region in question is determined as a mismatched one and the error information is set up.

公开(公告)号：EP0473141A2

公开(公告)日：1992-03-04

申请号：EP91114461.6

申请日：1991-08-28

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Hanyu, Gosuke ,  Nakauchi, Kenji ,  Tsuzuki, Masayuki

IPC分类号： H04N1/00

CPC分类号： H04N1/00015 ,  H04N1/00002 ,  H04N1/00037 ,  H04N1/00047 ,  H04N1/00058 ,  H04N1/00408 ,  H04N1/00485 ,  H04N1/40062

摘要： 5 n 7 The film and the PS plate are read in separately by a scanner to recognize the positional shift therebetween. Based on the quantity of the recognized positional shift, the alignment in position is conducted between the pair of image information. For the alignment in position, the address conversion is applied most preferably as the method. Both the images are compared in such a condition as being aligned in position, and the comparisons are made one by one for fixed regions. The whole image is divided into a plurality of images having a fixed area. Next to this, for each divided region, a judgement is made on whether each divided region is formed of halftoned portion or text. As a result, if a divided portion is determined to be a text, a fixed threshold level for binarizing is set up. When a divided portion is judged as a halftoned portion, a threshold level is set up, what is called dynamically, in accordance with variations of the halftone dot densities. Then, based on the set-up threshold levels, each portion is binarized. After these binarizing operations, all regions of the film divided are respectively compared with the corresponding regions of the PS plate to detect any mismatched portions. It is most preferable to compare the numbers of black (or white) dots since this method agrees with the human's sensation. As a result of the disagreement detection, a judgement is made on whether or not each divided portion disagrees with the corresponding portion more largely than a certain level, if it is so, the region in question is determined as a mismatched one and the error information is set up.

摘要翻译： 通过扫描仪单独读取胶片和PS版，以识别它们之间的位置偏移。 基于所识别的位置偏移的量，在一对图像信息之间进行位置对准。 对于位置的对准，最优选地应用地址转换作为该方法。 在将图像对准的状态下进行比较，对于固定区域进行比较。 整个图像被分成具有固定区域的多个图像。 接下来，对于每个分割区域，判断每个分割区域是否由半色调部分或文本形成。 结果，如果分割部分被确定为文本，则建立用于二值化的固定阈值级别。 当分割部分被判断为半色调部分时，根据半色调点密度的变化，建立阈值水平，即所谓的动态的。 然后，基于设置阈值级别，将每个部分二进制化。 在这些二值化操作之后，将所分割的胶片的所有区域分别与PS板的相应区域进行比较，以检测任何不匹配的部分。 最好比较黑色（或白色）点的数量，因为这种方法与人的感觉一致。 作为不一致检测的结果，判断每个分割部分是否比相应部分更大程度上不同于一定水平，如果是，则将所述区域确定为不匹配的区域，并且错误信息 成立了