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CN1542682A 钞票样张印刷误差的测定方法 无效 - 撤回

钞票样张印刷误差的测定方法
摘要：
本发明涉及一种钞票样张印刷误差的测定方法，属印刷技术领域。本方法首先对钞票标准图案进行扫描，得到标准图案的标准数字图像；对待测的钞票样张进行扫描，得到待测样张的数字图像；在待测样张的数字图像上选择多个色彩变化剧烈的特征块，求出该特征块与标准图像相应位置上特征块之间的相对位移；根据上述相对位移，移动待测图像，使待测图像与标准图像对准；将二个图像上的所有对应象素点的色度相减，得到二者色度上的误差值。本发明的方法，能够定量、客观地评价待测样张的印刷质量，省时、省力，避免了人为因素的干扰。而且使用本方法检测，所需设备都是成熟的技术和产品，检测设备易于购置、操作和维护。
摘要（英）：

The present invention is banknote sample printing error measuring method and belongs to the field of printing technology. The method includes the first scanning the standard banknote pattern to obtain the standard digital image of standard pattern, scanning the banknote sample to be measured to obtain the digital image of the sample, selecting characteristic blocks in the digital image of the sample with abrupt color change and finding out the relative offset between each characteristic block and corresponding standard image position, shifting the image to be measured based on the relative offset to align the image to be measured and the standard image, and subtracting the chroma of all the corresponding pixels in these two images to obtain the chroma error. The said method can evaluate the print quality of the sample to be measured quantitatively and objectively.

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