公开(公告)号：US20090263027A1

公开(公告)日：2009-10-22

申请号：US12491979

申请日：2009-06-25

申请人： Hiroshi ABE ,  Makoto YAZAWA ,  Kenichi ICHIKAWA

发明人： Hiroshi ABE ,  Makoto YAZAWA ,  Kenichi ICHIKAWA

IPC分类号： G06K9/68

CPC分类号： G06K9/6203 ,  G06K9/6202

摘要： In an image processing method, extraction points are set inside the draw line as the region with less luminance change relative to the periphery, and extraction points are set on the background outside the draw line in a sample image such as a letter and a number. Pixel data of the extraction points are used to obtain the normalization correlation coefficient with respect to the target image in the determination region. As the template data are generated using pixel data of two groups of the extraction points with clear contrast in the luminance difference therebetween, the true image to be determined as being the same as the template image is detected accurately through the calculation for a short period of time.

摘要翻译： 在图像处理方法中，将提取点设置在绘制线内部，作为相对于周边的亮度变化较小的区域，并且将提取点设置在诸如字母和数字的样本图像中的绘制线外部的背景上。 使用提取点的像素数据来获得相对于确定区域中的目标图像的归一化相关系数。 由于使用两组提取点的像素数据生成模板数据，所以在其间的亮度差异方面具有清晰的对比度，因此通过计算短时间段来准确地检测与模板图像相同的真实图像 时间。