数字相机检定场测标的自动识别技术

Automatic Identification Technique of Marks of Digital Camera in Standard Field

测标匹配的准确性是利用检定场检定数字相机的前提。针对灰度绝对值和匹配方法存在的问题,选用基于相关系数的匹配方法对测标进行匹配。为了加快匹配速度,提出采用Alpha通道置0的图像预处理办法对算法进行了改进,实验表明,该方法克服了灰度绝对值和匹配方法存在的亮度影响,可以快速准确识别测标,并对其算法做了精度测定。

The precision of marks was the base of verifying digital camera . In the paper, the method of imagematching based on correlation coefficient was selected , pointing to the problem of the method basing on the sum of gray absolute value. To accelerating image-matching , the method of null the Alpha channel of image preprocessing was used, which improving the algorithm. The experiments showed that it could well solute the problem, identifying the mark rapidly and accurately , and checked the precious of the algorithm.