This thesis's background is an online system of detecting printed image. The concrete process includes the following steps: printed image's preprocess, image feature extraction and matching. Through the above processing to get the unqualified printed image. This article has mainly done the following work:
a) In the feature extraction stage, the Forstner, Harris, SIFT (Scale Invariant Feature Transform) three kinds of feature extraction operators are used on the printed image detection, and contr...