Research of halftone watermark detection technology based on mobile platform

摘要

In order to achieve portable detection for halftone watermark, this paper indicates a halftone watermark detection technology based on the mobile platform. In a screening image print, halftone watermark can be hidden by using dot characteristics, and the watermark also can be extracted according to the dot characteristics. On the mobile platform with Android OS, the halftone watermark can be detected by using android-JNI technology. The core of android-JNI is NDK compile which consists of 3 steps. First, configuring the NDK compile environment, and then editing the C/CPP source file and mk file, and finally, through NDK compiling, convert the image processing program, edit the library file using C/C++,which can be called in a android project. Experimental results show that the halftone watermark detection can be realized on the mobile platform with Android OS.