Research And Implementation Of Hidden Digital Watermarking Technology Based On Android

With the development of the Internet and the popularization of electronic products,mobile phones become more and more important,and people like to use mobile phone take photos in order to share with friends and record their lives.The rapid spread of pictures,making the photo of real-time information and copyright information is more and more important.Therefore,how to obtain the real-time and copyright information of the picture becomes the urgent problem to be solved at present.At the same time,the performance of PC(Personal Computer)is much better than mobile phone,hidding digital watermark based on mobile phone is not so convenient,But the use of mobile phone is far widly.At present,the mobile phone mainly protects the owner's copyright by embedding visible watermark,with destroying the structure of the original image,Also there is little APP(Application)embeds real-time information.This article mainly studies and realizes the hidden digital watermark technology based on Android,the main work includes:(1)Firstly,we introduce the digital watermarking technology briefly,include its classification,attack methods,application and the main digital watermarking algorithms of digital watermarking.Then the discrete wavelet transform digital watermarking technology and the techonology on picture is described in detail.The DWT(Discrete Wavelet Transform)technology embeds and extracts watermark information into color pictures,and performs some attacks on the carrier image to extract watermarks to test its robustness.(2)Combined with Android programming,the color image of Android terminal is processed,the original image is preprocessed using discrete wavelet transform,and the real-time geographic location information is obtained by using Baidu map positioning.The watermark picture is generated by combining mobile phone IMEI(International Mobile Equipment Identity),Android ID and other mobile phone information and user information,Then the watermark picture is embedded into the original color image through invisible technology to generate a carrier picture with copyright and real-time information.At the same time,the watermark information can also be extracted through the corresponding method.Finally,this article is summarized,and the further development of the system is proposed.