期刊名称：International Journal of Image Processing (IJIP)
电子版ISSN：1985-2304
出版年度：2015
卷号：9
期号：2
页码：61-68
出版社：Computer Science Journals
摘要：This paper proposes a real time and energy efficient image watermarking scheme using DCT - DWT hybrid transformation. The proposed method is using a 2 - level of quantization on the Y component of true color image captured in real time and low frequency band coefficients are selected for the dataset prepared of size 256 * 10 using these coefficients, which is supplied to Extreme Learning Machine (ELM) a single layer feed forward network. A normalized column vector of size 256 * 1 is generated by ELM for its usage as key sequence for embedding the watermark. This hybrid transforms provide a better imperceptibility and reduction in the time taken by entire watermarking process i.e. within a second, makes it energy efficient and suitable for the proposed smart phone android app for a real time image watermarking.
