Mahesh Sanghavi

Work place: JNU Rajasthan



Research Interests: Computer Architecture and Organization, Image Processing, Data Compression, Data Structures and Algorithms


Mahesh Sanghavi has secured his BE from University of Pune and ME in Computer Science and Engineering from SRTM University Nanded. Currently he is pursuing PhD from Faculty of Engineering & Technology, Jodhpur National University, and Rajasthan. He has teaching experience of ten years in the field of computer engineering. He has published various papers in International Conferences & Journals. His research interests include Image processing and digital data security.

Author Articles
VisiMark1_0: An Assistance Tool for Evaluating Robustness of Video Watermarking Algorithms

By Neeta Deshpande Mahesh Sanghavi Archana Rajurkar Ramchandra Manthalkar

DOI:, Pub. Date: 8 Apr. 2013

The paper proposes a tool, VisiMark1_0, as assistance for evaluating the robustness of video watermarking algorithms as evaluation of a video watermarking algorithm for robustness with available tools is a tedious task. It is our belief that for researchers of robust video watermarking, a tool needs to be designed that will assist in the evaluation procedure irrespective of the design algorithm.
This tool provides a test bed of various attacks. The input to this tool will be a watermarked video whereas the outputs will be attacked videos, evaluated parameters PSNR, MSE, MSAD and DELTA, graphical comparisons of the attacked and watermarked videos with all parameters needed by researchers, and the attacks report. Provision for comparison of any two videos is an additional facility provided in the tool.
The attacks implemented in VisiMark1_0 are categorized mainly in three. Firstly, Video attacks: Frame dropping, Frame averaging, Frame swapping, Changing the sequence of the scenes, Changing Frame rate, Fade and dissolve, Contrast stretching, Motion blurring, Chroma sampling, Inter frame averaging are some of the novel offerings in video frame attacks category. Secondly, Geometrical attacks: Apart from the traditional Rotation, Scaling and Cropping attacks for images, VisiMark1_0 contributed towards Sharpening, Shearing, Flipping, Up/down sampling and Dithering attacks for a video and signal processing attacks like Conventional Noising, Denoising and Filtering attacks for images are incorporated for video along with Pixel removal attack as a novel contribution. VisiMark1_0 is an endeavor to design a tool for evaluating a raw video (an .avi file currently) incorporating various attacks having a prospect for numerous video formats in near future.

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