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Joceli Mayer

Universidade Federal de Santa Catarina

Dr. Joceli Mayer graduated in electrical engineering from the Universidade Federal de Santa Catarina (UFSC), Brazil, in 1998. He received a master\'s degree in Electrical Engineering from UFSC in 1991, and a master’s degree in Computer Engineering and a DPhil from the University of California at Santa Cruz (UCSC), USA, in 1998 and 1999, respectively. He received the Best Student Paper Award from the IEEE International Conference on Image Processing and IBM in 2006 and became an IEEE senior member in 2012. Currently, Dr. Mayer is a Full Professor of Electrical Engineering at UFSC. He has published more than 100 articles in conferences and periodicals, authored two books and two chapters, and advised undergraduate and graduate students on research projects. He has developed and supervised projects on super-resolution, speech compression, VOIP systems, image processing, digital watermarking, hardcopy document authentication, and assistive technology applications for hearing, speech, and mobility-disabled people with the Internet of Things and speech recognition technologies. His research has been supported by industry and government agencies including FINEP, CNPq, Hewlett Packard, and Intelbras, among others.

2chapters authored

Chapters authored

Optimization of Multibit Watermarking

By Joceli Mayer

Part of the book: Watermarking

Review on Watermarking Techniques Aiming Authentication of Digital Image Artistic Works Minted as NFTs into Blockchains

By Joceli Mayer

The recent creation of Non Fungible Tokens (NFTs) has enabled a multibillionaire market for digital artistic works including images or sequence of images, videos, and animated gifs. With this new trend issues regarding fraud, stolen works, authenticity, and copyright came along. The goal of this chapter is to provide an overview of the watermarking techniques that can be employed to mitigate those issues. We will discuss transparency, robustness, and payload of watermarking techniques aiming to educate the artists, researchers, and developers about the many approaches that watermarking techniques provide and the resulting trade-offs. We focus on fragile watermarking techniques due to their high transparency for embedding into artistic works. We discuss the spread spectrum and Least Significant Bit techniques. We describe the usual process of NFT minting into a blockchain and propose a more secure certification protocol with watermarking which employs the same usual NFT minting offered by current marketplaces. The proposed certification protocol mints a checksum string into a blockchain, ensuring the validity of the watermark and the information embedded into this watermark. This proposed protocol validates the date of creation and author identification which are transparently embedded in the artistic work, thus, increasing the security and confidence of markets for artistic works transactions.

Part of the book: Information Security and Privacy in the Digital World

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Dalila Goudia

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