Method, software, and device for hiding data in binary image, while preserving image quality

Abstract

A method of embedding watermark data into a two-colour (binary) image includes dividing the image into blocks and assessing the suitability of each block to embed a bit of watermark data by assessing whether or not the flipping of a defined pixel in each block affects the visual attributes of said block in manner to be perceptible by the human eye. Data is only embedded in those blocks determined to be suitable for data embedding, by flipping the defined pixel, as required. A recipient of the document may similarly assess which blocks contain watermark data, by assessing the suitability of each block in the document to embed such data. Conveniently, watermark data may be extracted without further information about the data’s location within a document.

Haiping Lu

Director of the UK Open Multimodal AI Network, Professor of Machine Learning, and Head of AI Research Engineering

I am a Professor of Machine Learning. I develop translational multimodal AI technologies for advancing healthcare and scientific discovery.