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Interactive Displays: Natural Human-Interface Technologies by Achintya Bhowmik

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Chapter 4Visual Sensing and Gesture Interactions

Achintya K. Bhowmik

Intel Corporation, USA

4.1 Introduction

Vision plays the dominant role in our interactions with the physical world. While all our perceptual sensing and processing capabilities, such as touch, speech, hearing, smell, and taste, are important contributors as we the humans understand and navigate in our daily lives, the visual perception process involving the sensing and understanding of the world around us based on the optical information received and analysed by the human visual system is the most important and utilized. There is a good reason why we have evolved to predominantly use the daytime for activities and rest after the sun goes down. Fittingly, significant portions of our brain are dedicated to processing and comprehending visual information.

Visual displays are already the primary human interfaces to most of the electronic devices that we use in our daily lives for computing, communications, entertainment, etc., presenting the system output and responses in the form of visual information to the user. Manipulating and interacting with the visual content on the display remains an intense field of research and development, generally referred to in the published literature as human-computer interaction or human-machine interface.

As reviewed in Chapter 1, the early commercially successful means of human interaction with displays and systems included indirect methods using external devices such as television ...

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