6. Method 1 Each device has an acrylic or glass surface A finger touches the surface causing light to scatter The reflection is picked up by sensors or cameras The gesture is sent as data to software The software interprets the data and initiates the appropriate response
7. Method 2 A pressure-sensitive coating is applied to the screen surface The coating flexes under varying pressure of the touch Sensors interpret the pressure The data is sent to software which relays the appropriate response
8. Method 3 Handheld devices have panels that carry an electrical charge The touch disrupts the electrical field The disruption is registered and sent to the software The software interprets the gesture and initiates the appropriate response
9. But this isn’t new technology There were important breakthroughs beginning in 1953
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11. He invented the touch sensitive keyboard collectionscanada.gc.ca
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13. MIT wrote the first video game, Space War! for it.
15. Each had a cathode ray tube graphic display.library.thinkquest.org
16. Then the work began to improve Computer-Human Interaction www2.cit.cornell.edu insitebuilders.blogspot.com xmission.com
17. In 1963, Ivan Sutherland invented SketchPad. Objects were manipulated directly on the computer screen using a light-pen. jabberwockydesign.com jabberwockydesign.com
21. Individual drawings were recognized as objects(This was an important step toward later programming) 1. http://www.newmediareader.com/cd_samples/Kay/index.html
31. In 1992,computers became mobile The Apple Newton: The first PDA (Personal Digital Assistant) This brought together many previous technological innovations Pen Computing Technology Handwriting Recognition Software Gesture Recognition It also introduced Apple’s 1sttablet platform. (Apple’s 2ndplatform is used in the iPhone, iPod Touch, and iPad.) gdgt.com
32. These innovations and breakthroughs allow us to interact with our devices using Natural Human Gestures: Touches, Swipes and Taps