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Hand Geometry

Hand Geometry. By: Kieran Hepworth. Table of Contents. Definition...................................Slide 3 How it Works.............................Slides 4 – 6 Equipment.................................Slide 7 Pros...........................................Slide 8

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Hand Geometry

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  1. Hand Geometry By: Kieran Hepworth

  2. Table of Contents • Definition...................................Slide 3 • How it Works.............................Slides 4 – 6 • Equipment.................................Slide 7 • Pros...........................................Slide 8 • Cons..........................................Slide 9 • Use of Hand Geometry..............Slide 10 • Video…......................................Slide 11

  3. Definition • Hand geometry-a biometric that identifies users by the shape of their hands. • It uses the measurements of the hand in order to determine if the hand is a match or not. • Can use finger length, thickness, and curvature. • Only for the purposes of verification, not identification.

  4. How it Works • In a broad sense, hand geometry readers measure a user's hand along many dimensions and compare those measurements to measurements stored in a file. • This is done by using a series of algorithms to determine the measurements of the hand.

  5. How it Works (cont’d) • Assuming that there is already images of the hand on file, these are the steps taken in hand geometry • Step 1: Hand is placed on plate with hand in right position between 6 pins and an image is taken • Step 2: A median filter is applied to the image • Step 3: Necessary features for comparison are extracted

  6. How it Works (cont’d) • Step 4: Difference between sample and template is calculated for each feature • Step 5: Person with smallest “absolute difference” in feature is identified • Step 6: Step 5 is repeated for all 5 features • Step 7: Person with largest number of features is identified as a match • Step 8: Results are displayed

  7. Equipment • Scanner • Pins • Screen • Punch keys (if desired) • Swipe (if desired)

  8. Pros • Requires little memory • Less invasion of privacy (people more comfortable with system) • Can easily be coupled with other systems for identification

  9. Cons • Not distinctive • Can only be used for verification • Many hands are very similar in shape and size, system may confuse someone else’s hand for yours • Would have to be combined with another system in order for complete identification • System can be very expensive • Training required

  10. Use of Hand Geometry • Hand geometry is widely used throughout the world • It is used for verification, not identification • The hand geometry system is coupled with ID scanning to verify who is entering • It is not widely used in airports but has been taken advantage of by different companies for their buildings and even government agencies

  11. Video • http://video.search.yahoo.com/video/play?n=21&ei=utf-8&vm=r&fr=yfp-t-701&fr2=sg-gac&tnr=21&sado=1&p=hand+geometry+scanning&vid=854492315917&dt=30140788&l=82&turl=http%3A%2F%2Fts2.mm.bing.net%2Fvideos%2Fthumbnail.aspx%3Fq%3D854492315917%26id%3D9c2625c10b3f1100369f98552b5d1c57%26bid%3D5Ur45UyVE%252bSAgA%26bn%3DThumb%26url%3Dhttp%253a%252f%252fwww.inceptiontechnologies.com%252fVideos%252fhandreader.wmv&rurl=http%3A%2F%2Fwww.inceptiontechnologies.com%2FQSR%2520Page%2FQSR.html&tit=Inception++Technologies++-+Quick++Service++Restaura...&sigr=11oe87ept&newfp=1

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