1 / 17

Face Recognition

Face Recognition. History, Technology, Impact and Research. Outline. What is Face recognition? Brief History of the approaches and techniques Where and how is it used today? Current state-of-the-art and ongoing research Social and moral implications. A Hard Problem.

ponce
Download Presentation

Face Recognition

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Face Recognition History, Technology, Impact and Research

  2. Outline • What is Face recognition? • Brief History of the approaches and techniques • Where and how is it used today? • Current state-of-the-art and ongoing research • Social and moral implications

  3. A Hard Problem • Humans (and non-human primates) are really good at face recognition and many other forms of pattern recognition – handwriting, speech, abstract illustrations. These skills probably helped us survive in the face of predators, identify close family members, and analyze facial expressions • Human infants possess this sophisticated skill at very early stages of development • But because of the complexity of the problem, computer algorithms that can perform face recognition have only been developed fairly recently

  4. Face Detection vs. Face Recognition • Face detection is the first step – using a technology to locate a human face in a complex image that contains noise and distracting objects, and a face that might have a variety of orientations, illuminations, partial obstructions, etc. How many faces are there in this picture? (at least 13, maybe more….) Retrieved 2/1/11 from http://www.mindfake.com/illusion_3.html

  5. Face Detection • The technology is now very common – many consumer cameras have face detection built in to facilitate focus on a person; Google, Flickr, Facebook and many other web sites perform face detection (and even the next step, recognition) on images. • The algorithms employ a variety of methods, including pattern matching, identifying particular facial characteristics, and even looking for areas of skin tones Downloaded 2/1/11 from http://www.neurotechnology.com/verilook-technology.html

  6. I’ve detected a face, how do I recognize it? • Start by storing one or more images of the face that will need to be subsequently recognized. These images are processed in a way that will allow the recognition algorithm to compare the features of the target image to the stored image(s) • Starting in the 1960s, some procedures were developed that were semi-automated, it required an operator to manipulate the image so that a computer algorithm could process it successfully.

  7. Algorithms Geometry-based methods – compare distances and other geometric features on the detected face with those of the stored image, an try to identify the closest match Direct Correlation Methods – Compare the detected face with the stored images, and find one with the closest match by statistically comparing color and other dimensions pixel by pixel Many other complex mathematical approaches are also used Retrieved 2/1/11 from http://www.mathworks.com/matlabcentral/fx_files/16760/1/face_recognition.jpg

  8. Uses: Surveillance Large populations and public areas can be surveyed and persons of interest (suspected terrorists, missing children, etc.) could be automatically identified. Retrieved 2/1/11 from http://theideaslab.files.wordpress.com/2008/09/surveillance-cartoon.jpg

  9. Uses: Secure Login and Access Many computer systems, including Windows 7, now enable secure login through face recognition; this supplements traditional methods such as passwords and fingerprint swipes and is potentially more secure Retrieved 2/1/11 from http://www.windows7download.com/win7-luxand-blink-face-recognition/screenshot-yjsynopf.html

  10. Uses: Face Recognition in Consumer Applications Face recognition is now used in many consumer photo applications – Flickr, Picasa, Facebook, and desktop photo organization software. Retrieved 2/1/11 from http://www.labnol.org/software/windows-live-photo-gallery-facial-recognition/3966/

  11. Advantages of Face Recognition As a security technology it is less intrusive than other biometric techniques – it requires no physical contact or even cooperation from the subject Retrieved 2/1/11 from http://ccit205.wikispaces.com/file/view/biometrics-security.gif/30069899/biometrics-security.gif

  12. Challenges to Face Recognition Face recognition suffers from several deficiencies. It can be easily circumvented in security situations by a disguise. It also depends heavily on the quality of the captured image, and therefore is very subject to illumination in uncontrolled environments Retrieved 2/1/11 from http://www.codeproject.com/KB/recipes/normalisation_algorithms.aspx

  13. How about people that look very similar, e.g. twins, or corporate executives? Retrieved 2/1/11 from http://fingerchip.pagesperso-orange.fr/biometrics/types/face.htm

  14. Face Recognition and Biometrics Because facial recognition on its own might not be sufficiently reliable for some applications (e.g. it can easily be circumvented by disguises), it can be supplemented by other biometric techniques such as fingerprints, retinal scans, voice analysis, etc. Retrieved 2/1/11 from http://commons.wikimedia.org/wiki/File:Biometric.jpg Attribution: By Welleman (Own work) [CC-BY-2.5 (www.creativecommons.org/licenses/by/2.5), via Wikimedia Commons

  15. Face Recognition: Future Opportunities Face recognition algorithms are being expanded to identify features that correlate with various psychological states and emotions. Is there any validity to TV’s “Lie to Me” ? Retrieved 2/1/11 from http://www.dcviews.com/press/Face-detection.htm Retrieved 2/1/11 fromhttp://www.sheknows.com/love-and-sex/articles/808147/signs-hes-lying

  16. Social, Moral and Legal Implications • Because facial recognition can be performed without any awareness by the subject, does this constitute an invasion of privacy or personal freedom? • What are the consequences if we biometrically identify a complete population? Perhaps this is already being done, since in many populations government agencies already have photographs of all individuals (via passports, drivers licenses, student IDs, etc.) Retrieved 2/1/11 from http://www.aolnews.com/2009/11/16/coalition-plans-gated-communities-for-afghanistan/ Staff Sgt. Matthew Valek uses a biometric camera to store data for an Iraqi worker at a military base in northern Baghdad in Sept. Biometrics are used by the U.S. military as a key tool for identifying insurgents in Iraq and Afghanistan, but this program expands its application to the civilian population in increasingly restive Helmand.

  17. References Facial Recognition Technology: A Survey of Policy and Implementation Issues http://www.nyu.edu/ccpr/pubs/Niss_04.08.09.pdf Face Recognition http://www.biometrics.gov/Documents/facerec.pdf Facial Recognition http://www.findbiometrics.com/facial-recognition/ http://fingerchip.pagesperso-orange.fr/biometrics/types/face.htm http://www.facedetection.com/ http://restoretherepublic.com/latest-news/breakthrough-face-recognition-computers-can-see-through-disguise.html

More Related