吉林大学学报(工学版) ›› 2010, Vol. 40 ›› Issue (06): 1673-1677.

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Blind identification for light source images based on inconsistency in light source direction

LV Ying-da1, SHEN Xuan-jing1,MIAO Jian2,WANG Dan3,CHEN Hai-peng1   

  1. 1.College of Computer Science and Technology, Jilin University, Changchun 130012, China;2.Changchun Municipal Government Procurement Center,Changchun 130011,China;3.Key Laboratory of Bionic Engineering, Ministry of Education,Jilin University,Changchun 130022,China
  • Received:2009-03-02 Online:2010-11-01 Published:2010-11-01

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Abstract:

A new blind identification method is proposed for digital images generated under the irradiation of local light source. The direction of light source is calculated in accordance with the error function between measured intensity and calculated intensity, as well as the regularization term suitable for local light source model. The direction of the light source is taken as the criterion to determine the authenticity. 486 photos in the database of experiment images are tested, among which the rate of correct detection reaches up to 77.16%, and the minimum and maximum errors are 0.2° and 1.0° respectively.

Key words: computer application, information processing technology, digital forgeries, local light source, light source direction, blind identification, image authenticity

CLC Number: 

  • TP391
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