A novel method for detecting light source for digital images forensic

• Autorzy: Roy A. K. , Mitra S. K. , Agrawal R.
• Języki publikacji: EN

Abstrakty

EN

Manipulation in image has been in practice since centuries. These manipulated images are intended to alter facts - facts of ethics, morality, politics, sex, celebrity or chaos. Image forensic science is used to detect these manipulations in a digital image. There are several standard ways to analyze an image for manipulation. Each one has some limitation. Also very rarely any method tried to capitalize on the way image was taken by the camera. We propose a new method that is based on light and its shade as light and shade are the fundamental input resources that may carry all the information of the image. The proposed method measures the direction of light source and uses the light based technique for identification of any intentional partial manipulation in the said digital image. The method is tested for known manipulated images to correctly identify the light sources. The light source of an image is measured in terms of angle. The experimental results show the robustness of the methodology.

Słowa kluczowe

EN

image forensics; manipulation; least square approximation; surface normals; decorrelation; noise filter

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2011
• Tom: Vol. 19, No. 2
• Strony: 211--218
• Opis fizyczny: Bibliogr. 26 poz., il.

Twórcy

autor

Roy A. K.

• Dhirubhai Ambani Institute of Information and Communication Technology, Gandhinagar, Gujarat, 382007 India

autor

Mitra S. K.

• Dhirubhai Ambani Institute of Information and Communication Technology, Gandhinagar, Gujarat, 382007 India

autor

Agrawal R.

• Dhirubhai Ambani Institute of Information and Communication Technology, Gandhinagar, Gujarat, 382007 India

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