@inproceedings{eb57bd8f636c4a65b668266c1400746d,
title = "Towards camera identification from cropped query images",
abstract = "PRNU (Photo Response Non-Uniformity)-based camera fingerprints are useful for identifying the source camera of an anonymous image. As the query image has to be correlated with each candidate camera fingerprint, one key concern of this approach is the high run time overhead when using a large camera database. Clever techniques have been proposed to reduce the computation and I/O time either by reducing the size of the fingerprint or by group testing where multiple candidate fingerprints can be eliminated by a single correlation operation. However, these techniques assume that the query images have not been scaled or cropped. In practice this may often not be the case, especially when query images are taken from social media sites. This paper presents a simple scaling-based approach for source camera identification when the query image is of full resolution or if it is cropped from an unknown location (of the original image). The proposed approach can also be easily combined with other known approaches for PRNU matching of scaled images. Experiments using 250 cameras showed that the run time overhead can decrease by a factor 13 when the query is a cropped image.",
keywords = "Camera Fingerprint, PRNU, Source Camera Identification",
author = "Waheeb Yaqub and Manoranjan Mohanty and Nasir Memon",
year = "2018",
month = aug,
day = "29",
doi = "10.1109/ICIP.2018.8451749",
language = "English (US)",
series = "Proceedings - International Conference on Image Processing, ICIP",
publisher = "IEEE Computer Society",
pages = "3798--3802",
booktitle = "2018 IEEE International Conference on Image Processing, ICIP 2018 - Proceedings",
note = "25th IEEE International Conference on Image Processing, ICIP 2018 ; Conference date: 07-10-2018 Through 10-10-2018",
}