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Intra- and inter-model similarities<br />
◮ device identification – examined characteristic is unique for each device<br />
⊲ CCD / CMOS sensor noise [Lukáˇs et al., 2005]<br />
◮ model identification – examined characteristic is similar for all devices of one<br />
particular model and differs between different models<br />
inter-model<br />
intra-model similarity intra-model similarity<br />
similarity<br />
low for device identification<br />
high for model identification<br />
low similarity<br />
low for device identification<br />
high for model identification<br />
Gloe & Kirchner Digital Image Forensics slide 20