Slides (pdf) - Jesse Kornblum

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DC3Digital Ballistics! This is just one step in the process! Image from camera processed in Photoshop– According to Calvin, is from Photoshop– But image contains EXIF and other metadata– Clues in the image itself (e.g. presence of skin tones)
Digital BallisticsDC3Processed with the GimpStandard Tables, Q=80
Page 4 and 5: Real PictureDC3WARNING:EXPLICIT IMA
Page 6 and 7: Real PictureDC3Image © Copyright P
Page 8 and 9: DC3! JPEG Compression- Lossy compre
Page 10 and 11: Quantization TablesDC32 1 1 1 1 1 2
Page 12 and 13: DC3Quantization Calculations! Origi
Page 14 and 15: IJG Standard TableDC316 11 10 16 24
Page 16 and 17: DC3IJG Standard Tables! Most softwa
Page 18 and 19: Adobe PhotoshopDC3! Adobe Photoshop
Page 20 and 21: DC3Custom Adaptive Tables! Table is
Page 22 and 23: Digital BallisticsDC3! Match to ind
Page 24 and 25: DC3Digital Ballistics! Set of known
Page 26 and 27: DC3Calvin! By default, displays fil
Page 28 and 29: DC3Calvin! Can dump tables from an
Page 32 and 33: Digital BallisticsDC3But contains s
Page 34 and 35: DC3Acknowledgements! Imagery provid

Slides (pdf) - Jesse Kornblum

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