A new #paper accepted in IEEE WIFS'2023, about image #forensics: "PRNU-based source camera statistical certification" by our PhD student Marina Gardella. Here we propose techniques to identify camera models from the #PRNU signature, but adding an statistical #validation This is specially important for the scientific police, for example.

#research #veraai

🌘 感測器指紋:相機識別及其應用
➤ 從媒體取證的角度探討感測器指紋在相機識別中的應用
https://link.springer.com/chapter/10.1007/978-981-16-7621-5_4
本文介紹了感測器指紋在相機識別中的應用。感測器指紋是由於感測器元件製造過程中的微小不完美所導致的噪聲,可以從任意圖像中估計和檢測。本文回顧了關於從感測器噪聲指紋進行相機識別的豐富文獻,重點關注數字相機的靜態圖像和這個領域中不斷發展的挑戰。
+ 本文介紹了感測器指紋在相機識別中的應用,對於從媒體取證的角度來說非常有價值。文章對於感測器指紋的原理和應用進行了深入的探討,對於相關領域的研究者和從業人員都具有參考價值。
+ 本文對於感測器指紋在相機識別中的應用進行了系統性的介紹和分析,對於相關領域的研究和應用都有很大的幫助。文章對於感測器指紋的特點、應用和挑戰進行了詳細的討論,讓讀者對於這一領域有更深入的了解。
#媒體取證 #感測器指紋 #相機識別 #PRNU #數字相機 #影像處理
Sensor Fingerprints: Camera Identification and Beyond

Every imaging sensor introduces a certain amount of noise to the images it captures—slight fluctuations in the intensity of individual pixels even when the sensor plane was lit absolutely homogeneously. One of the breakthrough discoveries in multimedia...

SpringerLink

@will_shake If you are worried about your privacy: Each sensor(camera) has its own fingerprint. To get this fingerprint, a sufficient number of different images is required. I did some basic research on this subject. It took about 20 images from one camera to calculate recognizable PRNU noise pattern from daily life images. There are crop/translation and rotation invariant pattern matching algorithms to identify that sensors. https://en.wikipedia.org/wiki/Photo_response_non-uniformity

#photos #pictures #photography #privacy #prnu

Photo response non-uniformity - Wikipedia

@paulfree14 It mentions it removed metadata from photos to help hide the identity of the photographer too, but I wonder if it also helps against #PRNU identification: https://www.futurity.org/smartphones-cameras-prnu-1634712-2/
Tiny details in photos identify your unique phone - Futurity

"Like snowflakes, no two smartphones are the same."

Futurity