embedding context with photographic steganography
Post on 22-Mar-2016
31 Views
Preview:
DESCRIPTION
TRANSCRIPT
Embedding Context with Photographic Steganography
Wenjia Yuan
2
Motivation
• QR codes
3
Photometric model
• Distortions in the visual MIMO channel– Geometric distortion– Angular distortion– Specularity distortion
4
Photometric model
𝐼 𝑜∝∫𝜆
❑
[𝜌 ⋅ 𝑓 (𝜃 ,𝜆 ) ]𝑠 (𝜆)ⅆ 𝜆
5
Photometric modelOriginal Original EmbeddedEmbedded
Division Division
6
Photographic steganography
• Photometric ratio
𝐼 1∝∫𝜆
❑
[𝜌 ⋅ 𝑓 (𝜃 , 𝜆 )] 𝑠(𝜆)ⅆ 𝜆
𝐼 2∝∫𝜆
❑
[𝜅 𝜌 ⋅ 𝑓 (𝜃 , 𝜆 )] 𝑠(𝜆)ⅆ 𝜆
𝐼2𝐼1
=𝜅
7
Photographic steganography
• Receiver
Min-Group
Min-Group Binary matrix
8
Photographic steganography
• Min-Group method for reflection removal
9
Experiments
• Indoor
10
Experiments
• Outdoor
11
Conclusions
• Develop a model for image formation of an active scene containing electronic displays
• Present real-time photographic steganography for visual MIMO optical system.
top related