embedding context with photographic steganography
DESCRIPTION
Embedding Context with Photographic Steganography. Wenjia Yuan. Motivation. QR codes. Photometric model. Distortions in the visual MIMO channel Geometric distortion Angular distortion Specularity distortion. Photometric model. Photometric model. Embedded. Original. Embedded. Original. - PowerPoint PPT PresentationTRANSCRIPT
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.