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Published byMolly Blake Modified over 5 years ago
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Hiding Secret Information in a Color Palette Image with Hybrid Strategies
Authors: Chin-Chen Chang, Yi-Hui Chen, and Chia-Chen Lin Speaker: Chin-Chen Chang
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Outline Introduction The proposed scheme Experimental results
Conclusions
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Introduction Information Hiding Compression code 1000011010…
Secret data: 011 Receiver Reconstructed Image Sender Compression Code: … Host Image Secret data: 011
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Palette Image Color-Palette Image Color Palette
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The proposed scheme (1/10)
Luminance-sorted Palette Red pixel value Blue pixel value Luminance value Green pixel value
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The proposed scheme (2/10)
Luminance-sorted Palette
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The proposed scheme (3/10)
Luminance-sorted Palette
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The proposed scheme (4/10)
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The proposed scheme (5/10)
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The proposed scheme (6/10)
Phase-1 data embedding K If D(K0, x) < T Output: 1 indicator 100 compression code 4 secret data:001 x Similar to Else if D(K0, x) > T Go to: sorted color palette
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The proposed scheme (7/10)
Phase-2 data embedding P Secret data: 0 or 1 If D(Pc', P12) < D(Pc', P7) Output: 0 Indicator Secret data: compression code Secret data: 1 1100 compression code Else if D(Pc', P12) > D(Pc', P7) Output: 0 Indicator Secret data: 0 0000 1100 compression code Secret data: 1 compression code x’s best similar codeword
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The proposed scheme (9/10)
Phase-1 data extraction Compression code: 001 (6, 9, 7) K
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The proposed scheme (10/10)
Phase-2 data extraction Compression code: P Because 7<12 Since D(Pc', P12) < D(Pc', P7) (14, 4, 5) (14, 4, 5)
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Experimental results (1/3)
The color host images with size 512 × 512 Lena Pepper Baboon Three stego-images for threshold T=20 PSNR: dB Hiding capacity: 304 Kb PSNR: dB PSNR: dB Hiding capacity: 271Kb Hiding capacity: 257 Kb
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Experimental results (2/3)
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Experimental results (3/3)
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Conclusions A novel scheme is proposed to hide large amount of secret data into a color image. The qualities of the reconstructed images are good.
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Thank you so much!
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