Picode: A New Picture-Embedding 2D Barcode

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Presentation transcript:

Picode: A New Picture-Embedding 2D Barcode Source: IEEE Transactions on Image Processing, Vol. 25, No. 8, 2016. Authors: Chen Changsheng, Huang Wenjian, Zhou Baojian, Liu Chenchen, Mow Wai Ho Speaker: Huang Peng-Cheng Date: 9/20/2018

Outline Introduction Proposed Scheme Experiment Results Conclusion

Introduction(1/2)

Proposed Scheme(1/7) The block diagrams of the PiCode encoding procedures.

Proposed Scheme(2/7) The block diagrams of the PiCode decoding procedures.

Proposed Scheme(3/7) 1. PiCode Encoding ∆𝐼= 100+0.1 25 ×25+ ∈ 0 / ∈ 1 =5∗25+ ∈ 0 / ∈ 1 𝑅=3 ∆𝐼 ∗3 𝑖𝑛𝑛𝑒𝑟 ∆𝐼 3 ∗12 (𝑜𝑢𝑡𝑒𝑟)

Proposed Scheme(4/7) 2. PiCode Decoding ----Coarse-fine corner detection

Proposed Scheme(5/7) 2. PiCode Decoding ---Module Alignment

Proposed Scheme(6/7) 2. PiCode Decoding

Proposed Scheme(7/7) 2. PiCode Decoding △1 and △2 are set as 50% and 150% of the median contrast of all modules in the barcode image, respectively.

Experiment Results(1/7) multi-scale structural similarity (MS-SSIM) metric A. Perceptual Quality

Experiment Results(2/7) B. Decoding Robustness

Experiment Results(3/7)

Experiment Results(4/7)

Experiment Results(5/7)

Experiment Results(6/7) C. Effect of Varying Embedding Intensity λ

Experiment Results(7/7) D. PC and Mobile Implementations

Conclusion it provides one of the best perceptual quality in preserving the aesthetic appearance of the embedded image, while maintains the decoding robustness.

comments Low reliability; Improving the Modulation process, for a better visual quality.