Fast Approximate Energy Minimization via Graph Cuts
IEEE Transactions on Pattern Analysis and Machine Intelligence
3D collage: expressive non-realistic modeling
Proceedings of the 5th international symposium on Non-photorealistic animation and rendering
ACM SIGGRAPH 2008 papers
ACM SIGGRAPH Asia 2009 papers
Structure-aware error diffusion
ACM SIGGRAPH Asia 2009 papers
ACM SIGGRAPH 2010 papers
ACM SIGGRAPH 2010 papers
ACM SIGGRAPH 2011 papers
ACM SIGGRAPH 2011 papers
Arcimboldo-like collage using internet images
Proceedings of the 2011 SIGGRAPH Asia Conference
Image quality assessment: from error visibility to structural similarity
IEEE Transactions on Image Processing
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QR code is a popular form of barcode pattern that is ubiquitously used to tag information to products or for linking advertisements. While, on one hand, it is essential to keep the patterns machine-readable; on the other hand, even small changes to the patterns can easily render them unreadable. Hence, in absence of any computational support, such QR codes appear as random collections of black/white modules, and are often visually unpleasant. We propose an approach to produce high quality visual QR codes, which we call halftone QR codes, that are still machine-readable. First, we build a pattern readability function wherein we learn a probability distribution of what modules can be replaced by which other modules. Then, given a text tag, we express the input image in terms of the learned dictionary to encode the source text. We demonstrate that our approach produces high quality results on a range of inputs and under different distortion effects.