Avoiding bleeding in image blending

Though elegant in mathematical formulation, gradient-domain image blending suffers from bleeding artefacts in real world applications. We propose an image blending algorithm that avoids bleeding artefacts while preserving the good properties of gradient-domain blending, such as smooth transitions be...

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Bibliographic Details
Main Authors: Wang, Minxuan, Zhu, Zhe, Zhang, Songhai, Martin, Ralph, Hu, Shi-Min
Format: Conference Proceeding
Language:English
Subjects:
Approximation algorithms
bleeding artefacts
Convolution
gradient-domain blending
Graphics processing units
Hemorrhaging
image stitching
Interpolation
Mathematical model
Robustness
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Description
Summary:Though elegant in mathematical formulation, gradient-domain image blending suffers from bleeding artefacts in real world applications. We propose an image blending algorithm that avoids bleeding artefacts while preserving the good properties of gradient-domain blending, such as smooth transitions between the candidate regions. Our key idea to finesse the non-smooth boundary difference calculation that causes bleeding artefacts is to use local patch differences. While most previous gradient-domain blending algorithms change one region to fit the other, to further reduce bleeding, we perform bidirectional blending so that both regions change simultaneously. Our blending algorithm is fast: when applied to image stitching, it can achieve 20 fps at 4K resolution. Source code and test images are publicly available.
ISSN:2381-8549
DOI:10.1109/ICIP.2017.8296660