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7 March 2013Real-time content-aware video retargeting for tunnel vision assistance
Image and video retargeting technologies are effective means of resizing media for aspect ratio constrained
applications. In this paper, a real-time video retargeting model is proposed for smartphone implementation and
potential application to low vision assistance for individuals with tunnel vision. Seam carving is a content-aware
retargeting operator which defines 8-connected horizontal or vertical paths, or seams of pixels. The optimality
of these seams is based on a specific energy function. Seam removal permits changes in the aspect ratio while
simultaneously preserving important regions. This paper introduces a video retargeting model that incorporates
spatial and temporal considerations to preserve visual integrity. Face detection masks and salience maps are
used to achieve more comprehensive results. Additionally, formulation of a novel temporal coherence measure
is presented that allows for retargeting on streaming video in real-time. Integration of the model with a mobile
platform emphasizes its portability.
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Thomas Knack, Andreas Savakis, "Real-time content-aware video retargeting for tunnel vision assistance," Proc. SPIE 8667, Multimedia Content and Mobile Devices, 86670N (7 March 2013); https://doi.org/10.1117/12.2003862