Abstract
With the rapid development of virtual reality (VR), 360° omnidirectional images and videos have drawn wide attention. However, the quality assessment of 360° omnidirectional images is a challenging task, especially when the panoramic image contains multiple stitching distortions. We propose a viewport-based stitched 360° omnidirectional image quality evaluator (VSOIQE), by first extracting the features of salient and stitching viewports, and then inferring the overall perceptual quality via multiple linear regression (MLR). Comprehensive image attributes including edge, color, shape and information entropy are considered in the framework. Experimental results on two benchmark databases demonstrate the superiority of the proposed metric over both the state-of-the-art quality models designed for 2D images and the quality models developed for 360° omnidirectional images.
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