Joint visual attention and rendering complexity based sample rate estimation in selective rendering

In this work, a sample rate estimator is proposed for selective graphics rendering so that the samples are allocated such that the best perceived image quality can be achieved under a given sample budget. In the proposed estimator, the sample rate of a pixel is decided by not only the visual attention (VA) level of the region to which the pixel belongs but also the required rendering complexity (RC) level of the pixel. The VA and RC values are determined based on the phase-spectrum of the Fourier transform (PFT). Compared with existing sample rate estimators for selective rendering that only consider the VA information, the proposed estimator helps to produce synthesized images with higher perceived quality using the same number of samples.