结合视觉注意机制,通过大量主观实验,定量研究了对比度因素对立体图像视觉舒适度的影响。首先结合平面显著图和立体视差图获得立体显著度图,再利用模糊隶属度和掩模对其进行优化,获得显著立体图像,并用眼动仪验证其合理性;然后对左右视图进行对比度变换和主观实验,数据筛选后得到显著立体图像的舒适对比度匹配图和差异图。实验结果表明:左右视图的对比度差异门限值随着左视图对比度值的不同而改变,且左右视图对比度差异不能过大,最大和最小差异值分别为1.97和-2.40。实验所得舒适对比度范围很好地反映了立体图像的舒适度,验证实验的正确率达95%,为立体内容的制作提供了更合理可行的定量标准。

Combined with the visual attention mechanism, the influence of contrast factor on visual comfort of stereo image is studied quantitatively through a large number of subjective experiments. First, a stereo salient degree map is derived from stereo disparity map and planar salient map. It is optimized through fuzzy membership degree and mask, and the salient stereoscopic images can be obtained. An eye tracker is used to verify its rationality. Then, a series of subjective experiments are conducted after contrast conversion of left and right views. Finally, the comfortable contrast matching map and difference map are obtained after data screening. The experimental results show that the contrast difference thresholds of left and right view change with different left view contrasts, and the contrast difference should not be too large. The maximum and minimum difference values are 1.97 and -2.40, respectively. The obtained comfortable contrast ranges reflect the comfort of stereo image better, and the correct rate reaches 95%, which provides more reasonable and feasible quantitative standards for the making of stereo contents.