Depth of Field(DOF)与HDR类似,也是一种图形图像后处理手法。它渊源于物理光学中透镜成像过程中的焦散造成的前景和远景模糊化的现象,与HDR一样,都是为了增强Computer Graphics的真实感,在实时渲染中是很常见的一种技术。
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