发表于 2016-9-10 16:07:25
标 题: Re: 关于iPhone 7 plus双镜头虚化模式的一些遐想~ （转载） (
Bokeh can be simulated by convolving the image with a kernel that
corresponds to the image of an out-of-focus point source taken with a real
camera. Unlike conventional convolution, this convolution has a kernel that
depends on the distance of each image point and – at least in principle –
has to include image points that are occluded by objects in the foreground.[
20] Also, bokeh is not just any blur. To a first approximation, defocus blur
is convolution by a uniform disk, a more computationally intensive
operation than the "standard" Gaussian blur; the former produces sharp
circles around highlights whereas the latter is a much softer effect.
Diffraction may alter the effective shape of the blur. Some graphics editors
have a filter to do this, usually called "Lens Blur."
【 在 allienpig (猪 in black) 的大作中提到: 】