Each of its pixels is sensitive to specific incident angles and supplies a component of the mathematical operation called the FourierTransform to produce an image about 20 pixels across.
The OTF (Optical Transfer Function) of an optical system can be evaluated by the FourierTransformof the first derivative of the optical image of an knife-edge (object).
对光学系统输出刀口像的一阶导数做傅里叶变换,可以得到该系统的光学传递函数(OTF)。
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The edge Fouriertransform is an important shape descriptor, but it makes use of only the image edge information ignoring the image region information.