Howtosignalprocessing
The spatial frequency response (SFR), analogous to the MTF of an optical imaging system, is one of the four measurements for analysis of spatial resolution defined in ISO/FDIS 12233, and it provides a complete profile of the spatial response of digital still-picture cameras.
- What is the meaning of spatial frequency?
- What is an example of spatial frequency?
- What is spatial frequency Why is it important?
- What is the difference between MTF and SFR?
What is the meaning of spatial frequency?
The spatial frequency is defined as line pairs per angular extent of the target, and the phase specifies the relative location of the target image to the detector array raster. From: Encyclopedia of Modern Optics, 2005.
What is an example of spatial frequency?
Spatial frequency describes the periodic distributions of light and dark in an image. High spatial frequencies correspond to features such as sharp edges and fine details, whereas low spatial frequencies correspond to features such as global shape.
What is spatial frequency Why is it important?
"Spatial frequency" refers to the number of pairs of bars imaged within a given distance on the retina. One-third of a millimeter is a convenient unit of retinal distance because an image this size is said to subtend one degree of visual angle on the retina.
What is the difference between MTF and SFR?
The term SFR is currently recommended when describing resolution measurements, even though the term MTF (modulation transfer function) is still very common. An MTF is an SFR, but not all SFR's are an MTF. Per definition, an SFR is only an MTF if modulation is involved and the modulation uses harmonic functions.
