Spatial and frequency properties of noise

1. What is the difference between spatial and frequency domain filtering?
2. What is spatial domain and frequency domain in image processing?
3. What is spatial frequency in digital image processing?
4. What is spatial frequency filtering?

What is the difference between spatial and frequency domain filtering?

Difference between spatial domain and frequency domain

In spatial domain, we deal with images as it is. The value of the pixels of the image change with respect to scene. Whereas in frequency domain, we deal with the rate at which the pixel values are changing in spatial domain.

What is spatial domain and frequency domain in image processing?

Spatial domain — enhancement of the image space that divides an image into uniform pixels according to the spatial coordinates with a particular resolution. The spatial domain methods perform operations on pixels directly. Frequency domain — enhancement obtained by applying the Fourier Transform to the spatial domain.

What is spatial frequency in digital image processing?

"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 spatial frequency filtering?

Spatial filtering is a process by which we can alter properties of an optical image by selectively removing certain spatial frequencies that make up an object, for example, filtering video data received from satellite and space probes, or removal of raster from a television picture or scanned image.