Traditional Culture Encyclopedia - Photography and portraiture - What is the essential difference between microwave imaging and photography and scanning imaging?

What is the essential difference between microwave imaging and photography and scanning imaging?

There are many ways to realize microwave imaging, but the microwave section refers to the electromagnetic wave with the frequency of 300MHz-300GHz, which is the abbreviation of a limited frequency band in radio waves, that is, the electromagnetic wave with the wavelength between 1 m (excluding 1 m) and 1 mm, which may be called radar imaging more accurately. At present, more mature radar imaging includes phased array imaging, sar imaging and insar imaging, including two-dimensional images and three-dimensional images. Simply put, by processing radio echoes, time and space can be distinguished, that is, high spatial resolution can be achieved and imaging effect can be achieved.

Microwave imaging generally has no color 2D or 3D imaging. Photography and scanning imaging are that photosensitive elements have different reactions to different colors of light, so they are colored, but they generally only have 2D color imaging.