What's the difference between multispectral data and panchromatic data?

The differences between multispectral data and panchromatic data are as follows:

1, different definitions:

Panchromatic image is a black-and-white image obtained by remote sensor in the whole visible light band (generally defined between 0.4μ and 0.7μ), which is called panchromatic image.

Multispectral images refer to images containing many bands, sometimes only three bands (color images are an example), but sometimes there are more or even hundreds of bands. Each band is a gray image, which represents the brightness of the scene according to the sensitivity of the sensor used to generate the band.

2. Different image acquisition methods:

Multispectral image is the acquisition of multiple single bands in ground radiation, and the acquired image data will contain spectral information of multiple bands. Give RGB colors to different bands, and you will get color images.

Even if the frequency of black image formation is higher than that of full-color image formation, full-color data images can have a longer life, especially for black light sources, by prolonging the life of equipment components related to black image formation.

3. Different bands:

Multispectral images usually refer to 3 to 10 band. Each band is obtained by using a remote sensing radiometer. The wavelength region of panchromatic image is a black-and-white image between 0.4μ and 0.7μ.

Baidu Encyclopedia-Multispectral Images

Baidu encyclopedia-panchromatic images