instantaneous field of view

pixel

Number of line pairs

The higher the spectral resolution, the more targeted the special research will be, the higher the object recognition accuracy will be, and the better the results of remote sensing application analysis will be.

radiation quantification level

effective quantization level

Summarize

frame camera

slit camera

panoramic camera

multispectral camera

CCD is a semiconductor. The CCD sensor is equivalent to the film of a traditional camera. It is essentially a shift memory composed of MOS (metal-oxide-semiconductor) capacitors arranged according to a certain pattern. Sensors (or light-sensitive cells) on each array sense radiant energy from each pixel within the image area. When this energy is transferred to the surface of the sensor, a small charge is created as the amount of charge equalizes the brightness of the scene in the pixel. This process results in a The generation of pixel brightness value for each photosensitive unit.

CCD photosensitivity process: The process of CCD photosensitivity is the process in which photons impact the photosensitive element to generate signal charges, and the charges are stored and transmitted through the MOS on the CCD. CCD or CMOS semiconductors are more sensitive to changes in brightness from the image field than silver halide crystals in film. The dynamic range of scene brightness values ​​observed by electronic sensors is also wider than that of film.

CCD and CMOS image sensors are monochromatic. To obtain color data, the photosensitive cells on each sensor array are covered with blue, green, and red color filters. Usually, the photosensitive unit is square and consists of alternating blue, green, and red photosensitive units forming a Bayer pattern. Half of the color filters in the array are green, and the other half are equal amounts of blue and red color filters. .

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Generally divided into

According to the size of the area array sensor array, it is generally divided into small, medium and large format cameras.

It consists of two parts: mechanical scanning device and spectroscopic device.

Advantages and Disadvantages

charge coupled device CCD

Advantages and Disadvantages

True aperture view radar

synthetic aperture radar

Ground lidar

airborne lidar

Spaceborne lidar

pulse type

phase type