VIA Technologies EPIA SN-Series Specifications download pdf (Page 31)

Remote Sensing and Photogrammetry, State of the Art Technologies

remote sensing applications. A possible classification of airborne sensors can be done

based on the two principal architecture currently adopted [Ref. (4)]:

 Airborne digital cameras, that produce frame images;

 Airborne pushbroom line scanners, that produce continuous strip imagery of

the terrain

3.1.1 Airborne Digital Cameras

Airborne digital cameras can be further subdivided into three specific categories:

 Small format, cameras equipped with sensors up to 16 Megapixels;

 Medium format, cameras equipped with sensors between 16 and 50

Megapixels;

 Large format, cameras with large sensors with more than 50 Megapixels.

Small format cameras are usually frame cameras equipped with CCD or CMOS two-

dimensional arrays, monochrome or coupled with mosaic RGB filters to produce colour

images or IR filters for false-colour images. An example of monochrome camera is the

Carl Zeiss VOS 40 which uses an high speed, 4 Megapixels CCD area array and can be

equipped with lens up to 500 mm of focal length. Colour camera are the most diffuse

because they are based on consumer DSLR cameras aimed at the professional

photography market. For airborne use they are fitted to anti-vibration mount together with

an electronic unit that controls the timing and exposure of the image. In some cases a

GPS and IMU units can be adopted to generate tilt data to help carry out the rectification

of the images (Figure 20).

Figure 20:Carl Zeiss VOS 40 [Ref. (5)] and a DSLR Canon EOS 1D [Ref(6)]

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VIA Technologies EPIA SN-Series Specifications Page 31