Know-how: Polarisation

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Very High Resolution Imaging

This Tech Tip discusses very high resolution imaging and the various ways it can be achieved.

Line scan cameras, in their simplest forms, use a sensor with a single line of pixels. Typical resolutions vary from 512x1 pixels upto 16384x1 pixels, see Figure 1. Line scan cameras work in a similar way to a flatbed scanner, fax machine or laptop fingerprint scanner by building up an ‘area image’ from multiple lines. In a machine vision camera this typically happens in a framegrabber. As only the width of the resulting image is fixed, it allows a very high resolution image to be created and also means that images of different aspect ratios can be created.