Colour Line Scan Technology - Prism

HOW PRISM SENSORS WORK >

Part 2 of our colour line scan series

Read more
Vision Docs - All your documents in one place

NOW AVAILABLE ON THE APP! >

Imaging & Vision Handbook

Read more
Improve your level of machine vision know how

BETTER TO KNOW MORE

Benefit from the expert´s knowledge

Look-up tables (LUT)

Another widely used technique in image processing is 'Look-Up Tables'. LUTs allow image data to be passed through an array that maps an input pixel value to an output value.

Instead of performing mathematical operations on every pixel in the image, the grey value is mapped in the so-called look-up table in a fraction of the time it would take to process each pixel. This is the reason why gamma correction is usually executed using look-up tables.

This technique is easy to implement in hardware and is a very efficient way of improving processing speed. Typical functions that can be implemented using LUTs include: changing image contrast and brightness, or applying a threshold to produce a bi-level (binary) image.