When a shotgun is fired, it is often necessary to analyse the pattern of pellet dispersion for forensic or scoring purposes. This is done typically by firing at a large card or paper target with varying chokes and cartridge types. The resulting hole patterns in a given piece of card may be analysed to measure dispersion by manual means, however this is time-consuming and prone to error.

The Shotgun Scatter Analyser operates by presenting a paper target of nominal area 1m x 1m. The operator fires at the target and then presses a key to advance the paper through the built in image analyser.  The image from the camera is used to measure the hole shape parameters, area and positions. Due to the complex mathematical algorithms being used, sub-pixel accuracy is possible, giving precision measurement over the entire area.