How is pixel density calculated?

Pixel density is an important concept in video surveillance and imaging, as it relates to the amount of detail captured within a defined area. To calculate pixel density, the correct approach is to take the horizontal resolution and divide it by the scene width. This calculation provides a measure of how many pixels are effectively representing the scene across a specified width, which directly correlates to how much detail can be captured and perceived in the image.

By understanding pixel density in this way, professionals can better assess the quality of surveillance footage and optimize camera placement and settings for a specific environment. This metric is particularly crucial in applications where detail is paramount, such as license plate recognition or facial recognition, where higher pixel density translates into clearer, more useful images.