Despite the low cost, the resolution offered at present (2015) is rather impressive, with low-end webcams offering resolutions of 320×240, medium webcams offering 640×480 resolution, and high-end webcams offering 1280×720 (aka 720p) or even 1920×1080 (aka 1080p) resolution.
They have also become a source of security and privacy issues, as some built-in webcams can be remotely activated by spyware.
Some of them, for example, those used as online traffic cameras, are expensive, rugged professional video cameras.
making them the lowest-cost form of videotelephony.
The video streams provided by webcams can be used for a number of purposes, each using appropriate software: Most modern webcams are capable of capturing arterial pulse rate by the use of a simple algorithmic trick.