OIS, or Optical Image Stabilization, is a technology used in cameras, particularly in smartphones, digital cameras, and camcorders, to minimize blurring caused by hand movements during the capturing of images or video footage. This technology aims to ensure sharper and more stable photographs or videos by compensating for the unintentional shaking or movement of the camera.

OIS works by employing a system of sensors, lenses, and motors within the camera mechanism. These components detect any movement or trembling and make rapid adjustments to counteract them. The system moves specific lens elements rapidly to counterbalance the shaking, compensating for any motion that can cause blurry results. By stabilizing the imagery, OIS helps in rendering clearer and more focused photos and videos, even under conditions where steadiness is hard to maintain, such as low-light environments or situations where the photographer is on the move.

The use of OIS can greatly improve the overall image quality and user experience, especially for individuals who take a lot of photos or record videos without the aid of a tripod or stabilizing equipment. It allows for more flexibility in capturing shots without worrying too much about slight hand movements leading to unsatisfactory results. OIS has become a common feature in smartphones and cameras, contributing to the continuous advancement of photography and videography technologies.