Using a modern smartphone, the user can receive photos of almost professional quality. Of course, most often expensive smartphones can boast of this. Some of them are equipped with the so-called optical image stabilization or OIS (Optical Image Stabilizer). What is it and why is it needed?
Image stabilization is a technology that allows you to compensate for the camera’s own angular movements to prevent blurry images. Have you noticed that when your hands are shaking, even slightly, for example, in the cold, the image may turn out to be blurry? It is here that optical image stabilization comes to the rescue, which will prevent blurring. However, you need to understand that there is a limit to everything, so the technology is designed to compensate for the movement of the subject – with the rapid movement of the subject, blurring cannot be eliminated. Simply put, OIS serves as an invisible tripod. By the way, OIS shows itself perfectly not only when shooting photos, but also when recording videos.
How does optical stabilization work? Let’s explain in simple terms: special sensors are built into the camera that allow you to determine the angle of rotation and the speed of the device in space, after which they give commands to the drives, and those, in turn, reject the matrix or the stabilizing element.
We give a simple example. The first image turned out to be blurry – this can be seen if you look closely:
The second – using optical stabilization, the texture is visible:
It is also worth noting that there is the so-called electronic (software) image stabilization – EIS (Electronic (Digital) Image Stabilizer). In this case, the camera does not contain additional mechanical elements, and all processors are processed by the processor. As a rule, EIS is found on low-cost devices, since this technology is much cheaper than OIS. The latter, as already written, is found mainly on expensive smartphones.