20 Apr 2021

OKIOCAM T’s Awesome Zoom Technology Explained

Cameras normally use one of two methods of zoom — optical zoom or digital zoom. Optical zoom involves the physical movement of the lens within the camera, whereas digital zoom is a result of image processing inside the camera, normally resulting in noticeable image quality loss. OKIOCAM T uses Lossless Sensor Zoom (LSZ) technology. This technology enables it to zoom in and out without any loss of image quality. Read on to learn how this is possible!

The camera inside OKIOCAM T is capable of QHD resolutions (up to 2592×1944!). However, it can only zoom when being used at 1080p and lower. What this means is that when recording or streaming at or below 1080p, there will be an excess of pixels. For example, if you are using your OKIOCAM with Google Meet, and it is running at 720p (the maximum resolution supported by Google Meet), its resolution will be downsampled from 2592×1944 to fit 1280×720. As you press the zoom button on your OKIOCAM T, its image will be cropped and downsampled again. The cropping is what results in the zoom and the downsampling is how any loss of quality is avoided. This cropping and downsampling continues until the maximum zoom level is reached and an exact 1280×720 image is cropped and no downsampling happens.

This resolution difference visualized
How LSZ technology works in Google Meet

The degree of zoom available will depend on the current resolution, with lower resolutions offering higher degrees of zoom. Four zoom levels are available at every resolution. See the table below for a list of video resolutions and their corresponding zoom levels.

If you have any questions about anything mentioned in this article, please contact our support team here.

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