Cameras normally use one of the two methods to 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. OKIOLABS uses Lossless Sensor Zoom (LSZ) technology. This technology enables cameras to zoom in and out without any loss of image quality. Read on to learn how this is possible!
Currently, the LSZ technology is being used on the following products:
- OKIOCAM T
- OKIOCAM T Plus
- OKIOCAM S2 Pro
- Webcam A8
- Webcam A10
The cameras above are capable of QHD or 4K resolutions. However, they can only zoom when being used at no higher than 1920x1080 or 2048x1536 depending on the model, so that there will be an excess of pixels for zooming without any loss of image quality.
For example, when using the above models in Google Meet at 720p, the image before zooming is downsampled from the camera’s highest supported resolution to fit 1280x720. When you zoom in, the image will be cropped from the camera’s highest supported resolution to a smaller size, and then downsampled again to fit 1280x720. The cropping is what results in the zoom, and the downsampling is how any loss of quality is avoided. This process goes on until the maximum zoom level is reached, which means an exact 1280x720 image is cropped and no more downsampling happens.
<Resolution Difference Visualized>
<How LSZ technology works in Google Meet>
There are 4 zoom levels available at every resolution, and the actual zoom percentage depends on the resolution setting you are using. Lower resolution, higher zooming percentage, and vice versa. See the table below for a list of zoom percentages with their corresponding video resolution and zoom level.
If you have any questions about anything mentioned in this article, please contact our support team HERE.