What is image upscaling?

Image upscale means increasing the resolution of an image without degrading its quality. You can upscale a low-res picture to make it suitable for large displays, like HD screens, banners, online publishing, etc. A common example of this is transferring old TV and film footage for modern HDTVs. Upscaling is also used to increase the resolution of product images for different eCommerce platforms, to make them look sharp and appealing to online shoppers.