Oversampling is the process of scanning or capturing an image at a higher resolution than the optimum or required sampling rate. This produces extra data points, which can be used to improve image quality through digital processing, reduce aliasing, or enhance detail during resizing.
While oversampling can improve the accuracy and sharpness of digital images, it also increases file size and processing requirements. Photographers and imaging professionals use oversampling strategically to achieve precise detail and better reproduction when preparing images for printing or high-resolution display.