In digital imaging, upscaling an image to a larger size uses a process that estimates new pixel values called?

• A. Cloning
• B. Dithering
• C. Interpolation
• D. Rendering

Answer: (C)

Upscaling an image involves creating new pixel values for the enlarged area, and that is done using interpolation. Interpolation uses surrounding existing pixels to estimate what the new ones should look like, choosing how to blend or measure those neighbors to balance sharpness and smoothness. Common methods include nearest neighbor (quick but blocky), bilinear (smoother by using the four closest pixels), and bicubic (even smoother by considering more neighbors). Dithering is about simulating more colors through patterning, not about estimating new pixel values during resizing. Cloning would copy pixels from another area exactly rather than estimating new ones. Rendering is the broader process of generating an image from data, not the specific upscaling technique.