What is definition of scaling in computer graphics?
In computer graphics, image scaling is the process of resizing a
digital image. Scaling is a non-trivial process that involves a
trade-off between efficiency, smoothness and sharpness. With bitmap
graphics, as the size of an image is reduced or enlarged, the
pixels which comprise the image become increasingly visible, making
the image appear "soft" if pixels are averaged, or jagged if not.
With vector graphics the trade-off may be in processing power for
re-rendering the image, which may be noticeable as slow
re-rendering with still graphics, or slower frame rate and frame
skipping in computer animation.
More to read by opening the link.