compression of the size of a picture file without harming the quality of the picture itself
Image compression is the application of
Data compression on
digital images. In effect, the objective is to reduce redundancy of the image data in order to be able to store or
transmit data in an efficient form.Image compression can be
lossy or
lossless. Lossless compression is sometimes preferred for artificial images such as technical drawings, icons or comics. This is because lossy compression methods, especially when used at low
bit rates, introduce
compression artifacts. Lossless compression methods may also be preferred for high value content, such as medical imagery or image scans made for archival purposes. Lossy methods are especially suitable for natural images such as photos in applications where minor (sometimes imperceptible) loss of fidelity is acceptable to achieve a substantial reduction in bit rate.
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