Lossless. Compression techniques do not remove detail from the image.
they are lossless...
Lossy
lossless
The most common file extensions for image files are: GIF: Old, can be animated, 8-bit color JPEG/JPG: High compression rate, No transparency, lossy PNG: Can be transparent, lossless
Pict files can use 2 different forms of compression. 1- RLE Compression (the default) is lossless. 2- JPEG compression (only on some systems/graphics programmes) is lossy.
shush
plane waves in lossy dielectrics
lossless
File compression uses software algorithms to reduce file size by reducing the bit-rate of a file. Lossy compression takes it a bit further and lowers the quality of thr file to make it even smaller. Lossy compression is commonly used for media files, but would not be appropriate for other types of files.
Lossy= You lose somedata Lossless= You dont
GIF is a lossless compression introduced by CompuServe in 1987 using Lempel-Ziv-Welch (LZW) lossless data compression.
Lossless data compression such as that used by the algorithms that generate TIFF or PNG files retains all the original information.