.
.file extension APT - APT encoded bitmap file
File extension APT description:
APT stands for Adaptive Prediction Trees. It is a general-purpose image coding method for lossless and lossy compression. It codes monochrome and colour images with bit depths from 1 to 16 bits per component.
Associated applications to file extension APT:
Company / developer:
John Robinson
APT uses principal components analysis, a multicomponent image pyramid, shape-adaptive non-linear predictions, adaptive runlength and Huffman coding. It also supports coding with colour palettes where appropriate. No part of APT is patented (but see the note below on the palette ordering method in the provided source code).
APT is inherently progressive, and a straightforward modification of the decoder to write directly to an on-screen picture buffer allows simple, progressive, image recovery.