Transparency
The target can store an alpha channel, but converting an opaque image does not create transparent areas. Removing a background is a separate editing step.


The target can store an alpha channel, but converting an opaque image does not create transparent areas. Removing a background is a separate editing step.
Netpbm stores these samples without compression. Reducing colour, thresholding or changing maxval can still lose information before storage; text and binary representations change the layout, not its image meaning. PAM can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.
Source
ZSoft PC Paintbrush

A legacy Paintbrush raster format with planar colour storage and run-length compression.
Explore PCX format →Target
Portable Arbitrary Map

Portable Arbitrary Map: simple uncompressed raster samples for image-processing pipelines.
Explore PAM format →The target can store an alpha channel, but converting an opaque image does not create transparent areas. Removing a background is a separate editing step.
Netpbm stores these samples without compression. Reducing colour, thresholding or changing maxval can still lose information before storage; text and binary representations change the layout, not its image meaning. PAM can store its supported image samples without lossy compression. This applies after rendering and sample conversion: it does not guarantee preservation of source precision, colour space or document structure, and cannot undo earlier losses.
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.
Pixel conversion only. Original EXIF, GPS, XMP and ICC profiles are not copied; processing uses 8-bit display pixels.