AVS X image
AVS X image (or Stardent AVS X image) is a simple raster image file format. It stores uncompressed RGBA images. AVS undoubtedly stands for Application Visualization System.
Files have an 8-byte header containing the width and height, followed by the pixel data.
- ImageMagick (format named "AVS")
- Netpbm (starting with version 10.50): pamtoavs, avstopam
- Tom's Editor
The coding of the alpha samples is unknown to us. In the mandrill.x.gz sample file, the alpha samples are all 0, implying that 0 means opaque. But the applications we've looked at all think that 0 means transparent.
There might be some information buried in these documents.