Howto rips into sprites

The following BATch command used with ImageMagick, would generate a 320x200 (or rather 426x200 in case of 16:9 files) weapon sprites out of 720p source, for direct use in ZDoom. Use -trim and SLADE to position them correctly, or use a TEXTURES lump to do the same.

for %f in (<input directory>\*.*) do convert.exe %f -filter lanczossharp -resize 33.3x27.8% -mattecolor #000000 -channel alpha -threshold 89.4% <output directory>\%~nf.png

Add -trim to automatically trim sprites, and use this technique: http://www.doomworld.com/vb/wads-mods/69614-hd-sprites-from-doom-3/2/
to generate yourself a TEXTURES lump