Convert pnm to pfm Online: pnm2pfm
You can use Tom's Editor to easily convert images from
Portable aNy Map .PNM to Portable Float Map
.PFM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
PNM
PNM images are uncompressed 24 bit RGB images. Can cannot store Alpha channel. PNM images come in 2 types: binary and text. Especially popular on Linux.
PFM
Portable Float Map
is an image format with extension PFM.