Convert dhr to pnm Online: dhr2pnm

You can use Tom's Editor to easily convert images from
Double High-Resolution .DHR to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

DHR

Double High-Resolution is an image format with extension DHR.

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.