Reading ../../../../../oiio-images/pnm/test-1.pfm
../../../../../oiio-images/pnm/test-1.pfm :   64 x   64, 3 channel, float pnm
    SHA-1: ACEB5CA4B88F78E3344D79E7C8E16200FF434085
    channel list: R, G, B
    pnm:bigendian: 0
Reading ../../../../../oiio-images/pnm/test-2.pfm
../../../../../oiio-images/pnm/test-2.pfm :  240 x  240, 3 channel, float pnm
    SHA-1: 312B084985EF1B9C20D35A9D7A5DC8E8EAEB25A0
    channel list: R, G, B
    pnm:bigendian: 0
Reading ../../../../../oiio-images/pnm/test-3.pfm
../../../../../oiio-images/pnm/test-3.pfm :  240 x  240, 3 channel, float pnm
    SHA-1: 613A9639725F51ADC8B6F8F5A38DB5EFF0B3A628
    channel list: R, G, B
    pnm:bigendian: 1