1 .apng image/vnd.mozilla.apng
6 .icc application/vnd.iccprofile
13 .pam image/x-portable-arbitrarymap
14 .pbm image/x-portable-bitmap
15 .pfm image/x-portable-floatmap
16 .pgm image/x-portable-graymap
18 .pnm image/x-portable-anymap
19 .ppm image/x-portable-pixmap