1 .apng image/vnd.mozilla.apng
5 .icc application/vnd.iccprofile
11 .pam image/x-portable-arbitrarymap
12 .pbm image/x-portable-bitmap
13 .pfm image/x-portable-floatmap
14 .pgm image/x-portable-graymap
16 .pnm image/x-portable-anymap
17 .ppm image/x-portable-pixmap