iCCP and iCCN specify different ICC versions

w3c / ColorWeb-CG

repo for the Color on the Web Community Group

54 stars 21 forks source link

iCCP and iCCN specify different ICC versions #31

Closed ProgramMax closed 3 years ago

ProgramMax commented 3 years ago

The HDR in PNG proposal currently says the only difference between the iCCP and iCCN chunks is Latin-1 vs. UTF-8 profile names.

But this is not completely correct. The PNG spec explicitly says iCCP is ICCv2. Although many decoders treat iCCP as ICCv4, the iCCN chunk would be explicitly ICCv4.

This commit clarifies this distinction.

Closes #30

svgeesus commented 3 years ago

Yes, the inadvertent restriction to ICC v.2 in the 2003 PNG specification is a known erratum