[SOLVED] identify: ... Q16 ... HDRI

Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
Post Reply
NicolasRobidoux
Posts: 1944
Joined: 2010-08-28T11:16:00-07:00
Authentication code: 8675308
Location: Montreal, Canada

[SOLVED] identify: ... Q16 ... HDRI

Post by NicolasRobidoux »

I find it confusing that identity, on an IM compiled with --enable-hdri, says Q16 in the first line and HDRI in the Features line.
Is there a reason for the Q16 in this situation?
Last edited by NicolasRobidoux on 2012-06-26T04:19:02-07:00, edited 1 time in total.
Top
User avatar
magick
Site Admin
Posts: 11064
Joined: 2003-05-31T11:32:55-07:00

Re: identify: ... Q16 ... HDRI

Post by magick »

Identify is accurate. The color pixels are float for HDRI, but its depth is still 16, meaning the values typically range from 0 to 65535 but unlike non-HDRI, pixel values are not rounded to unsigned integers.
Top
User avatar
fmw42
Posts: 25562
Joined: 2007-07-02T17:14:51-07:00
Authentication code: 1152
Location: Sunnyvale, California, USA

Re: identify: ... Q16 ... HDRI

Post by fmw42 »

HDRI also means that negative values are allowed.
Top
Post Reply

Return to “Users”