On 08/01/2009 08:37 AM, Martin Nordholts wrote:
> On 08/01/2009 01:05 PM, photocomix wrote:
>>   i never noticed a similar bug, even if i used Gimp to save as copy  
>> thousands
>> of jpeg, and i would never believed this possible, but i have to face
>> evidence
>> to the point image dimensions: 90x116 Size: 547KB
>> And what is really weird is that seems impossible , re-saving from gimp  as
>> jpg reduce the file size...even at quality 1 ( !!) i can't shrink it
> The JPEG has an embedded ICC color profile which GIMP ignores since it's 
> a CMYK profile, but it keeps it around anyway and writes it to the JPEG 
> if you resave it.
> To see the size of the attached color profile, first extract it:
>    $ exiftool -icc_profile -b -w icc lightbulb.jpg
> Then look at how big it (and the image) is:
>    $ du -hb lightbulb.*
> which gives the output
>    557168  lightbulb.icc
>    560484  lightbulb.jpg
> / Martin


Very "enlightening".

In normal use of the program, how would the user known that there was
such an embedded ICC color profile and thus to use the technique you
outlined?   Or is this just one of those "you have to know" kind of

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