Re: Color management

Fr=E9d=E9ric wrote:
> On Friday 29 December 2006 22:45, John Ellis wrote:
> =

>> The inputs 1 to 4 are custom profiles you can use for the image, they
>> are empty and not selectable until you assign a color profile to an
>> input in preferences. Under the advanced tab, scroll down to "Color
>> profiles", the file entry must point to a valid .icc Color Profile to be
>> enabled in the menu.
>>
>> Images from the internet for display on a web page, and most consumer
>> level digital cameras will use the sRGB color profile - no .icc file is
>> needed.
>>
>> The custom inputs are for when you have a color profile for the source
>> of the image (scanner, camera, etc.). If the device does not use the
>> default sRGB profile, then an .icc color profile is usually supplied
>> with the device drivers that came with the device.
>>
>> "Use profile from image" should be enabled so that if an image contains
>> an embedded profile it will be used instead of the one you chose as the
>> default input.
> =

> Ok, I think I have understood.
> =

>> Changing any option in the color profile menu will automatically reload
>> the image. Note that the color adjustment function takes time and is
>> calculated after the image is completely loaded, so for larger images
>> there will be a noticeable delay between when the image is first loaded
>> and the color adjusted image is drawn.
>>
>> If the image is in sRGB colorspace (or you select sRGB as the input) and
>> your monitor is also set to sRGB there will be no change as they are the
>> same. Additionally, if either the input or screen .icc file(s) you
>> selected in the preferences window is corrupt or missing, color
>> profiling can not function and will not be applied to the image.
> =

> Is there any log somewhere to see if this is a profile problem? Because I =

> can't see anything... I use a profile generated by Argyllcms.

Run gqview with the --debug command line option, you will then get an error =

on the terminal if there is a problem loading an .icc color profile.


Greetings,
John

-- =

John Ellis <[email protected]>

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