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Author Topic: Attachment Color Test (NT)  (Read 1982 times)
opgr
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« on: January 15, 2013, 12:36:25 PM »
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nt
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Oscar Rysdyk
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Schewe
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« Reply #1 on: January 15, 2013, 01:49:33 PM »
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Yep...they show up. Is there a question?
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opgr
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« Reply #2 on: January 15, 2013, 01:55:59 PM »
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Yep...they show up. Is there a question?

Nope, just testing. There may be a color issue with attachment images, I'm using this thread for testing purposes. Plz ignore, tx.
(nt = no text).
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opgr
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« Reply #3 on: January 15, 2013, 02:23:42 PM »
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opgr
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« Reply #4 on: January 15, 2013, 04:16:09 PM »
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« Last Edit: January 15, 2013, 04:51:18 PM by opgr » Logged

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Oscar Rysdyk
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opgr
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« Reply #5 on: January 31, 2013, 02:59:49 AM »
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Okay, sorry for the bump, but I think we found something.

When I click an attached thumbnail, they sometimes open in a new window. Probably depending on size.

It appears that using Safari on Mac, the image is then sometimes incorrectly interpreted. One particular example shows a rather extensive EXIF data with the colorspace set to "uncalibrated", even though the image has an Adobe RGB profile attached. When the profile is properly honored, the image looks fine. Apparently the EXIF data takes precedence over the attached profile when viewing in a new window (using Safari on Mac).

See this post for an example

Would appreciate it if other people could double check this, thx.
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Tim Lookingbill
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« Reply #6 on: January 31, 2013, 11:14:56 AM »
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Okay, sorry for the bump, but I think we found something.

When I click an attached thumbnail, they sometimes open in a new window. Probably depending on size.

It appears that using Safari on Mac, the image is then sometimes incorrectly interpreted. One particular example shows a rather extensive EXIF data with the colorspace set to "uncalibrated", even though the image has an Adobe RGB profile attached. When the profile is properly honored, the image looks fine. Apparently the EXIF data takes precedence over the attached profile when viewing in a new window (using Safari on Mac).

See this post for an example

Would appreciate it if other people could double check this, thx.

No problems with Safari 5.1.7 on OS 10.6.8.

The thumbnails of your last 3 images of the landscape look the same as the full size although the middle one looks a bit over saturated with a tint of magenta hue shift in warm colors. I dragged and dropped all three full sized versions to my desktop and ran Apple's Colorysync Script "Show Profile Info" and the last entry shows sRGB as the embedded profile on all three.

Added note: All three images have pertinent EXIF data stripped except the sRGB profile.
« Last Edit: January 31, 2013, 11:18:26 AM by tlooknbill » Logged
opgr
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« Reply #7 on: January 31, 2013, 11:26:13 AM »
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No, refer to the post linked here:

http://www.luminous-landscape.com/forum/index.php?topic=28709.msg595563#msg595563

The Hobson Panorama image. If I open that up it shows exactly like having Prophoto RGB attached…
(Cyanish clipped skies, and very red dry grass).
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ErikKaffehr
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« Reply #8 on: January 31, 2013, 12:51:19 PM »
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Maco OS X 10.6.8

Picture #1 (top) diifers. #2 and #3 similar.

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Erik

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opgr
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« Reply #9 on: January 31, 2013, 12:56:39 PM »
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Picture #1 (top) diifers. #2 and #3 similar.

The thumbnails do not appear to be colormanaged, which is the problem here.

But I am not referring to the images in this thread. Instead look at the Hobson Panorama image in the post linked here:

http://www.luminous-landscape.com/forum/index.php?topic=28709.msg595563#msg595563

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Slobodan Blagojevic
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« Reply #10 on: January 31, 2013, 01:04:19 PM »
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... Instead look at the Hobson Panorama image..

Ok, I looked (on Mac 10.6.8., Safari), but what am I supposed to compare it to? I do not see "cyanish clipped skies, and very red dry grass" either.
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opgr
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« Reply #11 on: January 31, 2013, 01:22:05 PM »
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Ok, I looked (on Mac 10.6.8., Safari), but what am I supposed to compare it to? I do not see "cyanish clipped skies, and very red dry grass" either.

It would be immediately obvious if it happens. I see it when I click the image thumbnail and it opens up in a new window. It is totally out-of-whack. (Mac OS X 10.8.2, Safari 6.0.2).

Attached is a comparison, top is the image in safari, bottom is properly colormanaged.
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Slobodan Blagojevic
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« Reply #12 on: January 31, 2013, 01:27:25 PM »
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When I click on the image and it opens up in a new window, it looks like the one on the bottom of your comparison (i.e., looks like properly color managed).

P.S. My versions are 10.6.8 and 5.1.7 for Safari
« Last Edit: January 31, 2013, 01:29:02 PM by Slobodan Blagojevic » Logged

Slobodan

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Tim Lookingbill
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« Reply #13 on: January 31, 2013, 03:22:31 PM »
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Same here with panorama shot as indicated by Slobodan.

Not familiar with your Mac OS version but you might check to see if Safari or some OS Preference setting has color management policies that may or may not expect or default to some profile that's chosen when the image data isn't written to sRGB. Maybe it's assigning your wide gamut display profile or some other color transform preference. Not sure.
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Slobodan Blagojevic
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« Reply #14 on: February 01, 2013, 06:59:01 PM »
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Oscar, I finally saw what you are talking about, but in another thread. You may want to check it, as it contains a possible (and likely) explanation.
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Slobodan

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« Reply #15 on: February 01, 2013, 09:07:27 PM »
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When I click on the image and it opens up in a new window, it looks like the one on the bottom of your comparison (i.e., looks like properly color managed).

P.S. My versions are 10.6.8 and 5.1.7 for Safari
same here
10.8.2, safari 6.0.2
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opgr
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« Reply #16 on: February 01, 2013, 09:35:04 PM »
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Oscar, I finally saw what you are talking about, but in another thread. You may want to check it, as it contains a possible (and likely) explanation.

No, that is just the thumbnail not being colormanaged as already noted above.

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Oscar Rysdyk
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« Reply #17 on: February 01, 2013, 09:42:40 PM »
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same here
10.8.2, safari 6.0.2

Okay, now you have me worried.

This would isolate the issue to something on my system.

My monitor profile is near sRGB-ish, so that doesn't explain the ProPhotoRGB look.

Changing the monitor profile to the sRGB profile still exhibits the issue.

Safari build = (8536.26.17), enable/disable WebGL and cleaning caches makes no difference.
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opgr
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« Reply #18 on: February 01, 2013, 10:09:02 PM »
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Well, that's odd. If i force the image to open in a new tab instead of a new window then the image initially looks reasonable, but as soon as I zoom in or hit refresh in the tab, it goes south.

I noticed previously that there is a distinct render difference half way in the image, see attached. I wouldn't be surprised if the problem is the size of the image in combination with the graphics card. (NVIDIA GeForce 9400M 256 MB).



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