Preview.app & Color Profiles?

Okay, I figured this would be the best place to ask this question. Okie, so I have a couple of JPEGs before I switched to the RAW format so I'm pretty sure these have color profiles in them (right clicking, Get Info reveals RGB). However, when I view them in Preview, they look absolutely like crap. When I port them over to Photoshop, it appears just as it should.
HOWEVER, images which are exported using sRGB from Aperture (RAW to JPEG), appear fine in both Preview and Photoshop. So whats going on?

My suspicion is that rendering an image with a small color space (sRGB IEC 61966-2.1) into a wider one should work as there are no constraints. Of course, writing a wide color space (as is Aperture) to a small one such as sRGB or sRGB IEC:blah without on screen proofing it first means you will get all sorts of effects you didn't want. BTW, as far as my understanding goes, sRGB is merely the short-hand of sRGB IEC 61966-2.1 and includes ITU-R BT.709/2 file transformation. Hence the popularity of sRGB.
This (if I understood the initial q.) begs a q. as to why you see differences between an sRGB and an sRGB IEC blah profile of course.
sRGB was defined by HP and MSFT, the adopted by W3C, Pantone etc. as the standard for color rendition on "typical" 1996 color CRT monitors. These CRT's had restricted ability to present color accurately in office lighting conditions, and so the color space is very restricted. Additionally, since it focused on CRT's, it has a way curvaceous gamma curve (to map CRT luminance at different black levels to a perceived linear brightness by Mk 1 eyeballs) which is why it throws contrasts off so much on LCD's.
Light-hearted reading for insomniacs at ...
http://www.srgb.com/srgboverview/index.htm

Similar Messages

Preview: colour (color) profile conversion

The colour profile of my camera (a Nikon SLR) is usually set to Adobe RGB (1998). Recently I reset it to sRGB by mistake and took some photos, which I therefore wanted to convert to Adobe RGB. I did so with three different applications: Preview, Photoshop and GraphicConverter. The results seemed inconsistent, so I conducted the following little experiment.
1. I photographed something with my camera set to Adobe RGB (1998): image 'A'.
2. I immediately photographed the same objects with the camera set to sRGB, ensuring that lighting conditions were the same as before.
3. I converted the sRGB image to Adobe RGB (1998) three times, using the three applications listed above: images 'A-Pr', 'A-Ph', 'A-Gr'.
4. I viewed all four images in the same application and on the same display, so as to eliminate differences in the characteristics of different applications and displays.
Regarding 'A' as the standard for comparison, 'A-Ph' appeared virtually identical to it. 'A-Pr' and 'A-Gr' were very similar, and both were noticeably more red than 'A'. I have reported this to the originator of GraphicConverter and he is looking into it as far as that application is concerned. But this also seems to be a problem with Preview, and I should welcome explanations. Can this be put right?

I am now in correspondence with the originator of one of the programs that I used in this experiment. I haven't got a full answer yet, but it obviously isn't an Apple problem, so I shall regard this question as answered.

AdobeRGB treated as UNKNOWN color profile

Hi all.
My digital camera jpeg image that have AdobeRGB color profile,
that appears as color shifted on monitor.
in Aperture 3.1.3 metadata tab , that treated as UNKNOWN color profile.
also in preview.app , color shift are happend.
and need manually set AdobeRGB to collect color
10.6.8 and Aperture 3.1.3 works collectful
10.7.0 and Aperture 3.1.3 unknown color profile.
is this bug?
is there any person like this?

Hi all.
My digital camera jpeg image that have AdobeRGB color profile,
that appears as color shifted on monitor.
in Aperture 3.1.3 metadata tab , that treated as UNKNOWN color profile.
also in preview.app , color shift are happend.
and need manually set AdobeRGB to collect color
10.6.8 and Aperture 3.1.3 works collectful
10.7.0 and Aperture 3.1.3 unknown color profile.
is this bug?
is there any person like this?

Memory Leak in Preview.app when switching Display Profiles

I found a weird memory leak in Max OS X Preview.app, which manifests itself when Display profiles (color calbration) is change. I wonder if anyone else can reproduce my experience.
1. Open up "System Preferences" -> "Displays", switch to the "Color" tab. You'll need at least 2 available profiles in the list. (If you only have 1, you can create another using "Calibrate..." button to launch Display Calibration Assistant.
2. Open an image file in Preview.app. The larger, the better. Zoom in full size to maximize the effect of the bug. I repro'ed easily with this image: http://www.donporter.net/NewSchool/Color/Examples/Printer%20Test%20file.jpg
3. Open up "Activity Monitor.app", and click on Preview to highlight it, so you can watch its memory usage.
4. Switch back to "Diplays" Preference Pane. Using the arrow keys, toggle up and down between two different Display profiles.
4a. At the same time, watch Preview's "Real Mem" in Activity Monitor, as well as the total "Active" memory.
5. Each time you switch profiles, Preview consumes more Active/Real memory, about 25MB per switch in my case. This continues until all physical memory is consumed, and then (I presume) starts swapping virtual memory to disk.
6. Bring Preview to foreground, and all the profile-induced memory usage is freed.
Weird, wild stuff.

Could it be possible that this is just the OS holding the memory for the app until another process requires it? Do you find that the memory increase eventually causes the app to become unstable?
It might be best to open a new bug report on this over at bugbase.adobe.com. When adding the bug, please include any source code, project or installer that will help us reproduce the issue internally. If you'd like to keep your code private, feel free to email it directly to [email protected] Once entered, please post back with the URL so that others effected can add their comments and votes.
Thanks,
Chris

Bad ramifications of color profile used in previews

It seems that Aperture's choice of color profile for its previews has some rather wide implications. In a RAW workflow, previews are assigned an Adobe RGB profile. In a JPG workflow, previews aren't generated at all at first (which makes sense - no need to create a JPG from a JPG), but they are created once you edit a photo. Then once again, the preview is assigned an Adobe RGB profile, irrespective of the color profile of the original photo. This all kind of makes sense. Presumably, Adobe RGB is the same as, or close to, the color profile Aperure uses internally.
The problem comes when photos are "shared". With the Aperture preference set to "Share previews with iLife and iWork", Aperture generates an XML file that can be used by external programs. This XML file points the external program at the previews (or the original in the case of an unedited JPG). Then photos can be picked up in various places:
* In mail.app via the Photo Browser.
* In any app via the Media section in Finder.
* On an Apple TV via the "Choose photos to share" option in iTunes.
BUT - all these photos (with the exception of an unedited JPG) will ALWAYS have an Adobe RGB profile. This is generally not good, since the photos will display badly in any app that isn't color managed. Unfortunately, this seems to apply to Apple TV. Photos there have the typically subdued look of Adobe RGB when not color managed. The situation actually gets worse with JPGs. An unedited JPG which originally had an sRGB profile will display fine, but as soon as you edit that photo in Aperture, it willl display badly because now iTunes/Apple TV is working with an Adobe RGB profile. I've done tests and it's painfully obvious.
Anyone else come across this? I'm not sure what can be done. Maybe having an option to generate proviews using sRGB would be good, but that might involve too much processing in Aperture when it's continually generating previews as you edit.
Thoughts appreciated!

The export settings don't have any effect on the problem, unfortunately. What preference are you referring to? Do you mean the Import "tab" in Aperture prefs? That just governs what Aperture uses for its initial preview. it will now, by default, use the preview that is embedded in every RAW file to speed up processing. As soon as you look at the photo, even without editing it, it will then generate its own JPG preview (with Adobe RGB profile).
I haven't received any other feedback about this problem anywhere, which is surprising to me. I think I can only post the problem through Apple feedback, and hope for the best. It seems that, in the meantime, the only course of action is to export everything you need to display properly on an AppleTV, and re-import those JPGs into Aperture (or iPhoto) so they can be displayed via iTunes. A royal pain!

How to change highlight color of PDF texts to the standard golden yellow on Preview app?

I use the Preview app to read my PDF books. I also read these same books on my iPad. When I read my books, I like to highlight the text. I'm used to highlight my text with the standard golden yellow on my iPad. When I use Preview, the only choice of yellow color I've found is a somewhat orange yellow that's called "yellow". Besides that, I see only 5 highlight options. Anyway, I'd like to highlight my text on Preview with the standard golden yellow, the same color that is available in almost all PDF editing apps. Anyway, how can I highlight my pdf texts with the standard golden yellow on the Mac Preview app?!

Here is a picture to show the difference between the standard golden yellow (above) and the mac preview called yellow (below - looks like orange to me).
Is there a way to highlight the pdf texts on Preview app in the golden yellow color, shown above?

Preview.app -- tools -- adjust color = crash

I noticed that if I open anyfile.jpg with preview.app, and select the 'tools' tab, then 'adjust color' and drag the slider a little, it will crash, every time.
Mac 10.5.1, Preview.app Version 4.0 (469), reproducable = 100%.
I didn't find a similar bug

This sounds like an issue of an upgrade over tiger.
When a upgrade is done leopard is neatly overlaid over tiger and all existing extensions, plugins, etc. are preserved.
That does not mean that the plugins and extensions are compatible with the new OS.
If the overlay does not work you likely have an incompatible extension, plugin or system modification software installed.
The simplest cure is to do an archive and install, preserving user and network settings.
This allows for a new os to be laid down with no additional plugins or extensions installed.
You can then test the system after a software update.
At this point the problem should be gone.
You will need to reinstall any applications that are not drag and drop.
This should now be done slowly.
Reinstall an application, apply any updates and test.
Add applications into the system slowly making sure that if one brings a problem into the system that you can know that the program is the source of the problem.
Its a good idea before installing an application to know how to remove it if it turns out to be a problem.
Remember that applications that were released under a particular OS were not written for any OS other than that OS.
One more point. Leopard was meant to overlay Tiger.
If you start with an older OS you need to perform an archive and install because Leopard will not neatly overlay anything other than Tiger.
In fact, the installer will likely not give you the option to upgrade.

Preview Color Profile Info

I know it's got to be there but I cannot find a way to show the embedded color profile information in Lightroom. I tried LIbrary View Options and Prefernces. Also tried a search in the Help area as well as as search in this forum.
Can someone help? :-)
Linda

Phil,
If I understand you right, yes. I'll say it back to make sure.
I start by processing all my images and often do additional enhancements in Photoshop, all in the Adobe RGB color space. Once I'm done with the core processing, I then will have different folders with different images and their profiles.
One will be a folder of web images in the sRGB colors space. Another folder will contain images with a particular printer profile that is embedded for output. If I use my own printer they will contain the Canon i9900 profile. If it's an outside printer the images will have that printer's profile.
When I open images in Lightroom I want to know if Lightroom is giving me a preview that is consistent with the embedded profile.
I also would like to be able to have the option to see what profile is embedded.
Hope that helps clarify. I'm a little sleep deprived lately.

Cover Flow, Quick Look and Finder icons ignore ICC color profiles

... and that really bothers me!
As a photographer, I tend to save photos with different color profiles embedded in them. Sometimes it's Adobe RGB, sometimes sRGB, sometimes Generic RGB (don't ask).
Aside from the apps that HAVE TO regard color profiles (Aperture, Photoshop etc), I was under the impression that color consistency is important throughout OS X. I am satisfied that Safari and Preview fully support color profiles, and that is why I am appalled that Cover Flow and Quick Look (my favorite feature in Leopard) do not! How do I know? It's in the plain eye sight.
Apple... FIX THIS, PLEASE!
Message was edited by: Daniel Kasaj - reason: I forgot to say "please"!

If it's an issue that you feel needs their attention, I'd submit feedback to Apple directly, as they have no employees dedicated to reading these forums. Go to http://www.apple.com/feedback/macosx.html/ to send your request.

Preview App printing problem

Running 10.6.8 on a Quad-Core PowerMac with Canon IP2600 printer via USB.
Thought I was running out of ink at first, but a closer look shows documents printed from Preview.app are printing only outlines of black characters and black graphics as if everything is in an outline font. At first it was the lower 2/3rds of the page, then 3/4s, now it's the entire page printing black in faint outlines only, very precise (while color logos print normally).
These docs are PNGs. The same PNG prints perfectly in Photoshop. So I created a doc in Photoshop with two thick, solid, vertical black lines; saved and printed as a PNG and as a JPEG, both print fine in Photoshop. When opened and printed in Preview, both print as a series of very thin rectangular outlines running down the page.
Started happening out of the blue a few days ago, so I trashed three Preview pref files (showing recent modification dates), restarted and nothing changed. Do I need to reinstall the app? Can't think of any recent changes that might've affected Preview or the printer, no updates or installs in the past few weeks. Preview displays onscreen as it's supposed to.....
Anybody have a clue what's going on here? The only other Preview.app printing problem I can find has to do with printer color profiles.....
Thank you for any suggestions, I'm stumped!
Mike

Well..... duh!
The real mystery is why docs in Photoshop continued printing long after Preview had quit printing those SAME docs. Photoshop never did fail to print - but a new ink tank/print head solved the problem.
Good thing ya can't LOSE points for asking stupid questions, huh.
D'oh!

Macbook Color Profile Question

I just bought a Macbook from my cousin yesterday. It's in great shape and not very old, which is why I bought it. It's amazing how addictive it is, I've been PC person forever.
I immediately brought it home and installed all my programs, set a desktop photo, and opened photoshop. The coloring on my photos is off. I've tried using Supercal, and calibrating using the tool in the profiles, but I can't figure this out for anything. Being new to MAC, I'm just confused---
I use Firefox for my browser. The colors are perfect in it. When I change my profile and get it to somewhat make my photos look right (or like they did in my PC. All the photos seem to have like an orangey-yellowish look to them, not majorly, but editing photos isn't going to work with it like that.), then I open Firefox and my coloring is completely off on websites.
Does anyone have any suggestions? I would greatly appreciate it.
Thanks in advance!

in short, photos can contain their own ICC (color profile). And this effects how color look on a per photo basis. instead of modifying your display color profile you need to a just or change just color profile of the photo(s) to have them render properly.
One way to tell what color profile need to be altered is to get info on that photo. you can do this in the finder, preview, photoshop. you can also use these applications to change witch ICC is used on a photo.
these apps use ICC color profiles : safari, quick time, preview, finder, quick look, photoshop
firefox dose not use the ICC color profiles attached to photos, but you can tell it to in firefox preferences. when ICC color profiles is off in firefox it's going to use the default color calibration in system preferences display
this website dose a great, but confusing job of comparing different ICC profiles. http://www.gballard.net/psd/golive_pageprofile/embeddedJPEGprofiles.html
if you want to become an expert in color management you may want to check out: http://support.apple.com/kb/HT3712 . it also talks about how you can use preview to change what ICC is used with a photo.
Message was edited by: Sherman Campbell

Preview application color management

Print with preview from a psd document letting PS determine colors to Epson R2400, preview shows washed out or wrong colors. Is Tiger's preview app useless once you let PS determine color?
G5 2.3 2.5RAM/PowerBkG41.67 1.5RAM Mac OS X (10.4.8) Aperture1.5.2

Totally in agreement! Your frestration is clear and I hope I'm not clogging up your thread with my "contributions". Trouble for me is that I don't have confidence that my printer or display profiles ARE setup properly. I have swapped colour mgmt seetings so often now that I'm probably cancelling out profiling at both ends. Think Chinese translated to Albanian, to French, and output English!!! Problem also that PhotoShop profiles label standard differently than HP. "CYMK", for example, has no counterpart in the HP printer settings! What to use? ICM, Application Managed???
I continue searching for a solutuion & came across this site http://www.ocad.ca/about_ocad/technology_media/sb/printing_help/color.htm . Based on this info, and translating to my application, I am getting a bit closer. At least the printer is now "paying attention" and actually printing something other than "whatever it feels like".
Now that I've got colours close to matching (WYSIWYG), it is apparent that I do, in fact, have some issues with my LCD monitor brightness/contrast settings. I am now working through that and hoping I don't need to go to the expense of buying a Spyder calibration tool. I DON'T make a living at this and would prefer to spend my hard earned $ on glass/equipment to improve quality at the front end. Photos from Costco will be here in about hour...

PREVIEW APP VS ADOBE ACROBAT

I have asked this question before but the phrasing just wasnt quite right.
Anyone besides
Linc Davis
please feel free to answer
Trying to figure out as to why viewing a PDF in the Prview APP in Mountain Lion and viewing the same PDF in ACROBAT colors are different. In Snow Leopard it is the same.
Anyone else notice this?

VikingOSX Please read..Im talking about the end user. Im in Austin Texas, and my client could be in Nebraska. I cant control what and how they view it, but if they are on a mac and in ML, and viewing in PREVIEW and not ACROBAT, colors tend te be different. NOT ALWAYS, and thats what I cant figure out...
VikingOSX wrote:
Joel Phillips wrote:
I have asked this question before but the phrasing just wasnt quite right.
Anyone besides
Linc Davis
please feel free to answer
Trying to figure out as to why viewing a PDF in the Prview APP in Mountain Lion and viewing the same PDF in ACROBAT colors are different. In Snow Leopard it is the same.
Anyone else notice this?
Assumption: Using Acrobat 10.1.4 (latest ML compatibility update).
Once your work is displayed in Preview, have you asked it to use the same "Color Sync" calibration profile as you use in Acrobat? Does your frustration stem from already performing this step and a color registration disparity remains?
Preview > Tools > Assign Profile... choose same color profile.

Aperture 3 embedded color profile bug still unsolved (worked in Ap 2)

RE: Aperture 3.x cannot display images with certain color profiles embedded. This bug was reported
on March 11, but is still unsolved and basically makes Aperture 3 unusable for my large collection
of scanned slides which have a special color profile embedded. Viewer and sometimes Browser turns
either black or go haywire.
What is it about:
When you scan slides with a scanner, you can generate a special color profile so that the image
looks good and you can then embed this profile in the scanned tiff and jpeg images. Most pro applications honor the embedded profile and display the image correctly. In our case, we
generated a special profile named Nikon-LS5000 (it was tested for correctness!):
1) It worked fine in Aperture 2.x
2) It never worked in Aperture 3.x
3) It does not depend on the Operating System (i.e, the bug manifests itself in 10.6.2, 10.6.3 and now in 10.6.4)
4) It is no question of a special Mac Model (the bug shows on iMacs, ibook profs, and iMacs 2010)
5) It is irrelevant whether you start Aperture 3 in 32-bit or 64-bit mode
6) It shows with jpegs or tiffs, no matter
7) Preview.app or Photoshop CS4 display the images correctly!
8) If one changes the embedded profile via PS CS4 to sRGB or ProPhoto, Aperture 3 works (but the
image then has radically different colors - so no solution!)
9) The conclusion is that something affecting the processing of (some?) embedded color profiles has radically changed from Aperture 2 to Aperture 3.
I put a few jpegs with embedded color profiles and screenshots of how Aperture 3 behaves on the Picasa web:
http://picasaweb.google.com/114939413495021552399/TestapertureBilder#
you are invited to download the jpeg- images and retry in your ownAperture 3 Library.
Maybe together we can find out what causes this bug which is very annoying for any
serious photographer.

I have put the test material on another server - you can download a
zipped folder (Aperture3profilebug.zip) of all test images AND the color profile from
https://depot.uni-konstanz.de/get/txau69
with any browser. (The problem was that the Picasa Software seems to strip the color profiles from
the test images, so I had to put them on another server. It will remain there until July 1).
Regards and thanks for helping

Which color profile to work with

hi,
since recent i'm working with linux open source software for my DTP, which has been posing some problems, especially concerning my colors. This has nothing to do with Linux but with the fact that i don't know a lot about color management (though do find it interesting)
I have a hard time understanding (visualizing) the actual workflow of color management.
What i understand so far: When i import an image in my DTP software (Scribus), that image may have an embedded color profile (RGB) or may not. When it doesn't, the software assigns a profile to it, through the color engine (Litlle CMS). I assume it does this automatically? Otherwise I am able to assign my own profile to it, directly in Scribus. But what color profile do i assign when i export to PDF, to send off for printing? What is important to take into account regarding the commercial printer?
I've calibrated my screen using the Spyder 2 Express software, and the software has created an .icm profile for that screen. This .icm profile is automatically installed in the directory and thus also in Scribus. But when i assign this profile to my file and i export to PDF, does my commercial printer on the other side of town recognize this profile? Shouldn't i be exporting in a standard ICC profile, like Adobe RGB(1998)?
This is the part where it's hard for me to understand what to do with the profile my Spyder has created.
My sole objective however is to see on my screen as exactly possible as what comes out of the printer on the other side of town.
Thank you for your help.
Bart

borisbastoss wrote:
But what color profile do i assign when i export to PDF, to send off for printing? What is important to take into account regarding the commercial printer?
Just to be clear, in a properly color managed workflow, you do not assign at the PDF export stage. You would either preserve all profiles, or convert to a destination profile. The term assign would lead some to believe there is false profiling going on but I realize that is not what you meant.
You must contact the commercial printer to find out whether to convert to his destination color, or instead perform no color conversion and preserve your current source color spaces.
Hopefully he can provide you with a destination ICC profile which fully describes the print condition. In that case, you can convert to this color space when you export. After PDF creation you can view the destination color with an ICC compliant PDF reader to soft proof the print result.
I am not familiar with the applications you have mentioned. Adobe apps have a way of previewing destination color while still in the source space. It is called Proof Setup. You may or may not posses a tool like this. If you do you may be able to soft proof before PDF creation.
Also I am not sure if you are using Adobe Acrobat to view your PDF output. Whatever you use, it needs to honor ICC profiles to render accurate soft proofs.
As already mentioned, your monitor profile is for your soft proofing purposes only. It is not a source color space or a destination color space, and should have no involvement in PDF output.
borisbastoss wrote:
My sole objective however is to see on my screen as exactly possible as what comes out of the printer on the other side of town.
It can be difficult to get an extremely accurate soft proof. You need the destination ICC profile, and the proper tools for your display to translate this color space for you to see. If your printer is using the SWOP (Specifications for Web Offset Printing) standard or GRACoL, then there are ICC profiles you can download from the IdeAlliance website:
http://www.idealliance.org/industry_resources/branding_media_and_color/g7
Bear in mind, if the printer specifically tells you not to convert and to include all source profiles, this is called a late binding workflow (relatively rare). Late binding is progressive, but the problem is that you can't soft proof in the print color space. Even though the idea behind any color conversion is to preserve appearance, there are many source RGB colors that cannot be reproduced in print (referred to as out of gamut colors). Examples are vibrant blues, greens, oranges, and violets. You probably won't encounter a late binding printer, but without a destination ICC you just have to trust him to do the best possible conversion to move the job to his output device, whatever it may be.

Preview.app & Color Profiles?

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