Uneven brightness

I am using an image for floor in a 3D model. In the render you can see the repeating pattern of uneven brightness from 1 side to the other. Is there a technique that will even out the brightness across the image left to right or up and down. Thanks.

figured it out.
copy the image on top of itself.
add a adj layer - brightness
lower the brightness
add a gradient to a layer mask that revels only the right half.
viola.

Similar Messages

Uneven brightness in my macbook

I have a macbook with uneven brightness display. Strangely, the right quarter of the display is not as bright as the right. The unevenness is noticeable and I cannot bear it after a relative long time of work before it. I have tried with different brightness setting, no work.
I don't know how to solve this problem.
Two weeks ago, I have call the local apple service, they refused to replace the display for me. How can I solve this problem ?
Macbook Mac OS X (10.4.7) Macbook/MA254

Sorry... it resolved my uneven brightness problem. I was hoping it would do the same for you. Mine was actually dim in both lower corners but it is now perfect after doing the advanced calibrate.
Can you take it to an Apple store so you can "show" someone the problem? If not, I can see how this is going to be tough to get repaired over the phone.
Sorry, I hope someone else chimes in here with a suggestion.
Greg

HT1430 My new iPAD3 has uneven brightness on screen. Left half is brighter than right half. Any suggestions how to fix it?

My new iPAD has uneven brightness on screen. Left half is much brighter than right half. Any suggetions to fix it or shall I go for warranty replacement?

If restarting or rebooting doesn't resolve the issue and the device is new, I would contact Apple or wherever you bought the iPad, show it to them and if they can't figure out, ask for a replacement.
Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
Reboot the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.

15" C2D uneven brightness

So...
I've had the MBP since Monday and I've been noticing that there is some uneven brightness on the screen. There are two areas specifically: Right side (about 1cm along the edge) and bottom (about 2cm tall, about 4cm above the edge.) Both of these tend to fix themselves if I contort my viewing position, but at a normal viewing position (i.e. what I used with the old powerbook, I see the variations.)
Anyone else see something like this?

Charles Conway reports the same issue on a glossy model here: http://discussions.apple.com/thread.jspa?threadID=714909&tstart=0

Display brightness diagnostic apps for uneven brightness

hi forum,
switching from a MB, it seems that the brightness of the display on my MBP is kind of spotty (or not distributed evenly). i've read that it's quite common on the PB and MBP.
as much as i trust my naked eye, is there any apps to diagnose/verify this issue? will apple replace my MBP since it was purchased less than a week ago?
thanx in advance.

There is a program called LCDTest that has some gray screens in it under the Pixel test section. I think a full gray screen is one of the best ways to view non-uniformity.
http://www.versiontracker.com/dyn/moreinfo/macosx/23237

Uneven brightness + washed out colours

I got a new iBook G4 12in a week ago. Love everything about it apart from the screen. As soon as I booted it for the first time I noticed the screen wasn't particularly bright and that the colours were washed out. It's usable but not of a level I'd expect from Apple. It's bad even under standard office fluorescent lighting.
A colleague with an identical iBook noticed my screen was a bit dim and said he usually runs his iBook at a low brightness level (two notches off bottom). If I did that on mine, I'd struggle to see anything! It has to be run at full or just below full brightness to be usable.
I've also noticed that the bottom of the screen is brighter than the top. This took me a week to notice so isn't a huge problem. At the bottom corners there are very light streaks - it's a bit like the screen is being run from two halogen spotlights placed underneath the plastic surround!
Should I phone Apple's support and get this fixed, or is it to be expected? Research online shows half the people have a similar problem with washed out colours, while half claim their screens are bright and vibrant.

I called AppleCare last night. First, the guy asked me to do a couple of adjustments. He suspected that the display was damp. So he asked me to turn off the system, take out the battery, and then discharge the whole machine completely by pressing Shift, Ctrl, Alt, and the power button at the same time. But this trick didn't solve the problem. Second, he asked me to put the installer cd in and adjust something. It didn't work either. After this, he got me a system engineer on the phone, and he said there were two options: I could either send it in for repair, which would be quicker, or exchange it for a new unit, which would be slower, about 10-12 days. So I decided to exchange it for a new one. They are sending me the packing labels. Then I will send this one back. They will send a new one to me.
I suspect that displays with such problems are recycled ones. I mean they are taken from junk ones with an okay display. I hope this is not true. The display on my three-year-old Compaq still looks better than this one.
Apart from this small defect, my new computer works really well, and I love it. I am just a little disappointed with the product quality of Apple computers. It seems that they have put a lot of effort in the design of the appearance of their computers. But there is some degree of negligience on other aspects of their computers. That's why this forum is full of complaints.
Personally I think it is better to buy a computer directly in a store. It is easier to return or get a new one.

30" uneven brightness, shows as a dark band

Hi everyone,
I had a perfect 30" Cinema Display. Lately it started to show a dark horizontal band which starts at the middle left and extends to nearly 75% of the display's width. It's clearly the backlight which is causing this and after a while of use it normally gets a little brighter and therefore less noticable. This behaviour started only a few days ago and before that the backlight was relatively even.
Since it's only a few months old, it's still under warranty, but I know that the whole display will get exchanged for another (often not really "new") one. Mine has not a single dead or stuck pixel and I fear that if I take it to an Apple Dealer to get it exchanged, I might get one with even backlight but maybe dead pixels.
Is there any way to make sure to only get a replacement which has no dead pixels? Mine has none and I do not want to get a replacement that's not as good just because of my backlight issue...
Any help or ideas are appreciated!
Thanks
Björn
PowerBook G4 Mac OS X (10.4.3) 30" ACD

I have exactly this same problem.
I purchased ACD 30" from Apple.com (online) early December 2005. Only one dead pixel and backlighting was very even and no dancing green pixels. I use it with a PC (using the ATI Radeon 9600 Pro PC & Mac Edition).
Then, suddenly about a week ago, a dark area developed. It starts on the left of the screen, is about 3 inches tall, and then extends to the right a little over half the screen, gradually tapering off.
It's a fuzzy, darkish area, ie not with hard boundaries, but very noticeable (most of my windows have white backgrounds). It just looks like the area is dirty (yes I've tried washing it!).
The area starts quite dark and then gets somewhat lighter the longer the display is on, but never goes away, not even close.
I run the display at minimum brightness (I work in the dark!), but even when I turn it up to max brightness, the area gets brighter, but is still dimmer than the rest of the display (which is otherwise very even).
Is this just that the backlight has a certain area that's dim or partially burned out? Are there multiple backlights on this display? Or a single one (w/ spreaders) running along the left edge maybe?

Uneven Brightness (new 17" Hi-Res Glossy Penryn MBP)

Finally got the new Penryn MBP I ordered the day they came out, and it seems to be working fine, but the only "issue" I see is the back light seems uneven. Its only noticeable on a white/light color solid background. Just wondering how common this is. I had to wait almost 3 weeks to get it, so I assume the wait would be just as long or longer to get it fixed. Just a bit of a let down, especially after having to wait 3 weeks for it.

Obviously, quality control is something Apple feels it can afford to do without, as they are usually quick to replace these defective products at the counter.
This statement is blatantly false. Granted lemons do slip through the cracks, and sometimes it is impossible to make a system crackproof when dealing with so many products. Just a single 128 MB RAM board has one billion parts. That's as many as the Saturn V Rocket! Apple's sales of notebooks have gone through the roof, and if you do get something in warranty that obviously needs repair, do use the warranty to take care of it.
Opened a second 2.4 15 Inch Penryn and found the LED on this one had a gradient that darkened on the far right. They
Disassembling the machine as you have done basically exposes the machine to static electricity and other problems, and frequently is noticeable because of the difficulty of reassembly. I would let the warranty people take care of it, or the store return policy take care of it.
Apple's quality still is the best in the industry, if you read Consumer Reports.
So don't let the preponderance of issues reported on this board make you think they all have issues. Quite the contrary many without problems never have reason to report here.
If you have a specific problem, please start a new topic thread here:
http://discussions.apple.com/forum.jspa?forumID=1150&start=0
If you don't have anything else to contribute to the original user in the thread.

Are all Imac screens unevenly bright, or just faulty batch?

Can anyone confirm that they have a 24" Imac that has a uniformly bright screen, i.e. when scrutinizing it with a solid grey or white background, you cannot see any areas of the screen that are noticeably brighter than the others?
I really want to buy a 24" Imac, but having tried two that had an unacceptable brightness gradient from left to right, and having been told by the Apple Store owner that their display model also has the same ueneveness, plus having read the many posts on this board about the same issue, I am beginning to think that perhaps all the new Imac screens have this problem.
I'd appreciate it if anyone who owns a 24" alu Imac with a good screen could post in this thread.
Many thanks!

Im surprised mrtotes can't see any gradient problems on his Alu iMac! There are VERY few people reporting that their 20" or 24" iMac doesn't have a gradient issue.
From other iMac customers, including those on these forums, it seems that it is not necessarily a faulty batch, but a range-wide issue. Whether Apple decides to provide a fix for current iMacs and/or produces new batches without the issue, is simply unknown at present.
I have also read that Apple's response is that the iMac is designed for consumer-level customers and not for professionals. Professionals including graphic designers like myself will likely disagree with this. I am at a graphic design degree course at the moment and my lecturers also disagree with this statement (Especially seeing as all our workstations at university are previous generation iMacs!). The iMacs are definitely acceptable, and probably excellent for non-professional use, but if you're interested in correct colour and brightness levels for things such as design work, then the current generation iMac is now unfortunately not suitable for this sort of professional use.
I am not providing any facts here, just gathered information. I am awaiting a replacement for my 20" Alu iMac but I am certainly not expecting it to be any different.

Uneven brightness/contrast with new iMac 20" display

Yesterday I rec'd a new Core 2 Duo 20" iMac and there is a major issue with the screen. At the bottom, its contrast and brightness are fine, but at the top it has gradually lost its brightness and contrast. The menu bar looks "dingy". Is this a software (settings) issue or a defective LCD? My iMac G5 20" does not have this problem.
Thanks,
Tony

It seems I have a similar problem (http://discussions.apple.com/thread.jspa?threadID=678070&tstart=0), but I bought mi iMac online, on the Apple Store.
Should contact Apple by phone? And... then?
Thanx

Uneven brightness on the edge of right screen

Anyone notices? Is my screen defected????

what are you seeing?
what theme are you using?
can you post a screen shot?

Brightness incosistency on 24' imac screen

okay i got my 24" imac this week and fired it up last night. today i noticed somethingthat kind of bothers me. on the left hand side of the screen, everything is brighter. toward the middle, it seems to be a little darker and on the left hand side, the right 1/3 of the screen is slightly darker. any problems with this? am i going to have to send this bad boy in? it is i would say 5-7 % darker than the rest of the screen. any suggestions welcome! thank you! is there any kind of demagnitizing reset button like on some pc monitors?
luke black

Hi Al,
Thank you for taking the time to write and offer advice. I already have taken it back and Apple told me it was within their specs. I am definitely returning this unit; the only question is whether it will be for exchange or refund. If all 24" iMacs look this way, then I won't bother exchanging it. That's why I would like to see photos of other people's screens, if possible, to see if I detect similar issues.
The screen shot I posted is an actual photo. As I mentioned, I have adjusted the brightness and contrast of the photo in Photoshop to make the variation more easily recognizable; but these color and brightness variations are readily visible to me under my normal working conditions (which is what prompted me to take the photo in the first place). I also recognize that since I am a graphics professional, I may be more aware and less tolerant of display problems than more casual users. I think my current 20" (non-Apple) screen looks quite good, so I know it's possible to have a good LCD. I just don't know if the 24" iMac is capable of this performance by design.
Best Regards,
- Michael
24" iMac, 2.16 GHz Mac OS X (10.4.8) Screen is too bright, has uneven brightness left-to-right, and hums when dimmed.

Screen unequal bright

My ibook is just over 12 month old and I noticed recently that the screen in not equal bright. It looks that all backlight is coming from the right left corner and substantial less from the right. It looks like a dark cloud is hanging over the left part of the screen. Would this be consistant with a display fault ?. I appreciate any thoughts.

I would take it into a service shop to have it checked out.
My iBook screen has uneven brightness, with lighter blotches in the centre as well as darker areas. I took it to a shop today and was told this is not normal. Apple will be replacing the display under warranty.

Dark "waves" on 24" iMac Screen

I'm having problems with the screen on my 24" iMac. Over the last couple of weeks I'm noticing dark areas on my screen in random "wave" type patterns. Here's what it looks like:
http://img140.imageshack.us/img140/2918/picture2ya.png
You can't see them when the background is white. But it is very visible otherwise. I tried changing the screen saver to all white and cleaning the vents (saw that on a previous post), but nothing seems to work. I'm beginning to worry I have a significant problem. Any ideas? Thanks.

Hi Al,
Thank you for taking the time to write and offer advice. I already have taken it back and Apple told me it was within their specs. I am definitely returning this unit; the only question is whether it will be for exchange or refund. If all 24" iMacs look this way, then I won't bother exchanging it. That's why I would like to see photos of other people's screens, if possible, to see if I detect similar issues.
The screen shot I posted is an actual photo. As I mentioned, I have adjusted the brightness and contrast of the photo in Photoshop to make the variation more easily recognizable; but these color and brightness variations are readily visible to me under my normal working conditions (which is what prompted me to take the photo in the first place). I also recognize that since I am a graphics professional, I may be more aware and less tolerant of display problems than more casual users. I think my current 20" (non-Apple) screen looks quite good, so I know it's possible to have a good LCD. I just don't know if the 24" iMac is capable of this performance by design.
Best Regards,
- Michael
24" iMac, 2.16 GHz Mac OS X (10.4.8) Screen is too bright, has uneven brightness left-to-right, and hums when dimmed.

Yellow tint! the 3rd Screen of my iMac 27, it's getting worse and worse...

Hi everyone not sure if there is anything more i could do with this, I have a 2010-13 week iMac, it came with a 'bearable' yellow tint problem from the beginning, after a hard drive failure i had to send my iMac back to Apple care, i was hoping the screen problem had been solved so I asked them to replace my screen as well, it came back with a worse panel showed much larger area of yellow tint...
Then I decided to wait for a few months until a week ago before my holiday i called for another exchange, was hoping for a perfect screen after my holiday, now holiday is over and iMac is back, just right after I pressed the power button, the start up screen with apple logo clearly tells me that i have got a even more disgusting panel - the worst of all i have to say, a new uneven shadow line on the bottom plus the usual yellower tint spreads over the middle of the screen, oh yes, they decided to make it even worse, a big dead spot as well in the corner ....
after a few hours, when i was editing a photo in Aperture, I have discovered something even more disturbing, from right edge of the screen inwards there is around 8cm wide vertical band shows obvious brighter tone than the rest of screen...
I do a lot of black & white photography plus a lot 3D graphic work, for a while I had tried to live with the yellow issue until it got really frustrating - now i have to once again arrange an exchange as this one is just unbearable!
Is this really Apple? Hard drive failed after a year and this is the 3rd screen of the iMac, and it just gets worse...
I wonder if there's anyone who had the luck to get the yellow screen replaced by a decent one?

Are you talking about a mid-2011 iMac or a 2010 iMac?
As it seems, the issue of color inconsistency of the iMac display is far from solved. Yellow tint, uneven brightness, light-leaks are very easily found even of newer models. I have a two-week-old mid-2011 27-inch iMac that I tried to replace for a new one because of yellow tint issue. It turned out that the replacement iMac had a worse screen... So I kept the first one. Not sure if the right thing to do is just get the screen replaced. It seems users have done it with no success...
So, I guess these problems are structural on the iMac line. They seem very much to be omnipresent. And I don't see Apple offering a genuine/trustworthy solution through its in-warranty support.

Uneven brightness

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