Annoying screen, marks on pictures?

J

John.D

Suspended / Banned
Messages
335
Name
John
Edit My Images
No
Hey all,

I took some shots the other day and have been working on one in Photoshop, getting rid of the background (just a horizon line in the middle of the shot) with the eraser brush. It was a long exposure which I turned to black and white, so it was mostly white anyway. It looked fine until I calibrated my laptop screen and desktop screen (LCD), when I saw the annoying blown out areas in the shot which the long exposure had brought out, and also marks where I had erased that area. Now i've used different tools to smooth it out and looking at the screen from a normal face on angle it looks fine, but when both screens are tilted up you can still see the annoying marks. Is this normal? Should I be still working on getting rid of them even though they only show up when the screen is tilted up? Perhaps it easier if I showed you what I meant in the shot.
 
Thing is i'm using a ColorMunki photo to calibrate both screens, which should be doing a decent job. It helped show more of the marks after calibration that it did on the uncalibrated screen, which was helpful, but they still show up only when the screen is tilted up (towards the ceiling)
 
I think I need to see the shot to get what you're driving at John, I can't quite picture it.
 
It's just a long exposure experiment with my new BW 10 stop. Heres the shot once it's been changed to black and white with a blacks increase - http://img9.imageshack.us/img9/8062/pierbefore.jpg

But the problems arise when I edited it further, I cropped it and got rid of some things - http://img16.imageshack.us/img16/9682/piermarks556.jpg
In the circles are the marks I mentioned, but for some reason viewing it now online some of the marks don't show up. In Photoshop their were marks in the bottom circles which appeared because I increased the blacks a bit too much, that kind of black, noisy thing that appears, but these only appear on my laptop screen in Photoshop - it seems fine viewing it online on my laptop and on my desktop screen, even though I calibrated them both just now :shake: Not sure whether it'll appear on your screen. I got rid of the post and I can still see the eraser mark, but only when I tilt the screen up. The circles one on the far right is an eraser mark from where I got rid of the horizon, and this also only appears when I tilt it up (on all screens and online)
 
Well TBH I can't see them! The only thing that springs to mind is could your white be not quite absolute white, could it be off just a little? I don't have access to a colour picker at present, but is your white 255, 255, 255? If not, say 254, 254, 254, and you erase it, you may just see a slight difference. Could be a load of cobblers of course!
 
Yeah it's not to so much that, the brush may not have been set to completely white, the problem is more that they only appear when you tilt the screen up, and why that is. I just find it odd :shake:
 
Well that's something to do with the off-axis contrast response of LCDs I guess. They're a lot better than they used to be, but do you remember how you could almost get a solarised image viewing LCDs beyond a certain angle.
 
You must log in or register to reply here.
Back
Top