AuthorTopic: Does the 50/50 dithering bug your eyes too ?  (Read 7016 times)

Offline fil_razorback

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Does the 50/50 dithering bug your eyes too ?

on: April 21, 2007, 12:47:55 pm
Hi all, I've been wondering for a while about my vision : when I see a large 50/50 dithering pattern at zoom100%, the screen looks glitchy to me. I see some horizontal lines running accros the pattern (and moving !)
However, the illusion stops when I zoom in.

Is it my screen or my eyes or everyone's eyes ?


Example :
« Last Edit: April 21, 2007, 12:49:41 pm by fil_razorback »

Offline Faktablad

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #1 on: April 21, 2007, 01:02:23 pm
I think it's everyone's eyes.  The effect is probably more pronounced or less pronounced, depending on the colors that are used.

Offline Stwelin

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #2 on: April 21, 2007, 01:08:42 pm
Doesn't bug me at 1x, but i think my monitor is so old they just get blended together... I am at a pretty high resolution, too.

Offline philipptr

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #3 on: April 21, 2007, 03:15:17 pm
Are you using a crt or a tft? did you try changin the hz of your monitor?
Sounds to me like a tft that isn't propper calibrated to the graficcardssignal clock/phase.
Also for example I know that a friends monitor isn't able at all to display 1280*1024 at 60 hz (works fine at higher hz but at 60 hz you see these lines everywhere not only on 50% patterns ;) )

Offline Helm

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #4 on: April 21, 2007, 04:03:43 pm
at 1x the only impression I get is that this is a great texture for a rug.

Offline 9_6

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #5 on: April 22, 2007, 01:38:35 am
I'm behind a tft.
No lines visible.
What i get though is a solid colour if I zoom in clicking on that image, no more dithering pattern.
I only experience this when zooming into pngs though. (not all. I think it's the 32bit pngs which do that. This one has 32bit...)
Am I the only one who gets that?
Does scaling an image blur it?
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Offline dragonrc

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #6 on: April 22, 2007, 06:56:36 am
I see horizontal and vertical lines, not 1 solid color

Offline Xion

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #7 on: April 22, 2007, 10:30:53 am
I've got 2 computers, each with different quality monitors:
On my current one, it's a solid color (Pixel art appears fuzzy on this one, too.)

On the other one, it's, like Helm said, "ruggy," and I can see alternating horizontal lines. As if the dither were done with quadruple/quintuple-wide pixels.

Offline Rydin

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #8 on: April 22, 2007, 06:56:48 pm
On my laptop it seems fine, but on my CRT monitor it's all "eye-buggy".  Strange. :-\
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Offline Conzeit

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #9 on: April 23, 2007, 04:15:11 am
hrm. I see horizontal noise, static. and I'm on LCD

Offline Zenobia

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #10 on: April 24, 2007, 11:26:51 am
I have an LCD screen and I see the rug like texture as well. (like so)

Offline ptoing

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #11 on: April 24, 2007, 12:03:05 pm
Has to do with the frequency (refresh rate) of the monitor. One the one I am currently at (LCD) I got mad horizontal flickerbars when in 75 hz mode, in 60 hz it is fine.
There are no ugly colours, only ugly combinations of colours.

Offline Dusty

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #12 on: April 28, 2007, 03:00:50 am
I see pink nearly vertical lines shaking rapidly.
1024x768, 60Hz on a 15inch CRT.
« Last Edit: April 28, 2007, 03:03:15 am by Dusty »

Offline Evil-Ville

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #13 on: April 28, 2007, 09:44:25 am
60hz on a CRT? That's not very healthy to your eyes, you know.

Offline Stwelin

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Re: Does the 50/50 dithering bug your eyes too ?

Reply #14 on: May 05, 2007, 01:01:30 pm
generally having fine particles shot at you is not very healthy.
(eh, i guess having glass in the way helps?)

Anyway, on my new LCD the 50/50 dither is more distinguishable, i can see the two different colors a little bit more, but when i scroll, or it moves, it blinks rapidly.