I get these faint white lines appear at the end of black lines
look closely
what are they?
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I get these faint white lines appear at the end of black lines
look closely
what are they?
Hi Quazy Wabbit,
I suspect they're because the lines aren't whole pixels in length, that's the usual cause, so you get an antialiasing effect.
Does it happen to yours?
It happens in illustrator too
on any width line
:(
As well as the shapes having to be in whole pixels, they must be positioned in whole pixels.
Here's a close up of the antialiasing within a bitmap. The 2 images are exactly the same apart from being mirrored and the all the internal shapes in the left hand side being offset to .5 pixels. Notice the additional in-between pixels on the left.
So if you want accuracy ensure you snap to grid of 1 pixel settings.
Here's the same image at 100%. You can hardly see the difference but it's still there.
Egg thanks but the white streak at the end of the line is my concern.
:confused:
Hasn't Egg already given you the answer - lines not occupying whole pixels?Quote:
Originally Posted by behzad
I still see the ghost lines on the right of the lines only
this is at the end of the lines stretching out.
Maybe it is my monitor.
I bought it new HP W2007
:(
Isn't language grand! The width of the line and the length of a line could be interchangeable terms. I think Egg is saying all measurements should be in whold pixels...both the width and height and the x/y coordinates.
Mickie
It is my monitor, somehow these lines appear on the white background
must be LCD issue.
Maybe you're just younger than most of us and you can see subtle things that some of us older folks stopped seeing years ago. :-)
Gary your always young in my eyes.
;)
Behzad,
I attach the xar.
Just another thought. LCD monitors are made to work best at a set resolution and whilst it's possible to alter the resolution they are not as good at this as CRT's So it might not be your monitor it might just be the resolution setting.
Dear egg, if I was not a wabbit i would not like you so much
get it, easter
:P
It is my monitor for sure, i am set at optimal and it shows.
I am sure it will not appear in print (prepress)
It is okay, only shows on white, if I put a color background it disappears.
Thanks for your effort:)
Take a screen grab (with the line showing) and attach it here, then we can see exactly what's happening (or not).
Some monitors will show a ghost image slightly to the right of the real pixels where there's a sudden change in brightness. KVM switches can make this effect worse.
To reduce the problem remove any KVM switch and if possible use a DVI lead instead of a VGA lead.
You should see the same ghosting over the whole screen display if you've got it, not just from Xtreme. And, of course you can't capture this artefact in a screen grab.
Phil
Yes, that's why the screen grab would show this as a monitor fault or otherwise.Quote:
Originally Posted by PhilM
You didn't mention whether you see these artifacts whilst editing or just after exporting. If you only see them on exporting to JPEG, it's possible that they are the result of the lossy compression present in JPEG. JPEG is well now for working well with photos with smooth variation in colour, but producing exactly the ghosting (technically known as ringing) you report at the edge of abrupt changes (for examples in cartoons). If this is the case it maybe worth comparing the result from exporting to a lossless format like PNG.
Phil hit the nail, it only happens on the right side of lines and objects not the left. I have to switch to DVI from ANALOG.
Here is a screen capture.
Luke this happens as I draw (now I noticed even in illustrator)
OK, as far as I can tell from the bitmap, there's nothing peculiar about the image, so you must be seeing something different on your monitor.
There's something bizarre about looking for a white line at the end of a black bar which itself sits on a white background!
I can only imagine that your monitor isgiving a less than optimal picture, but this would be evident in anything on screen, though I suspect that it's the high B&W contrast that's making this show most.
When we bought our first widescreen TV I insisted that it was faulty because when There was a high contrast the screen would distort - dark lamp posts against a bright sky would bend and 4:3 aspect TV would be noticeably distorted on the edges.
I had a replacement. Just the same. Went to the TV shop - exactly the same for every TV there..
In comparison I've never seen this effect on a monitor and it's not the same as you are describing, but i think you are just seeing an effect/outline around high contrast sections and just like my TV you may only be seeing this effect horizontally.
Anyway, that's a theory from someone that knows nothing about this stuff.
Paul
Exactly high contrast and only horizontal lines and shapes.
funny that only the right side of line or shapes show this ghost not the left side.
But anyways it does not upset me, as long as it does not appear on my design work then i am ok.
Maybe I should have bought the viewsonic monitor.
hmmm
It to me looks like a 'ghost' gray bar a few millimeters after the end of black area is causing what's looking like a white bar. I was a bit surprised to see it on my CRT (reasonable quality, but quite old, iiyama vision master pro 454), which is partually why I assumed it was on JPEG export.Quote:
Originally Posted by pauland
It's not really that surprising that it happens only on the right-hand end since that's the direction that the screen is scanned (and maybe more importantly in your case, the image is transmitted from your graphics card)! As someone else suggested it may be worth trying using DVI if this is an option with your monitor\graphics card. This should eliminate one possible source of the ringing (see the video heading in http://en.wikipedia.org/wiki/Ringing which describes exactly what your reporting)
Luke, if it is a matter of monitor then really in my art work that will not appear to print?
I guess not. Then I am ok with it.
I have seen the same effect, trying to design an invoice form. It should be a matematical approximation effect of the drawing. I have always fixed zooming at around 16500% and FINE TUNING the lines. Zooming back at 100% it should go away. If not please post the .XAR file.
I would imagine it is possible to get the same type of effect (ringing) when sent to print, but printers use much smaller dots (150 - 300 or better DPI) compared to a monitors 96 DPI... You would need a magnifying glass to see it most of the time.:)