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DPChallenge Forums >> Photography Discussion >> perforated lines.why?
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Showing posts 1 - 15 of 15, (reverse)
AuthorThread
 09/30/2005 12:48:06 AM · #1
What causes lines to appear perforated in a photo? I've only had this happen with vertical lines.
 09/30/2005 12:52:59 AM · #2
oops..I just checked a photo and it also happens with horizontal lines :-)
 09/30/2005 12:57:52 AM · #3
It usually happens with lines that are not quite true vertical or true horizontal. If the line has an actual thickness on the image of, say, one pixel and is against a contrasting color, then the interpolation algorithim may create background-color gaps.

Robt.
 09/30/2005 01:00:47 AM · #4
Ok. Thank you.
 09/30/2005 01:26:05 AM · #5
or it could be poor resizing of photos :p
 09/30/2005 01:33:36 AM · #6
Originally posted by shadow:
or it could be poor resizing of photos :p


Yeah, that's usually when it happens...

R.
 09/30/2005 01:50:38 AM · #7
It will also appear that way if you are zoomed out or in on an image and it is a relatively thin line.
 09/30/2005 01:53:56 AM · #8
And I just thought it was an automated way to show you where to crop :-P
 09/30/2005 02:00:07 AM · #9
Originally posted by taterbug:
And I just thought it was an automated way to show you where to crop :-P


Nah, those are the "marching ants"; actually, if you blow 'em up to 800% magnification you can see they are tiny marching potato bugs :-)

R.
 09/30/2005 02:17:23 AM · #10
Originally posted by bear_music:
Nah, those are the "marching ants"; actually, if you blow 'em up to 800% magnification you can see they are tiny marching potato bugs :-) R.


His years as prison wardon with a watchful eye finally pays off...LOL
 09/30/2005 09:46:26 PM · #11
The poor resizing of photos?
I know that this isnt a college course , but could you explain?
 09/30/2005 09:48:11 PM · #12
I didnt resize the photo. It came outta my camera with that appearance.I have a cheap camera. Could that be the problem?
 10/03/2005 04:17:07 AM · #13
Originally posted by KMD600:
I didnt resize the photo. It came outta my camera with that appearance.I have a cheap camera. Could that be the problem?


Hi KMD600, I have a konica-minolta too and its only half the pixels you have with yours. So I believe it is not caused by your camera. do you have any examples of the jagged lines you were talking about?

Message edited by author 2005-10-03 04:21:01.
 10/03/2005 05:30:44 AM · #14
How is your camera set up.. are you getting the best quality setting or are you using standard JPEG?

I remember my very first Sony camera was set to smallest file size and i thought the camera was a pile of rubbish but then i set it up properly and this confirmed my first impression but more clearer..

Seriously check the settings are maxed out for quality and file size.
 10/03/2005 05:23:23 PM · #15
Im no expert but have noticed on my printer settings it gives the option to print with perforated lines or not? Do have a look at your printer settings?
Jodi
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