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Photography Question 
Tom Jones
 

Bands appear on straight lines


I have recently converted from film to digital photography. I have a kodak point and shoot the does 5MP and a Sony Digital SLR that does 10MP. I have noticed a problem in some photographs on both of these cameras. when I shoot outdoors, if there are straight lines in the photo (like the lines on a road or power lines or telephone lines) I get a dashed line instead of a complete line. I have never seen this effect on my film photos and it doesn't always happen. I am assuming it is my technique. Can someone tell me what causes this and how to prevent it or correct for it. Thanks.


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8/15/2006 3:48:49 PM

 
anonymous A.    I doubt your technique is at fault, Tom...could you post an example so we can get an idea of what's happening?


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8/21/2006 5:37:52 AM

 
Tom Jones   I will post some examples. However it will be a couple of weeks. I am currently on vaction and don't have acccess to the ones that produced this problem. Thanks for you assistance.


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8/21/2006 8:12:04 AM

 
anonymous A.    Enjoy your holiday, Tom...and bring us back some photos!


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8/21/2006 3:13:55 PM

 
Bob Cournoyer
BetterPhoto Member Since: 2/9/2003
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  Dashed/jagged lines on the thumbnail and a larger version shows the lines normal??


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8/21/2006 8:31:42 PM

 
Bob Chance
BetterPhoto Member Since: 2/19/2006
  Tom:

I think it has to do with the way these images are displayed. Remember, on screen, your image is made up of a bunch of dots. Often times, these dots don't have the right orientation with respect to one another, in order to draw a straight line. Same is true with circles. In that case, they interpolate.
If you enlarge your image to 100%, you should see these jaggies dissapear and a more accurate representation of your lines will be seen.
I have noticed this phenomonon also, but upon magnification, it dissappears. You should not notice this on any prints though.


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8/22/2006 5:37:13 PM

 
Tom Jones  
 
 
Thanks for the input. Here is an example of what I am describing. I have tried enlarging the photo and The dark line seems to get better however the lighter colored lines seem to become more jagged and broken. Any suggestions? Of course, not having power lines and phone lines in the picture is the ideal to aim for. But that isn't always possible. I have also noticed on some pictures the edges of sharp objects seem to display the same problem. for instance, on some buildings the roof peak will be chopped and broken. I have included and example of that also. Thanks for any ideas you can offer to correct this issue. I have some great pictures of Alaska I will share with you later. However, When I returned home from vacation, the roof was leaking, my cat got sick and my hot tub won't start without blowing a fuse. So I am juggling some other issues at the moment.


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9/6/2006 5:58:42 AM

 
Bob Cammarata
BetterPhoto Member Since: 7/17/2003
  This is common.
It can be frustrating when scanning a perfectly focused slide and getting those jagged lines.
Lines on an angle seem to pixelate the worst. During composition, I usually avoid sharp lines on a 45 degree angle.

Bob


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9/6/2006 6:11:41 AM

 
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