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Author Topic: Photography help  (Read 7065 times)

Photography help
on: April 25, 2006, 18:56:31 PM
Iv got a Canon digital ixus i and i need some tips. Its a 4 MP camera and is great for point and shoot photos. Or so i thought.

Look at the below photo:



Notice the wheels, round the alloy where it meets the tyre, a blue tint.

I get this discolouration a hell of a lot these days. What is it, what causes it? What can i do to stop it?

Cheers
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Re:Photography help
Reply #1 on: April 25, 2006, 18:58:42 PM
Lens problem? have you cleaned the lens?
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Photography help
Reply #2 on: April 25, 2006, 19:01:07 PM
My people call it "a highlight". ;)
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Photography help
Reply #3 on: April 25, 2006, 19:21:51 PM
not touched the lens, seems clear and not dirty at all
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Photography help
Reply #4 on: April 25, 2006, 19:27:18 PM
heres a section in the native res:



The camera is in the highest res and quality itll do. Kinda expected better from canon.
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Photography help
Reply #5 on: April 25, 2006, 19:28:22 PM
Quote from: maximusotter
My people call it "a highlight". ;)

Nothing constructive to add? :-)
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Photography help
Reply #6 on: April 25, 2006, 19:31:10 PM
Quote from: Binary Shadow
Quote from: maximusotter
My people call it "a highlight". ;)

Nothing constructive to add? :-)


Erm, my comment is the only constructive one in this entire thread. Finely textured black, such as that of tire sidewalls, may get blue highlights do to optical dithering. Note a blackbirds wings in the sun.
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Photography help
Reply #7 on: April 25, 2006, 19:32:35 PM
its not just around the tyre tho :( its round the tree in the backgroud as well, its pretty messy if you zoom in at all
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Photography help
Reply #8 on: April 25, 2006, 19:38:33 PM
See if the quality is set to anything but the highest setting, youre probably just sensitive to compression artifacts.
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Photography help
Reply #9 on: April 25, 2006, 19:42:04 PM
tis set to max res and superfine (max quality). dunno what quickshot is but might try turning that off for a bit.

Have uploaded the full image as it comes off the camera:

http://homepage.ntlworld.com/a.woodford/imagef.jpg

Take a look, notice around the tree top left, top of the roofs. if you zoom in on it its orrible.
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Photography help
Reply #10 on: April 25, 2006, 19:45:13 PM
Quote
Another enhancement, called QuickShot, allows users to take a very fast picture without having to wait for the camera to focus. The camera just switches to infinity and fires.

Sounds like a bodge to me lol
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  • Offline Eagle

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Re:Photography help
Reply #11 on: April 25, 2006, 19:48:33 PM
U-huh.

Its called Chromatic Abberation.  Nothing to do with pixels or file size - just poor lens qualiteh, tbh.

http://www.dpreview.com/learn/?/Glossary/Optical/chromatic_aberration_01.htm

:)
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Photography help
Reply #12 on: April 25, 2006, 19:51:12 PM
great my poor quality £220 (when purchased) camera fluffs every photo i take.. great!
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  • Offline Eagle

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Re:Photography help
Reply #13 on: April 25, 2006, 19:54:48 PM
 
Go into your image editor, draw a circular mask (marquee tool) loosely around the rim and desaturate the Blues. :)

Before:



After:



:)
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Photography help
Reply #14 on: April 25, 2006, 19:56:22 PM
oh... sweet :D cheers :)
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