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June 13, 2012
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Photography Troubleshooting: Noise

Wed Jun 13, 2012, 6:05 AM
This series of articles aims to answer the questions of Photographers on deviantART who have burning issues with their cameras. Have an issue? Leave a comment at the end of the article and we'll do our best to help you figure out the answer. Additionally if you have information that could help someone out - let us know!

"I would love to figure out how to reduce the noise on my camera.
I'd love to drop kick it off of a very high cliff, but then I wouldn't
have a camera at all. It may just be because the camera is a POS
though..."  ~CelticStrm-Stock



NOISE by apriliscancelled


"Noise is a characteristic that can be mitigated with numerous techniques.

Noise is all about how much light a camera can capture above its inherent noise floor (the natural noise that the sensor and electronics will always make regardless of what you do), the more 'signal' there is above the noise floor, the less visible the noise will be.

Based on the EXIF information on your images, you have a compact camera, with a 1/2.5" sensor. Smaller sensors will, invariably, produce noisier results than larger sensors with the same number of pixels, within the same sensor generation (obviously, each generation made sensor manufacturers apply more and more ways to bend the laws of physics to make their sensors perform better).

Fortunately, you have some pluses on your side, your camera has access to manual exposure modes.
Reducing noise requires using the lowest ISO available (commonly referred to the base ISO), the widest aperture (the smallest F number, so say F/4 is physically larger than F/5.6), and the longest appropriate shutter speed.

Noise by EliseEnchanted


The shutter speed might pose a sticking point as it might push the exposure time to seconds in length for even a moderately well lit scene, so you can either get a tripod, or if that's not practical you'll have to make the compromise of higher noise in getting the shot.

If carrying a tripod is fine and good, you may also want to 'Expose to the Right'.
Nearly every camera with Manual Exposure options has the ability to display a histogram of the image.
A histogram, if you didn't know, is a bar graph plotting out the number of pixels at each brightness level (unless the camera can shoot RAW, which yours cannot, unless you use CHDKthere are 256 possible levels for you).

Exposing to the Right makes the image as high key as possible without over-blowing the highlights of the image, the point is to make the image as bright as possible, in other words, the histogram will be heavily weighted to the right side.

When you get this exposed to the right image, you'll, naturally, have to correct the exposure in post processing, this will have the effect of reducing the noise in the shadows, while also making the image not blindingly bright.

There are some disadvantages of course, most especially if you're shooting in JPEG, but if noise is a primary concern, then this is a good place to start." ~ sine-out

Noise by Gin-Inari

The latest edition of Photography Troubleshooting aims to help you understand how to reduce Noise in your shots. Enjoy!
Add a Comment:
 
:iconmaytel:
maytel Featured By Owner Jul 4, 2012
THANK YOU SO MUCH FOR THIS! :heart:
Reply
:iconkaz-d:
Kaz-D Featured By Owner Jul 4, 2012  Hobbyist Photographer
Welcome! :)
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:icon1001g:
1001G Featured By Owner Jun 27, 2012
we all appreciate what u do !
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:iconkaz-d:
Kaz-D Featured By Owner Jun 28, 2012  Hobbyist Photographer
Thank you :)
Reply
:icon1001g:
1001G Featured By Owner Jun 28, 2012
no, ty!
Reply
:iconcelticstrm-stock:
CelticStrm-Stock Featured By Owner Jun 16, 2012  Hobbyist Digital Artist
Thank you for quoting me! :D I will give the tips a try and see if that helps!
Reply
:iconkaz-d:
Kaz-D Featured By Owner Jun 16, 2012  Hobbyist Photographer
Excellent news!
Reply
:iconjamminjo:
JamminJo Featured By Owner Jun 14, 2012   Photographer
Added to #DevNews posting on June 15, 2012.
Reply
:iconeliseenchanted:
EliseEnchanted Featured By Owner Jun 14, 2012  Student Photographer
Great article, thanks for including my picture
Reply
:iconkaz-d:
Kaz-D Featured By Owner Jun 15, 2012  Hobbyist Photographer
Welcome!
Reply
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