Comments on: Reducing noise from digital images http://www.mehtanirav.com/2007/04/11/reducing-noise-from-digital-images Nirav Mehta on life, technology and future Thu, 04 Mar 2010 13:19:05 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Kartik Mistry http://www.mehtanirav.com/2007/04/11/reducing-noise-from-digital-images/comment-page-1#comment-55232 Kartik Mistry Thu, 12 Apr 2007 05:50:03 +0000 http://www.mehtanirav.com/2007/04/11/reducing-noise-from-digital-images/#comment-55232 Using manual mode will be helpful. My digicam is of ISO 1000, while you can reduce the ISO rate too. Using manual mode will be helpful. My digicam is of ISO 1000, while you can reduce the ISO rate too.

]]> By: Sujeet Bambawale http://www.mehtanirav.com/2007/04/11/reducing-noise-from-digital-images/comment-page-1#comment-55132 Sujeet Bambawale Wed, 11 Apr 2007 16:43:58 +0000 http://www.mehtanirav.com/2007/04/11/reducing-noise-from-digital-images/#comment-55132 I've heard good things about NoiseNinja, and known of a few other selections in the "removing noise" space. However, one of the most common tricks I've known is, is tweaking the red channel on the picture. Most noise bleeds in on the red channel. If you're still using the S2, here's something I'd recommend: # Set the focus selection to "center spot only" # Use the zoom lens, and use the entire barrel; i.e. "zoom all the way" # Flip to Shutter Priority Have your subject (preferably a live person of significance!) stand in / against a moving crowd and/or against moving traffic, preferably in the evening hours when the background is lit. Get the lowest shutter speed; i.e. keep the shutter open for as long as possible, while focussing on the subject in the center of the frame. The resulting depth of field and focus results in the following effects: # Blurs out everything but your subject # The background is moving, and the shutter's open for a while, so its naturally blurred as well - while your subject is sharp # Works both in sunlight and the evening hours. In the evening hours, the traffic offers the light. In sunlight hours, its a great blur effect nonetheless. Oh, and while doing all this, make sure your ISO is at 80 or lower. You want the "streaks" and "blurs" from the traffic and/or moving background. The results are quite trippy. Later, Sujeet I’ve heard good things about NoiseNinja, and known of a few other selections in the “removing noise” space.

However, one of the most common tricks I’ve known is, is tweaking the red channel on the picture. Most noise bleeds in on the red channel.

If you’re still using the S2, here’s something I’d recommend:

# Set the focus selection to “center spot only”
# Use the zoom lens, and use the entire barrel; i.e. “zoom all the way”
# Flip to Shutter Priority

Have your subject (preferably a live person of significance!) stand in / against a moving crowd and/or against moving traffic, preferably in the evening hours when the background is lit.

Get the lowest shutter speed; i.e. keep the shutter open for as long as possible, while focussing on the subject in the center of the frame.

The resulting depth of field and focus results in the following effects:

# Blurs out everything but your subject
# The background is moving, and the shutter’s open for a while, so its naturally blurred as well – while your subject is sharp
# Works both in sunlight and the evening hours. In the evening hours, the traffic offers the light. In sunlight hours, its a great blur effect nonetheless.

Oh, and while doing all this, make sure your ISO is at 80 or lower. You want the “streaks” and “blurs” from the traffic and/or moving background. The results are quite trippy.

Later,
Sujeet

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