The current issue of the Pbase magazine has an interesting article on noise reduction in low-light still-life scenes by shooting multiple images and combining them in Photoshop CS3 or later using Stacks.
http://i2.pbase.com/o1/mag/pbase_magazine_vol13_jun2010.pdf
(22nd page)
This is a shortened version of a method used by astrophotographers for combining multiple shots. It used to be very painful to do this in Photoshop so astrophotographers mostly use special software. The method described can greatly reduce random noise in the final image. It will not remove "fixed pattern noise" due to hot pixels and differing sensitivities or offsets in different pixels. For that we could subtract a "dark frame" (lens cap on) of the same exposure length from each image before combining. The best dark frame uses the same technique of combining several individual dark shots to reduce the random noise in the dark frame. Mostly it's only the astro guys who are wiling to do that much work for one image!
Tags: random noise, multiple images, current issue, pattern noise, image noise reduction
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In D. C. they were introduced to national geographic and National Geographic staffers who perused their work and gave them pointers; these meetings were proved to be anything but lip service earlier this year when 2006 honoree Newsha Tavakolian landed National Geographic Magazine’s August cover story, Persia: Ancient Soul of Iran. After the festival the honorees traveled to New York, where the program’s organizers helped them set up interviews with editors at papers, magazines, and galleries.
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One of my favorite plants is the Chinese evergreen, or aglaonema. It puts up with low to medium light and comes in a wide variety of styles: different heights, and many different interesting leaf patterns.
There are many good dracaenas that do well in medium to low light. Warneckii is a good example that really brightens an area. I like the varigated leaves that are offered in many of our house plants as a way of adding interest to the home.
When it comes to really low light areas, the spathiphyllum, or closet plant, is the queen of the home. This one can put up with less light than any other species. It produces these little bloom structures that turn white and can be quite attractive.
In order to have success with house pants, you want to make sure and not over water them. We do tend to over water our house plants too often and it just causes root rot. In a low light environment, they just don't use as much water as they would in a bright outdoor environment.
Secondly, don't try to over fertilize. You can't replace light with extra fertilizer; that just creates additional problems. If you'l move them periodically to a brighter environment to let them gather some light, produce carbohydrates, and replinish their strength, then you can move them back in.
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