Tony Hallas' Cosmic Imaging: Signal-to-noise ratio
October 2010: Top-notch processing involves accentuating the positive and minimizing the negative.
Contributed by Tony Hallas
Published:
August 23, 2010
 Dark current (top), which Hallas described in last month's column, introduces electronic noise into astroimages taken with CCD cameras. Luckily, it's easy to remove with software. The result (bottom) speaks for itself.
Photo by Tony Hallas |
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