Another Technique for Compressing Astronomical Imaging
نویسندگان
چکیده
We describe a technique which has not previously been applied to astronomical images. The method separates the \signal" portion of every pixel value from the \noise" portion, and attempts to compress the former, but transcribes the latter verbatim. In typical astronomical images, fewer than half the bits in each pixel are truly noisy; this method can therefore provide lossless compression by factors greater than two. We provide standalone software (via WWW) to implement our technique on 16-bit unsigned FITS images.
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