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This thread is privately moderated by Jack Crossfire, who may elect to delete unwanted replies.
Jan 16, 2007, 03:30 PM
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Comet terrorism


Someone was curious about the McNaught movie that no-one was interested in. It's available on

http://prdownloads.sourceforge.net/h...g.mov?download

This is the only movie of Comet McNaught made from the ground. It was the comet's last descent into the horizon before disappearing from the northern hemisphere forever. Unsharp mask, time average, light subtraction, and huge amplification in floating point Cinelerra brought the comet out of the original JPEG images.

Light subtraction is an extreme version of unsharp masking. A 500 pixel blur is applied to one copy of the image and subtracted from the original image. This removes the ambient light, leaving only objects smaller than 500 pixels.

Even with the software processing, the movie was still too noisy for MPEG compression so a JPEG movie was created.

Consisting of only astronomical observations, you might say the space side of our aerospace operation is RC without the C.
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Jan 16, 2007, 05:02 PM
Stilwell Shipyard
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Jack,

I tried the link and it just went into never ending download??? How big is the file?

Hurricane Larry
Jan 16, 2007, 05:28 PM
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88 Mb
Jan 16, 2007, 06:16 PM
Stilwell Shipyard
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wow
Jan 16, 2007, 06:58 PM
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I got it! Outstanding!


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