Reprocessed Saturn from the 11th Jan

[davidpretorius]

hey asi, i have downloaded the ziipped up files, do you want me to post to you on cd???

[asimov (John)]

Yes, ok mate, thanks!

[bird (Anthony Wesley)]

The script is quite short, here it is:
------------------start---------------------
#!/bin/sh

mkdir red green blue

for i in *.bmp; do
echo $i
base=`basename $i .bmp`
new=$base.ppm
red=$base.red
green=$base.grn
blue=$base.blu

# Convert a.bmp to a.ppm
bmptoppm < $i > $new

# create a.red, a.grn and a.blu
ppmtorgb3 $new

# convert each one back to BMP and write to subdirectory
ppmtobmp -bpp 8 < $red > red/${base}.bmp
ppmtobmp -bpp 8 < $green > green/${base}.bmp
ppmtobmp -bpp 8 < $blue > blue/${base}.bmp

# clean up, remove intermediate files
rm -f $red $green $blue $new
done
-------------------end---------------------

It creates 3 subdirs (red,green,blue). For every file XXX.bmp it creates red/XXX.bmp blue/XXX.bmp and green/XXX.bmp as monochrome files.

What else... yes I used wavelets in registax, but fairly gentle, so that the images weren't overly processed. I think I stacked about 500 frames each time and set the wavelets to about 10 in the middle layers, left the lower and upper layers alone.

The maximum filter doesn't take any parameters... I assume that it uses a 3x3 or 5x5 filter size, and sets the centre to the largest value.

for ME I used 10 turns at 1.5. I also experimented with LR deconvolution, that might actually be what I used in the last image - 10 turns at 1.5 again.

DP: Yes, you can get the package for Windows. I think that's what Mike has done.

regards, Bird

[Robert_T]

Lovely reprocess Mike and Bird, each are excellent images in their own way.


If I'm reading this right, PPM centre that you run creates BMP frames that Bird has split into red, green and bluw and processed separately?

[iceman (Mike)]

Thanks Robert.

And no, not exactly.

I start with an avi, and I use "VirtualDub" to save the image sequence as a set of bmp's. Each frame in the avi comes out as a BMP file. So you end with a thousand or a few thousand bmp files.

ppmcentre then works from bmp files, processing each frame separately.

[atalas]

Great work guy's !