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Image stacker programs



 
 
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  #1  
Old March 17th 04, 07:41 AM
John Chewter
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Default Image stacker programs

Hi all - I have just written an image stacker (image averaging) noise
reducer.

It works very well but I was wondering what performance you guys get to
average, say, 8 images at 640 480? Like x seconds on a 1Ghz machine?


  #2  
Old March 17th 04, 04:46 PM
Robin Leadbeater
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Default Image stacker programs


"John Chewter" wrote in message
...
Hi all - I have just written an image stacker (image averaging) noise
reducer.

It works very well but I was wondering what performance you guys get to
average, say, 8 images at 640 480? Like x seconds on a 1Ghz machine?


Hi John,

If you are just talking about stacking (ie not aligning) then something like
k3ccdtools will do this in under a second

Robin


  #3  
Old March 17th 04, 05:10 PM
Robin Leadbeater
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Default Image stacker programs


"Robin Leadbeater" wrote in message
...

If you are just talking about stacking (ie not aligning) then something

like
k3ccdtools will do this in under a second


I probably should qualify that by saying that these are 24bit colour images.
It stacks these at 10frames/sec on my 350MHz Pentium II

Robin


  #4  
Old March 17th 04, 05:27 PM
Ancer
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Default Image stacker programs

that would be a good 1 for it how about give us a download link so we
can try it.
  #5  
Old March 17th 04, 06:39 PM
John Chewter
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Default Image stacker programs

I had no idea what speeds others had acheived.
I made it for low noise Xray & microscopy.

Well on my 2GHz XP it reads 9 files (640x480 grasyscale) from disk, combines
the 9 images and displays the result in 0.76 sec (8 bit grayscale only at
this time)

It doesn't allign - it just combines.

that would be a good 1 for it how about give us a download link so we can

try it.

Sure - give me a day or two to clean it up.

John


  #6  
Old March 18th 04, 12:38 AM
Robin Leadbeater
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Default Image stacker programs


"John Chewter" wrote in message
...
Can someone point me to stack of images? - in series of nine or better?
Thanks


You can see a recent processed image of Jupiter on my website here

http://mysite.freeserve.com/astro2/astro2_image_66.htm

An example of a raw frame and the aligned stack of 480 frames that were used
to produce it are here

http://mysite.freeserve.com/astro2/astro2_image_66a.htm

I used Registax2

Robin


  #7  
Old April 1st 04, 01:27 AM
Ian Stirling
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Default Image stacker programs

John Chewter wrote:
Hi all - I have just written an image stacker (image averaging) noise
reducer.

It works very well but I was wondering what performance you guys get to
average, say, 8 images at 640 480? Like x seconds on a 1Ghz machine?


I was doing 25Hz with no problems doing a running average, with only
the crudest C code, on a PPro 240Mhz.
Basically, it stacked byte-wide images into 2 byte words, and
applied a crude function to rescale the top 10% of the word, until
a specified number of pixels got near overflow, then outputted the image.
 




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