[Imgcif-l] High speed image compression

[harry powell]

Hi

Have you tried Eric Eikenberry's byte-offset compression? I found the  
decompression was ~20x faster than CBFlib when I implemented it in  
Mosflm.

On 28 Jul 2011, at 19:46, Justin Anderson wrote:

> Hello all,
>
> I have run Graeme's byte offset code on a 4k x 4k (2 byte depth)  
> Gaussian noise image and found it to compress the image in around  
> 150 ms (64-bit RHEL, Pentium D 3.46GHz).  Using CBF library with  
> byte offset compression, I find the compression takes around 125 ms.
>
> This will be too slow to keep up with our high speed CCD cameras.   
> We are considering parallelizing the byte offset routine by  
> operating on each line of the image individually.  Note that this  
> would mean that a given compressed image would be stored  
> differently than via the whole image algorithm.
>
> Has anyone been thinking about this already or does anyone have any  
> thoughts?
>
> Regards,
>
> Justin
>
> -- 
> Justin Anderson
> Software Engineer
> Rayonix, LLC
> justin at rayonix.com
> 1880 Oak Ave. #120
> Evanston, IL, USA 60201
> PH:+1.847.869.1548
> FX:+1.847.869.1587
>
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Harry
--
Dr Harry Powell,
MRC Laboratory of Molecular Biology,
Hills Road,
Cambridge,
CB2 0QH