Image data migration and transformation

kumar_s · Post by **kumar_s** » Tue Mar 21, 2006 9:15 am

Sorry that I didnt noticed that it is of Server forum. Compress stages i avaiable only in PX.
BTW as Kenneth suggested, beyond the thershold of 10K should be considred to directly by skiping the DS.
If compression is the only criteria looked for, some external compression can be followed.

kcbland · Post by **kcbland** » Tue Mar 21, 2006 9:17 am

There's no "compression" stage. You'll have to find a compression algorithm and write it as a DS function.

parag.s.27 · Post by **parag.s.27** » Tue Mar 21, 2006 9:29 am

Hi,

Thanks for all your help, i am now trying to write a routine with compression algo, that compresses the image.

Thanks for quick help

gateleys · Post by **gateleys** » Tue Mar 21, 2006 4:13 pm

parag.s.27 wrote:Hi,

Thanks for all your help, i am now trying to write a routine with compression algo, that compresses the image.

Thanks for quick help

Please share it with us via this forum when you are done.

gateleys

kcbland · Post by **kcbland** » Tue Mar 21, 2006 4:27 pm

I sure hope that compression algorithm is understood by whatever looks at that column of data. Taking "jpeg" data and compressing it with an lzw algorithm means you no longer have jpeg data, but lzw. If you're expecting lzw data to show as a picture, you'll first have to un-lzw it to get it back to jpeg. This means that the compression algorithm has to be also used by any queries when getting the data.

parag.s.27 · Post by **parag.s.27** » Wed Mar 22, 2006 4:09 am

Hi,

i had downloaded a C algorithm for image compression from the net and trying to implement it in the datastage routine, currently i did'nt get any success but i am trying to rewrite that algorithm in BASIC format.