Resampling of 8-bit grayscale images

[Satish_Kaveti]

Hi,

I am currently using ippiResize_8u_C1R for resampling the 8-bit grayscale image. I need to resample only by integer factors, usually 4 or 8. Is there any other function which is faster for resampling of 8-bit grayscale images ?

Thanks,

Satish

[Ying_H_Intel]

Hi Satish,

Checking the IPP manual ippiman.pdf, it seems to me, expectippiResize function, no more resampling function can do this. Butuse ippiResizeSqrPixelwill fasterif you are run the appliction on Muliticore processor.

Please see the discription about the ippiResize in Doc or KB: Deprecated API list since Intel IPP v6.0

CAUTION. THIS FUNCTION IS DEPRECATED. Please use the function ippiResizeSqr-
Pixel instead.

Regards,

Ying

[matthieu_darbois]

Hi,
If you only want subsampling, you can do a 4x4 subsampling using ippiCopy_8u_C4C1R,
with a source step which is 4 times the original step. The roiSize is the destination size.

Regards,

Matthieu