topic Resize without interpolation in Intel® Integrated Performance Primitives

Resize without interpolation

cultzero — Wed, 09 May 2007 11:55:00 GMT

Hi! Is there any way to implement resizing of image without any interpolation, or in other words with zero-padding interpolation. I'l try to explain. If we have original image I1(x,y) then the resulting image would be I2(Sx*x,Sy*y)=I1(x,y) and zero for other pixels of resulting image, and Sx,Sy are scale coefficients, something like that. Or maby there is way to add one more interpolation option to IppiResize function?. I need it to implement Undecimated Wavelet Transform.Thanks.

Re: Resize without interpolation

Vladimir_Dudnik — Mon, 14 May 2007 18:06:08 GMT

Hello,

you can use ippsSampleUp and ippsSampleDown functions for image rows. Vertical resampling can be done through n-row periodical decimation.

Note, there is wavelet functions in IPP, please see manual for more details.

Regards,
Vladimir

Re: Resize without interpolation

cultzero — Thu, 17 May 2007 11:36:07 GMT

Hello now I understood how to do it. I didn't thought that I can use IPPs functions for image, but now I understand that I can. Thanks a lot. About note: I'm using wavelet functions in Ippi domain, but I need to sample up result of ippiWTFwd_32f_C1R since I'm implementing undecimated wavelet transform. Thanks again.