topic Re: Image scaling in Intel® Integrated Performance Primitives

Image scaling

madhu_lsu — Mon, 15 Nov 2004 07:57:37 GMT

Hi,

I'm trying to scale the pixel intensities of an image between [0 - maxValue]. But I experience tremendous rounding error with the operation. I'm attaching the code snippet. I would appreciate if anyone can tell me if there is something I can do about it.

Ipp8u maxValue, minValue;
ippiMin_8u_C1R(inputImageUSC, imgSize.width, imgSize, &minValue);

ippiSubC_8u_C1RSfs(inputImageUSC, imgSize.width, minValue, outputImageUSC,imgSize.width, imgSize, 0);

ippiMax_8u_C1R(inputImageUSC, imgSize.width, imgSize, &maxValue);

ippiDivC_8u_C1IRSfs(maxValue, outputImageUSC, imgSize.width, imgSize, 0);

maxValue = 255;
ippiMulC_8u_C1IRSfs(maxValue, outputImageUSC, imgSize.width, imgSize, 0);

Thanks very much,

Madhu.

Re: Image scaling

Ying_S_Intel — Wed, 17 Nov 2004 08:02:16 GMT

You may contact us via Intel Premier Support for issue resolution, please submit a detailed report with your test case, so we can look into it.

Thanks,
Ying

Re: Image scaling

borix — Wed, 24 Nov 2004 02:15:06 GMT

Madhu, can you call ippiScale function?

Re: Image scaling

ids-removed222 — Thu, 25 Nov 2004 10:43:09 GMT

MulC

I done with it