Discrete Fourier Transform 2 is labeled instead of normalized

Core Function: cvdft

Program:

650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M02/45/D4/wKioL1PsKuKgMhUzAADLkNsp1PQ852.jpg "Title =" clipboard.png "alt =" wkiol1pskukgmhuzaadlknsp1pq852.jpg "/>

Code:

# Include "CV. H "# include" cxcore. H "# include" highgui. H "# include <iostream> int dft2 (INT argc, char ** argv) // Discrete Fourier Transform (discrete Fourier transform, abbreviated to DFT) {iplimage * src = cvloadimage ("E: \ picture \ 4.jpg", 0); iplimage * src32f = cvcreateimage (cvgetsize (SRC), ipl_depth_32f, 1 ); iplimage * dst32f = cvcreateimage (cvgetsize (SRC), ipl_depth_32f, 1); iplimage * dst32f_inverse = cvcreateimage (cvgetsize (SRC), ipl_depth_32f, 1 ); iplimage * dftresult_32f = cvcreateimage (cvgetsize (SRC), ipl_depth_32f, 1); iplimage * dftresult = cvcreateimage (cvgetsize (SRC), 8, 1 ); iplimage * src2 = cvcreateimage (cvgetsize (SRC), 8, 1); cvconvertscale (SRC, src32f); cvdft (src32f, dst32f, cv_dxt_forward); cvdft (dst32f, direction, cv_dxt_inverse | cv_dxt_scale); // cvconvertscale (dst32f_inverse, src2) is not normalized with cv_dxt_scale; // The Fourier transformation result is normalized to display the result double maxval = 0; double minval = 0; cvminmaxloc (dst32f, & minval, & maxval); double scale = 255/(maxval-minval); double shift =-minval * scale; cvconvertscale (dst32f, dftresult_32f, scale, shift); // convert the normalized welfare leaf transformation result to eight bits to display cvconvertscale (dftresult_32f, dftresult); cvminmaxloc (dftresult, & minval, & maxval ); STD: cout <"dftresult MAX:" <maxval <"dftresult MAX:" <minval <STD: Endl; cvnamedwindow ("src "); cvnamedwindow ("src2"); cvnamedwindow ("dftresult"); cvshowimage ("src", Src); cvshowimage ("src2", src2); cvshowimage ("dftresult ", dftresult); cvwaitkey (0); cvdestroywindow ("src"); cvdestroywindow ("src2"); cvdestroywindow ("dftresult"); cvreleaseimage (& SRC ); cvreleaseimage (& src2); cvreleaseimage (& dftresult); Return 0 ;}

This article is from the "flyclc" blog, please be sure to keep this source http://flyclc.blog.51cto.com/1385758/1539814