contrib/brl/bseg/vpro/vpro_fourier_process.cxx Source File

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00001 #include "vpro_fourier_process.h"
00002 //:
00003 // \file
00004 #include <vcl_iostream.h>
00005 #include <brip/brip_vil1_float_ops.h>
00006 #include <vil1/vil1_memory_image_of.h>
00007 
00008 bool vpro_fourier_process::execute()
00009 {
00010   if (this->get_N_input_images()!=1)
00011   {
00012     vcl_cout << "In vpro_fourier_process::execute() -"
00013              << " not at exactly one input image\n";
00014     return false;
00015   }
00016   vil1_image img = vpro_video_process::get_input_image(0);
00017   this->clear_input();
00018 
00019   vil1_memory_image_of<float> fimg = brip_vil1_float_ops::convert_to_float(img);
00020   vil1_memory_image_of<float> pow_two_img;
00021   brip_vil1_float_ops::resize_to_power_of_two(fimg, pow_two_img);
00022   //compute fourier transform
00023   vil1_memory_image_of<float> mag, phase;
00024   brip_vil1_float_ops::fourier_transform(pow_two_img, mag, phase);
00025 
00026   //convert magnitude component to byte
00027   output_image_ = brip_vil1_float_ops::convert_to_byte(mag, -range_, range_);
00028   return true;
00029 }