6dcc460e
 Tianshu Cheng
cPb+tPb
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#include <stim/image/image.h>
#include <cmath>
#include <stim/visualization/colormap.h>
#include <stim/image/image_contour_detection.h>
#include <iostream>
#include <stim/visualization/colormap.h>
/// calculate the cPb, tPb and mPb given a multi-channel image
void array_multiply(float* lhs, float rhs, unsigned int N);
void array_add(float* ptr1, float* ptr2, float* sum, unsigned int N);
int main()
{
stim::image<float> image; // generate an image object
image.load("101085.bmp"); // load the input image
//image.load("slice00_500_500.bmp"); // load the input image
image = image.channel(0); // get the first channel of black-and-white image
unsigned int w = image.width(); // get the width of picture
unsigned int h = image.height(); // get the height of picture
unsigned int N = w * h; // get the number of pixels
int c = image.channels(); // get the number if channels of picture
int s = 3; // set the number of scales
int r1[3] = {3,5,10}; // set an array of radii for different scaled discs(filters) for cPb, the length of r is c*s
int r2[3] = {5,10,20}; // set an array of radii for different scaled discs(filters) for tPb, the length of r is c*s
float alpha[3] = {1,1,1}; // set an array of weights for different scaled discs(filters)
unsigned int theta_n = 8; // set the number of angles used in filter orientation
unsigned int bin_n = 16; // set the number of bins used in chi-distance
unsigned int K = 16; // set the number of cludters, K should be multiple of bin_n
stim::image<float> img_cPb(w, h); // allocate the space for cPb
stim::image<float> img_tPb(w, h); // allocate the space for tPb
stim::image<float> img_mPb(w, h); // allocate the space for tPb
std::cout<<"imagesize: "<< w <<"*"<< h <<'\n';
//*******************cPb********************
std::cout<<"begin cPb"<<'\n';
std::clock_t start1; // (optional) set the timer to calculate the total time
start1 = std::clock(); // (optional) set timer start point
img_cPb = cPb(image, r1, alpha, s);
// show the cPb (optional)
stim::cpu2image(img_cPb.data(), "data_output/img_cPb_0925.bmp", w, h, stim::cmBrewer);
double duration1 = ( std::clock() - start1 ) / (double) CLOCKS_PER_SEC; // (optional) calculate the total time
std::cout<<"cPb time: "<< duration1 <<"s"<<'\n'; // (optional) show the total time
//*******************tPb********************
std::cout<<"begin tPb"<<'\n';
std::clock_t start2; // (optional) set the timer to calculate the total time
start2 = std::clock(); // (optional) set timer start point
img_tPb = tPb(image, r2, alpha, theta_n, bin_n, s, K);
// show the tPb (optional)
stim::cpu2image(img_tPb.data(), "data_output/img_tPb_0925.bmp", w, h, stim::cmBrewer);
double duration2 = ( std::clock() - start2 ) / (double) CLOCKS_PER_SEC; // (optional) calculate the total time
std::cout<<"tPb time: "<< duration2 <<"s"<<'\n'; // (optional) show the total time
//*******************************************
double duration3 = ( std::clock() - start1 ) / (double) CLOCKS_PER_SEC; // (optional) calculate the total time
std::cout<<"total running time: "<< duration3 <<"s"<<'\n'; // (optional) show the total time
//******************mPb**********************
// set parameters for linear combination
float a = 1;
float b = 0.5;
// create mPb by linearly combined cPb and tPb
array_multiply(img_cPb.data(), a, N);
array_multiply(img_tPb.data(), b, N);
array_add(img_cPb.data(), img_tPb.data(), img_mPb.data(), N);
// show the mPb (optional)
stim::cpu2image(img_mPb.data(), "data_output/img_mPb_0925.bmp", w, h, stim::cmBrewer);
return 0;
}
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