https://doi.org/10.5201/ipol.2019.269
Tip revision: 2088cf2f69747cf62d6c7224652ae752b134b33a authored by Software Heritage on 26 June 2019, 00:00:00 UTC
ipol: Deposit 1349 in collection ipol
ipol: Deposit 1349 in collection ipol
Tip revision: 2088cf2
test_extract.cpp
// SPDX-License-Identifier: GPL-3.0-or-later
/**
* @file test_extract.cpp
* @brief Test extraction of level lines on toy examples
*
* (C) 2019, Pascal Monasse <pascal.monasse@enpc.fr>
*/
#include "levelLine.h"
#include "cmdLine.h"
#include <sstream>
static const unsigned char image1[4*4]= {
0, 0, 0, 0,
0, 0,12, 0,
0, 5, 2, 0,
0, 0, 0, 0
};
// Saddle value: 4
static const unsigned char image2[4*4]= {
20,20,20,20,
20, 0,12,20,
20, 5, 2,20,
20,20,20,20
};
// Saddle value: 4
static const unsigned char image3[4*4]= {
0, 0, 0, 0,
0, 0,12, 0,
0, 2, 8, 0,
0, 0, 0, 0
};
// Saddle value: 4, saddle point outside
void test_image(const unsigned char* im,size_t w,size_t h,float level,int ppp) {
for(size_t i=0; i<h; i++) {
for(size_t j=0; j<w; j++)
std::cout << "\t" << (int)im[i*w+j];
std::cout << std::endl;
}
std::vector<LevelLine*> ll;
extract(im,w,h, level, 256.0f, ppp, ll);
for(std::vector<LevelLine*>::iterator it=ll.begin();it!=ll.end();++it) {
std::cout << **it << std::endl;
delete *it;
}
}
int main(int argc, char** argv) {
CmdLine cmd;
int ppp=5;
cmd.add( make_option('p',ppp).doc("points per pixel") );
cmd.process(argc,argv);
if(argc>2) {
std::cerr << "Usage: " << argv[0] << " level" << std::endl;
std::cerr << cmd;
return 1;
}
float level=4.0f;
if(argc>1) {
std::istringstream str(argv[1]);
str >> level;
if(str.fail()) {
std::cerr<< "Parameter must be a floating point number" <<std::endl;
return 1;
}
} else std::cout << "Default level: " << level << std::endl;
std::cout << "image 1: saddle level at 4, two lines" << std::endl;
test_image(image1,4,4, level, ppp);
std::cout << "image 2: saddle level at 4, single line" << std::endl;
test_image(image2,4,4, level, ppp);
std::cout << "image 3: saddle level at 4, saddle pt outside" << std::endl;
test_image(image3,4,4, level, ppp);
return 0;
}