DGtal 1.3.0
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testSegmentComputerEstimators.cpp
1
33#include <iostream>
34#include <cmath>
35#include "DGtal/base/Common.h"
36
37
38#include "DGtal/geometry/curves/ArithmeticalDSSComputer.h"
39#include "DGtal/geometry/curves/StabbingCircleComputer.h"
40#include "DGtal/geometry/curves/estimation/SegmentComputerEstimators.h"
41
42#include "DGtal/io/boards/Board2D.h"
43
44
45#include "ConfigTest.h"
46
48
49using namespace std;
50using namespace DGtal;
51using namespace LibBoard;
52
54// Functions for testing classes in SegmentComputerEstimators.h.
56
57
62template<typename DSSComputer>
63bool testTangentFromDSS(
64 const typename DSSComputer::ConstIterator& itb,
65 const typename DSSComputer::ConstIterator& ite )
66{
67
68
69 trace.info() << "feeding segment computer " << endl;
70
71 DSSComputer dss;
72 DGtal::longestSegment( dss, itb, ite );
73
74 trace.info() << dss << endl;
75 trace.info() << endl;
76
77 trace.info() << "building and using the functor " << endl;
78 const double epsilon = 0.00001;
79
80 int nb = 0;
81 int nbok = 0;
82
83 { //angle
85 f.attach(dss);
86 double q1 = f.eval(itb);
87 double q2 = std::atan2((double)dss.a(),(double)dss.b());
88 trace.info() << "Tangent orientation : " << q1 << " == " << q2 << endl;
89 nbok += (std::abs(q1 - q2) < epsilon)?1:0;
90 nb++;
91 trace.info() << "(" << nbok << "/" << nb << ")" << std::endl;
92 }
93
94 { //vector
97 f.attach(dss);
98 Quantity q1 = f.eval(itb);
99 Quantity q2 = Quantity(dss.b(), dss.a());
100 trace.info() << "Tangent vector : " << q1 << " == " << q2 << endl;
101 nbok += (q1 == q2)?1:0;
102 nb++;
103 trace.info() << "(" << nbok << "/" << nb << ")" << std::endl;
104 }
105
106 { //unit vector
108 typedef typename TangentFromDSSEstimator<DSSComputer>::Quantity Quantity;
109 f.attach(dss);
110 Quantity q1 = f.eval(itb);
111 double n = std::sqrt( (double)dss.a()*dss.a() + (double)dss.b()*dss.b() );
112 Quantity q2 = Quantity((double)dss.b()/n, (double)dss.a()/n);
113 trace.info() << "Normalized tangent vector : " << q1 << " == " << q2 << endl;
114 nbok += ((std::abs(q1[0] - q2[0]) < epsilon)&&(std::abs(q1[1] - q2[1]) < epsilon))?1:0;
115 nb++;
116 trace.info() << "(" << nbok << "/" << nb << ")" << std::endl;
117 }
118
119 return (nb == nbok);
120}
121
126template<typename DCAComputer>
127bool testFromDCA(
128 const typename DCAComputer::ConstIterator& itb,
129 const typename DCAComputer::ConstIterator& ite )
130{
131
132
133 trace.info() << "feeding segment computer " << endl;
134
135 DCAComputer dca;
136 DGtal::longestSegment( dca, itb, ite );
137
138 trace.info() << dca << endl;
139 trace.info() << endl;
140
141 trace.info() << "building and using the functor " << endl;
142 const double epsilon = 0.00001;
143
144 int nb = 0;
145 int nbok = 0;
146
147 { //curvature
149 f.init(1.0, itb, ite);
150 f.attach(dca);
151 double q1 = f.eval(itb);
152 f.init(0.1, itb, ite);
153 double q2 = f.eval(itb);
154 trace.info() << "Curvature (h=1): " << q1 << std::endl;
155 trace.info() << "Curvature (h=0.1): " << q2 << std::endl;
156 nbok += ((q1 >= 0)&&(q1 < 1)&&(q2 >= 0)&&(q2 < 10)
157 &&(std::abs(q2-(10*q1)) < epsilon))?1:0;
158 nb++;
159 trace.info() << "(" << nbok << "/" << nb << ")" << std::endl;
160 }
161
162 { //tangent
164 f.attach(dca);
165 typedef typename TangentFromDCAEstimator<DCAComputer>::Quantity Quantity;
166 typename DCAComputer::ConstIterator it = DGtal::getMiddleIterator(itb, ite);
167 Quantity q1 = f.eval( it );
168 trace.info() << "Tangent: " << q1 << " == [PointVector] {1, 0} " << std::endl;
169 nbok += (std::abs(q1[0]-1.0) < epsilon)
170 && (std::abs(q1[1]) < epsilon) ? 1 : 0;
171 nb++;
172 trace.info() << "(" << nbok << "/" << nb << ")" << std::endl;
173 }
174
175 { //position
177 typedef typename DistanceFromDCAEstimator<DCAComputer>::Quantity Quantity;
178 typename DCAComputer::ConstIterator it = DGtal::getMiddleIterator(itb, ite);
179 f.init(1.0, itb, ite);
180 f.attach(dca);
181 Quantity q1 = f.eval( it );
182 trace.info() << "Position (h=1): " << q1.first << " (<=0), " << q1.second << " (>0) " << std::endl;
183 f.init(0.1, itb, ite);
184 f.attach(dca);
185 Quantity q2 = f.eval( it );
186 trace.info() << "Position (h=0.1): " << q2.first << " (<=0), " << q2.second << " (>0) " << std::endl;
187 nbok += ( (q1.first < epsilon)
188 && (q1.second > -epsilon)
189 && (std::abs((q1.second - q1.first) - 1) < epsilon)
190 && (q2.first < epsilon)
191 && (q2.second > -epsilon)
192 && (std::abs((q2.second - q2.first) - 0.1) < epsilon) )? 1 : 0;
193 nb++;
194 trace.info() << "(" << nbok << "/" << nb << ")" << std::endl;
195 }
196
197 return (nb == nbok);
198}
199
200
202// Standard services - public :
203
204int main( int argc, char** argv )
205{
206 trace.beginBlock ( "Testing segment computer functors" );
207 trace.info() << "Args:";
208 for ( int i = 0; i < argc; ++i )
209 trace.info() << " " << argv[ i ];
210 trace.info() << endl;
211
212 bool res = true;
213
214 //types
216
217
218 //------------------------------------------ DSS
219 {
220 typedef std::vector<Point> Range;
221 typedef Range::iterator ConstIterator;
224
225 //input points
226 Range curve4;
227 curve4.push_back(Point(0,0));
228 curve4.push_back(Point(1,0));
229 curve4.push_back(Point(1,1));
230 curve4.push_back(Point(2,1));
231 curve4.push_back(Point(3,1));
232 curve4.push_back(Point(3,2));
233 curve4.push_back(Point(4,2));
234 curve4.push_back(Point(5,2));
235 curve4.push_back(Point(6,2));
236 curve4.push_back(Point(6,3));
237 curve4.push_back(Point(7,3));
238
239 Range curve8;
240 curve8.push_back(Point(0,0));
241 curve8.push_back(Point(1,1));
242 curve8.push_back(Point(2,1));
243 curve8.push_back(Point(3,2));
244 curve8.push_back(Point(4,2));
245 curve8.push_back(Point(5,2));
246 curve8.push_back(Point(6,3));
247 curve8.push_back(Point(7,3));
248 curve8.push_back(Point(8,4));
249 curve8.push_back(Point(9,4));
250 curve8.push_back(Point(10,5));
251
252 //tests
253 res = res && testTangentFromDSS<DSS4>(curve4.begin(), curve4.end())
254 && testTangentFromDSS<DSS8>(curve8.begin(), curve8.end());
255 }
256 //------------------------------------------ DCA
257 {
258 typedef std::pair<Point,Point> Pair;
259 typedef std::vector<Pair> Range;
260 typedef Range::const_iterator ConstIterator;
262
263 Range curve;
264 curve.push_back(std::make_pair(Point(0,0),Point(0,1)));
265 curve.push_back(std::make_pair(Point(1,0),Point(1,1)));
266
267 curve.push_back(std::make_pair(Point(2,1),Point(2,2)));
268 curve.push_back(std::make_pair(Point(3,1),Point(3,2)));
269 curve.push_back(std::make_pair(Point(4,1),Point(4,2)));
270
271 curve.push_back(std::make_pair(Point(5,2),Point(5,3)));
272 curve.push_back(std::make_pair(Point(6,2),Point(6,3)));
273 curve.push_back(std::make_pair(Point(7,2),Point(7,3)));
274 curve.push_back(std::make_pair(Point(8,2),Point(8,3)));
275 curve.push_back(std::make_pair(Point(9,2),Point(9,3)));
276
277 curve.push_back(std::make_pair(Point(10,1),Point(10,2)));
278 curve.push_back(std::make_pair(Point(11,1),Point(11,2)));
279 curve.push_back(std::make_pair(Point(12,1),Point(12,2)));
280
281 curve.push_back(std::make_pair(Point(13,0),Point(13,1)));
282 curve.push_back(std::make_pair(Point(14,0),Point(14,1)));
283
284 res = res && testFromDCA<DCA>(curve.begin(), curve.end())
285 && testFromDCA<DCA>(curve.begin()+2, curve.begin()+12);
286 }
287
288 //----------------------------------------------------------
289 trace.emphase() << ( res ? "Passed." : "Error." ) << endl;
290 trace.endBlock();
291
292 return res ? 0 : 1;
293}
294// //
Aim: This class is a wrapper around ArithmeticalDSS that is devoted to the dynamic recognition of dig...
Aim: Implements basic operations that will be used in Point and Vector classes.
Definition: PointVector.h:593
Aim: model of CBidirectionalRangeFromPoint that adapts any range of elements bounded by two iterators...
Aim: On-line recognition of a digital circular arcs (DCA) defined as a sequence of connected grid edg...
void beginBlock(const std::string &keyword="")
std::ostream & emphase()
std::ostream & info()
double endBlock()
void init(const double h, const ConstIterator &itb, const ConstIterator &ite)
MyDigitalSurface::ConstIterator ConstIterator
DGtal is the top-level namespace which contains all DGtal functions and types.
void longestSegment(SC &s, const typename SC::ConstIterator &i, const typename SC::ConstIterator &end, IteratorType)
IC getMiddleIterator(const IC &itb, const IC &ite, RandomAccessCategory)
Trace trace
Definition: Common.h:154
STL namespace.
Struct representing a 2D point.
Definition: Point.h:27
int main()
Definition: testBits.cpp:56