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The word "overlap" was used to describe the concept of a rectangle

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matching with a truth rectangle as well as overlap in the context of
non-max suppression of results.  Since these are two very separate
ideas I renamed some things to avoid any confusion.
This commit is contained in:
Davis King 2011-12-25 22:46:56 -05:00
parent 87366f5171
commit c0d38e4d6d
4 changed files with 61 additions and 58 deletions
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16
dlib/svm/structural_object_detection_trainer.h
View File

@ -45,7 +45,7 @@ namespace dlib
eps = 0.3;
num_threads = 2;
max_cache_size = 40;
overlap_eps = 0.5;
match_eps = 0.5;
loss_per_missed_target = 1;
loss_per_false_alarm = 1;
@ -155,25 +155,25 @@ namespace dlib
return C;
}
void set_overlap_eps (
void set_match_eps (
double eps
)
{
// make sure requires clause is not broken
DLIB_ASSERT(0 < eps && eps < 1,
"\t void structural_object_detection_trainer::set_overlap_eps(eps)"
"\t void structural_object_detection_trainer::set_match_eps(eps)"
<< "\n\t Invalid inputs were given to this function "
<< "\n\t eps: " << eps
<< "\n\t this: " << this
);
overlap_eps = eps;
match_eps = eps;
}
double get_overlap_eps (
double get_match_eps (
) const
{
return overlap_eps;
return match_eps;
}
double get_loss_per_missed_target (
@ -244,7 +244,7 @@ namespace dlib
svm_prob.set_c(C);
svm_prob.set_epsilon(eps);
svm_prob.set_max_cache_size(max_cache_size);
svm_prob.set_overlap_eps(overlap_eps);
svm_prob.set_match_eps(match_eps);
svm_prob.set_loss_per_missed_target(loss_per_missed_target);
svm_prob.set_loss_per_false_alarm(loss_per_false_alarm);
matrix<double,0,1> w;
@ -265,7 +265,7 @@ namespace dlib
double C;
oca solver;
double eps;
double overlap_eps;
double match_eps;
bool verbose;
unsigned long num_threads;
unsigned long max_cache_size;

16
dlib/svm/structural_object_detection_trainer_abstract.h
View File

@ -55,7 +55,7 @@ namespace dlib
- #get_epsilon() == 0.3
- #get_num_threads() == 2
- #get_max_cache_size() == 40
- #get_overlap_eps() == 0.5
- #get_match_eps() == 0.5
- #get_loss_per_missed_target() == 1
- #get_loss_per_false_alarm() == 1
- This object will attempt to learn a model for the given
@ -190,25 +190,25 @@ namespace dlib
better generalization.
!*/
void set_overlap_eps (
void set_match_eps (
double eps
);
/*!
requires
- 0 < eps < 1
ensures
- #get_overlap_eps() == eps
- #get_match_eps() == eps
!*/
double get_overlap_eps (
double get_match_eps (
) const;
/*!
ensures
- returns the amount of overlap necessary for a detection to be considered
as overlapping with a ground truth rectangle. If it doesn't overlap then
- returns the amount of alignment necessary for a detection to be considered
as matching with a ground truth rectangle. If it doesn't match then
it is considered to be a false alarm. To define this precisely, let
A and B be two rectangles, then A and B overlap if and only if:
A.intersect(B).area()/(A+B).area() > get_overlap_eps()
A and B be two rectangles, then A and B match if and only if:
A.intersect(B).area()/(A+B).area() > get_match_eps()
!*/
double get_loss_per_missed_target (

64
dlib/svm/structural_svm_object_detection_problem.h
View File

@ -43,7 +43,7 @@ namespace dlib
boxes_overlap(overlap_tester),
images(images_),
truth_rects(truth_rects_),
overlap_eps(0.5),
match_eps(0.5),
loss_per_false_alarm(1),
loss_per_missed_target(1)
{
@ -68,25 +68,25 @@ namespace dlib
max_num_dets = max_num_dets*3 + 10;
}
void set_overlap_eps (
void set_match_eps (
double eps
)
{
// make sure requires clause is not broken
DLIB_ASSERT(0 < eps && eps < 1,
"\t void structural_svm_object_detection_problem::set_overlap_eps(eps)"
"\t void structural_svm_object_detection_problem::set_match_eps(eps)"
<< "\n\t Invalid inputs were given to this function "
<< "\n\t eps: " << eps
<< "\n\t this: " << this
);
overlap_eps = eps;
match_eps = eps;
}
double get_overlap_eps (
double get_match_eps (
) const
{
return overlap_eps;
return match_eps;
}
double get_loss_per_missed_target (
@ -199,25 +199,25 @@ namespace dlib
}
}
// make sure the mapped rectangles are within overlap_eps of the
// make sure the mapped rectangles are within match_eps of the
// truth rectangles.
for (unsigned long i = 0; i < mapped_rects.size(); ++i)
{
const double area = (truth_rects[idx][i].intersect(mapped_rects[i])).area();
const double total_area = (truth_rects[idx][i] + mapped_rects[i]).area();
if (area/total_area <= overlap_eps)
if (area/total_area <= match_eps)
{
using namespace std;
ostringstream sout;
sout << "An impossible set of object labels was detected. This is happening because ";
sout << "none of the sliding window detection templates is capable of matching the size ";
sout << "and/or shape of one of the ground truth rectangles to within the required overlap_eps ";
sout << "amount of overlap. To resolve this you need to either lower the overlap_eps, add ";
sout << "and/or shape of one of the ground truth rectangles to within the required match_eps ";
sout << "amount of alignment. To resolve this you need to either lower the match_eps, add ";
sout << "another detection template which can match the offending rectangle, or adjust the ";
sout << "offending truth rectangle so it can be matched by an existing detection template. ";
sout << "It is also possible that the image pyramid you are using is too coarse. E.g. if one of ";
sout << "your existing detection templates has a matching width/height ratio and smaller area than the offending ";
sout << "rectangle then a finer image pyramid would probably help.";
sout << "your existing detection templates has a matching width/height ratio and smaller area ";
sout << "than the offending rectangle then a finer image pyramid would probably help.";
// make sure the above string fits nicely into a command prompt window.
@ -225,8 +225,8 @@ namespace dlib
sout.str(""); sout << wrap_string(temp,0,0) << endl << endl;
sout << "image index "<< idx << endl;
sout << "overlap_eps: "<< overlap_eps << endl;
sout << "best possible overlap: "<< area/total_area << endl;
sout << "match_eps: "<< match_eps << endl;
sout << "best possible match: "<< area/total_area << endl;
sout << "truth rect: "<< truth_rects[idx][i] << endl;
sout << "truth rect width/height: "<< truth_rects[idx][i].width()/(double)truth_rects[idx][i].height() << endl;
sout << "truth rect area: "<< truth_rects[idx][i].area() << endl;
@ -272,13 +272,13 @@ namespace dlib
if (overlaps_any_box(final_dets, dets[i].second))
continue;
const std::pair<double,unsigned int> truth = find_max_overlap(truth_rects[idx], dets[i].second);
const std::pair<double,unsigned int> truth = find_best_match(truth_rects[idx], dets[i].second);
final_dets.push_back(dets[i].second);
const double truth_overlap = truth.first;
const double truth_match = truth.first;
// if hit truth rect
if (truth_overlap > overlap_eps)
if (truth_match > match_eps)
{
// if this is the first time we have seen a detect which hit truth_rects[truth.second]
const double score = dets[i].first - thresh;
@ -302,10 +302,10 @@ namespace dlib
if (overlaps_any_box(final_dets, dets[i].second))
continue;
const std::pair<double,unsigned int> truth = find_max_overlap(truth_rects[idx], dets[i].second);
const std::pair<double,unsigned int> truth = find_best_match(truth_rects[idx], dets[i].second);
const double truth_overlap = truth.first;
if (truth_overlap > overlap_eps)
const double truth_match = truth.first;
if (truth_match > match_eps)
{
if (truth_score_hits[truth.second] >= 0)
{
@ -351,22 +351,22 @@ namespace dlib
return false;
}
std::pair<double,unsigned int> find_max_overlap(
std::pair<double,unsigned int> find_best_match(
const std::vector<rectangle>& boxes,
const rectangle rect
) const
/*!
ensures
- determines which rectangle in boxes overlaps rect the most and
returns the amount of this overlap. Specifically, the overlap is
- determines which rectangle in boxes matches rect the most and
returns the amount of this match. Specifically, the match is
a number O with the following properties:
- 0 <= O <= 1
- Let R be the maximum overlap rectangle in boxes, then
O == (R.intersect(rect)).area() / (R + rect).area
- O == 0 if there is no overlap with any rectangle.
- Let R be the maximum matching rectangle in boxes, then
O == (R.intersect(rect)).area() / (R + rect).area()
- O == 0 if there is no match with any rectangle.
!*/
{
double overlap = 0;
double match = 0;
unsigned int best_idx = 0;
for (unsigned long i = 0; i < boxes.size(); ++i)
{
@ -374,16 +374,16 @@ namespace dlib
const unsigned long area = rect.intersect(boxes[i]).area();
if (area != 0)
{
const double new_overlap = area / static_cast<double>((rect + boxes[i]).area());
if (new_overlap > overlap)
const double new_match = area / static_cast<double>((rect + boxes[i]).area());
if (new_match > match)
{
overlap = new_overlap;
match = new_match;
best_idx = i;
}
}
}
return std::make_pair(overlap,best_idx);
return std::make_pair(match,best_idx);
}
@ -396,7 +396,7 @@ namespace dlib
const std::vector<std::vector<rectangle> >& truth_rects;
unsigned long max_num_dets;
double overlap_eps;
double match_eps;
double loss_per_false_alarm;
double loss_per_missed_target;
};

23
dlib/svm/structural_svm_object_detection_problem_abstract.h
View File

@ -68,12 +68,12 @@ namespace dlib
Then the loss for a particular labeling is the quantity:
FA*get_loss_per_false_alarm() + MT*get_loss_per_missed_target()
A detection is considered a false alarm if it doesn't overlap with any
A detection is considered a false alarm if it doesn't match with any
of the ground truth rectangles or if it is a duplicate detection of a
truth rectangle. Finally, for the purposes of calculating loss, overlap
is determined using the following formula, rectangles A and B overlap
truth rectangle. Finally, for the purposes of calculating loss, a match
is determined using the following formula, rectangles A and B match
if and only if:
A.intersect(B).area()/(A+B).area() > get_overlap_eps()
A.intersect(B).area()/(A+B).area() > get_match_eps()
!*/
public:
@ -98,7 +98,7 @@ namespace dlib
object_detector<image_scanner_type,overlap_tester_type> detector(scanner,overlap_tester,w)
results in a detector object which attempts to compute the following mapping:
truth_rects[i] == detector(images[i])
- #get_overlap_eps() == 0.5
- #get_match_eps() == 0.5
- This object will use num_threads threads during the optimization
procedure. You should set this parameter equal to the number of
available processing cores on your machine.
@ -106,22 +106,25 @@ namespace dlib
- #get_loss_per_false_alarm() == 1
!*/
void set_overlap_eps (
void set_match_eps (
double eps
);
/*!
requires
- 0 < eps < 1
ensures
- #get_overlap_eps() == eps
- #get_match_eps() == eps
!*/
double get_overlap_eps (
double get_match_eps (
) const;
/*!
ensures
- returns the amount of overlap necessary for a detection to be considered
as overlapping with a ground truth rectangle.
- returns the amount of alignment necessary for a detection to be considered
as matching with a ground truth rectangle. The precise formula for determining
if two rectangles match each other is the following, rectangles A and B match
if and only if:
A.intersect(B).area()/(A+B).area() > get_match_eps()
!*/
double get_loss_per_missed_target (