Blender  V3.3
hybrid_region_tracker.cc
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1 // Copyright (c) 2011 libmv authors.
2 //
3 // Permission is hereby granted, free of charge, to any person obtaining a copy
4 // of this software and associated documentation files (the "Software"), to
5 // deal in the Software without restriction, including without limitation the
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7 // sell copies of the Software, and to permit persons to whom the Software is
8 // furnished to do so, subject to the following conditions:
9 //
10 // The above copyright notice and this permission notice shall be included in
11 // all copies or substantial portions of the Software.
12 //
13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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18 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 // IN THE SOFTWARE.
20 
22 
23 #include "libmv/image/convolve.h"
24 #include "libmv/image/image.h"
25 #include "libmv/image/sample.h"
26 #include "libmv/logging/logging.h"
27 
28 namespace libmv {
29 
31  const FloatImage& image2,
32  double x1,
33  double y1,
34  double* x2,
35  double* y2) const {
36  double x2_coarse = *x2;
37  double y2_coarse = *y2;
38  if (!coarse_tracker_->Track(image1, image2, x1, y1, &x2_coarse, &y2_coarse)) {
39  LG << "Coarse tracker failed.";
40  return false;
41  }
42 
43  double x2_fine = x2_coarse;
44  double y2_fine = y2_coarse;
45  if (!fine_tracker_->Track(image1, image2, x1, y1, &x2_fine, &y2_fine)) {
46  LG << "Fine tracker failed.";
47  return false;
48  }
49 
50  // Calculate the shift done by the fine tracker.
51  double dx2 = x2_coarse - x2_fine;
52  double dy2 = y2_coarse - y2_fine;
53  double fine_shift = sqrt(dx2 * dx2 + dy2 * dy2);
54 
55  LG << "Refinement: dx=" << dx2 << " dy=" << dy2 << ", d=" << fine_shift;
56 
57  // If the fine tracker shifted the window by more than a pixel, then
58  // something bad probably happened and we should give up tracking.
59  if (fine_shift < 2.0) {
60  LG << "Refinement small enough; success.";
61  *x2 = x2_fine;
62  *y2 = y2_fine;
63  return true;
64  }
65  LG << "Refinement was too big; failing.";
66  return false;
67 }
68 
69 } // namespace libmv
sqrt(x)+1/max(0
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3D array (row, column, channel).
Definition: array_nd.h:325
virtual bool Track(const FloatImage &image1, const FloatImage &image2, double x1, double y1, double *x2, double *y2) const
scoped_ptr< RegionTracker > fine_tracker_
scoped_ptr< RegionTracker > coarse_tracker_
#define LG