| 51 | |
| 52 | template <typename image_type> |
| 53 | void start_track ( |
| 54 | const image_type& img, |
| 55 | const drectangle& p |
| 56 | ) |
| 57 | { |
| 58 | DLIB_CASSERT(p.is_empty() == false, |
| 59 | "\t void correlation_tracker::start_track()" |
| 60 | << "\n\t You can't give an empty rectangle." |
| 61 | ); |
| 62 | |
| 63 | B.set_size(0,0); |
| 64 | |
| 65 | point_transform_affine tform = inv(make_chip(img, p, F)); |
| 66 | for (unsigned long i = 0; i < F.size(); ++i) |
| 67 | fft_inplace(F[i]); |
| 68 | make_target_location_image(tform(center(p)), G); |
| 69 | A.resize(F.size()); |
| 70 | for (unsigned long i = 0; i < F.size(); ++i) |
| 71 | { |
| 72 | A[i] = pointwise_multiply(G, F[i]); |
| 73 | B += squared(real(F[i]))+squared(imag(F[i])); |
| 74 | } |
| 75 | |
| 76 | position = p; |
| 77 | |
| 78 | // now do the scale space stuff |
| 79 | make_scale_space(img, Fs); |
| 80 | for (unsigned long i = 0; i < Fs.size(); ++i) |
| 81 | fft_inplace(Fs[i]); |
| 82 | make_scale_target_location_image(get_num_scale_levels()/2, Gs); |
| 83 | Bs.set_size(0); |
| 84 | As.resize(Fs.size()); |
| 85 | for (unsigned long i = 0; i < Fs.size(); ++i) |
| 86 | { |
| 87 | As[i] = pointwise_multiply(Gs, Fs[i]); |
| 88 | Bs += squared(real(Fs[i]))+squared(imag(Fs[i])); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | |
| 93 | unsigned long get_filter_size ( |