1 | % * This code was used in the following articles:
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2 | % * [1] Learning 3-D Scene Structure from a Single Still Image,
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3 | % * Ashutosh Saxena, Min Sun, Andrew Y. Ng,
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4 | % * In ICCV workshop on 3D Representation for Recognition (3dRR-07), 2007.
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5 | % * (best paper)
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6 | % * [2] 3-D Reconstruction from Sparse Views using Monocular Vision,
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7 | % * Ashutosh Saxena, Min Sun, Andrew Y. Ng,
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8 | % * In ICCV workshop on Virtual Representations and Modeling
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9 | % * of Large-scale environments (VRML), 2007.
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10 | % * [3] 3-D Depth Reconstruction from a Single Still Image,
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11 | % * Ashutosh Saxena, Sung H. Chung, Andrew Y. Ng.
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12 | % * International Journal of Computer Vision (IJCV), Aug 2007.
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13 | % * [6] Learning Depth from Single Monocular Images,
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14 | % * Ashutosh Saxena, Sung H. Chung, Andrew Y. Ng.
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15 | % * In Neural Information Processing Systems (NIPS) 18, 2005.
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16 | % *
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17 | % * These articles are available at:
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18 | % * http://make3d.stanford.edu/publications
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19 | % *
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20 | % * We request that you cite the papers [1], [3] and [6] in any of
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21 | % * your reports that uses this code.
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22 | % * Further, if you use the code in image3dstiching/ (multiple image version),
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23 | % * then please cite [2].
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24 | % *
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25 | % * If you use the code in third_party/, then PLEASE CITE and follow the
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26 | % * LICENSE OF THE CORRESPONDING THIRD PARTY CODE.
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27 | % *
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28 | % * Finally, this code is for non-commercial use only. For further
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29 | % * information and to obtain a copy of the license, see
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30 | % *
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31 | % * http://make3d.stanford.edu/publications/code
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32 | % *
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33 | % * Also, the software distributed under the License is distributed on an
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34 | % * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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35 | % * express or implied. See the License for the specific language governing
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36 | % * permissions and limitations under the License.
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37 | % *
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38 | % */
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39 | function [matches fail] = MatchPointsGivenOcclusion( defaultPara, ImgInfo1, ImgInfo2, ImgScale1, ImgScale2, Img1, Img2, Img1Index, Img2Index, ... |
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40 | Pair, GlobalScale, Wrlname, PostFixStrAfter,... |
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41 | POriReprojM1, FieldOccluPix1, FaceSetPickedIND1, ... |
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42 | POriReprojM2, FieldOccluPix2, FaceSetPickedIND2, FlagEarlyStopMatchPointsGivenOcclusion) |
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43 | % initialize parameters |
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44 | displayFlag = 0; |
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45 | fail = 0; |
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46 | RefineCorrSpace = 10; |
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47 | depthratioMin = 0.01; |
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48 | depthratioMax = 100; |
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49 | |
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50 | if nargin < 20 |
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51 | FlagEarlyStopMatchPointsGivenOcclusion = 0; |
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52 | end |
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53 | % 1)Prepare the Constrain to run the matching |
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54 | |
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55 | % load surf Features |
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56 | [f1] = readSurf(Img1, defaultPara.Fdir, 'Dense'); % original features |
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57 | [f2] = readSurf(Img2, defaultPara.Fdir, 'Dense'); % original features |
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58 | |
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59 | % initialize the Rc ConS ConSRough |
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60 | NumSurF1 = length(f1); |
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61 | NumSurF2 = length(f2); |
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62 | Rc1 = [ ones(1,NumSurF1); zeros(1,NumSurF1); ones(1,NumSurF1); zeros(1,NumSurF1)]; |
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63 | Rc2 = [ ones(1,NumSurF2); zeros(1,NumSurF2); ones(1,NumSurF2); zeros(1,NumSurF2)]; |
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64 | ConS1 = zeros(4,NumSurF1); |
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65 | ConS2 = zeros(4,NumSurF2); |
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66 | ConSRough1 = ConS1; |
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67 | ConSRough2 = ConS2; |
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68 | ConS1_4points = zeros(8,NumSurF1); |
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69 | ConS2_4points = zeros(8,NumSurF2); |
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70 | AllPOriReprojM1 = zeros(2,NumSurF1); |
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71 | AllPOriReprojM2 = zeros(2,NumSurF2); |
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72 | AllFieldOccluPix1 = zeros(2,NumSurF1); |
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73 | AllFieldOccluPix2 = zeros(2,NumSurF2); |
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74 | |
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75 | % calculate constrain for effective points |
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76 | if ~isempty(FaceSetPickedIND1) |
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77 | [ Rc1(:,FaceSetPickedIND1) ConS1(:,FaceSetPickedIND1) ConSRough1(:,FaceSetPickedIND1) ConS1_4points(:,FaceSetPickedIND1)] = ... |
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78 | EndPoint2BoxConS(defaultPara, ImgScale1(1), ImgScale1(2), POriReprojM1, FieldOccluPix1, 1); |
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79 | AllPOriReprojM1(:,FaceSetPickedIND1) = POriReprojM1; |
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80 | AllFieldOccluPix1(:,FaceSetPickedIND1) = FieldOccluPix1; |
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81 | end |
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82 | if ~isempty(FaceSetPickedIND2) |
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83 | [ Rc2(:,FaceSetPickedIND2) ConS2(:,FaceSetPickedIND2) ConSRough2(:,FaceSetPickedIND2) ConS2_4points(:,FaceSetPickedIND2)] = ... |
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84 | EndPoint2BoxConS(defaultPara, ImgScale2(1), ImgScale2(2), POriReprojM2, FieldOccluPix2, 1); |
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85 | AllPOriReprojM2(:,FaceSetPickedIND2) = POriReprojM2; |
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86 | AllFieldOccluPix2(:,FaceSetPickedIND2) = FieldOccluPix2; |
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87 | end |
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88 | |
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89 | T1_hat = [[0 -Pair.T(3) Pair.T(2)];... |
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90 | [Pair.T(3) 0 -Pair.T(1)];... |
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91 | [-Pair.T(2) Pair.T(1) 0]]; |
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92 | F = inv(defaultPara.InrinsicK2)'*T1_hat*Pair.R*inv(defaultPara.InrinsicK1); |
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93 | I1=imreadbw([defaultPara.Fdir '/pgm/' Img1 '.pgm']); % function from sift |
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94 | I2=imreadbw([defaultPara.Fdir '/pgm/' Img2 '.pgm']); % function from sift |
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95 | if displayFlag |
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96 | |
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97 | figure; |
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98 | dispMatchSearchRegin(I1, I2, [f1; ones(1,NumSurF1)], [f2; ones(1,NumSurF2)], ConS1_4points, ConS2_4points, F, ... |
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99 | AllPOriReprojM1, ones(1,NumSurF1), AllFieldOccluPix1, ones(1,NumSurF1), ... |
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100 | AllPOriReprojM2, ones(1,NumSurF2), AllFieldOccluPix2, ones(1,NumSurF2), ... |
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101 | 1, 'Stacking', 'h', 'Interactive', 0); |
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102 | end |
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103 | |
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104 | if ~( isempty(FaceSetPickedIND1)&&isempty(FaceSetPickedIND2)) % only if not both FaceSetPickedIND is empty then find the matches |
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105 | % write the constrain into data |
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106 | Vector2Ipoint([Rc1; ConS1],[defaultPara.Fdir '/surf/'],['RConS_' Img1]); |
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107 | Vector2Ipoint([Rc2; ConS2],[defaultPara.Fdir '/surf/'],['RConS_' Img2]); |
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108 | Vector2Ipoint([ConSRough1],[defaultPara.Fdir '/surf/'],['RConSRough_' Img1]); |
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109 | Vector2Ipoint([ConSRough2],[defaultPara.Fdir '/surf/'],['RConSRough_' Img2]); |
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110 | |
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111 | %======================= debug only |
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112 | % save([defaultPara.Fdir '/data/PreOcclusionDetect.mat'],'Rc1','ConS1','Rc2','ConS2','ConSRough1','ConSRough2'); |
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113 | % return; |
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114 | %================================== |
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115 | |
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116 | % run time consuming matching code |
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117 | tic; |
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118 | cd match |
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119 | system(['./surfOccluMatch.sh ' defaultPara.Fdir ' ' Img1 ' ' Img2 ' OccluDense ' '0.2 0.6']); % Parameter still need to be changed//Min |
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120 | cd .. |
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121 | toc |
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122 | |
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123 | % Readin matching result |
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124 | [f1, f2, matches] = readSurfMatches(Img1, Img2, defaultPara.Fdir, [ defaultPara.Type 'OccluDense'], 1, 1, 3); |
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125 | % in 'OccluDense' cases matches is N by 3, the last column is Ratio |
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126 | if isempty( matches) |
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127 | disp( 'Zeros Surf Occlusion Matches'); |
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128 | fail = 1; |
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129 | return; |
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130 | end |
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131 | matches = matches(1:2,:); |
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132 | |
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133 | else |
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134 | % no matches, means no need to storage new ConstrainOccluMatch |
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135 | matches = []; |
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136 | end |
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137 | |
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138 | if displayFlag |
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139 | figure(200); plotmatches(I1,I2,f1, f2,matches, 'Stacking','v','Interactive', 3); |
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140 | saveas(200,[ defaultPara.ScratchFolder Img1 '_' Img2 '_OccluMatches'],'jpg'); |
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141 | end |
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142 | |
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143 | if FlagEarlyStopMatchPointsGivenOcclusion |
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144 | matches = [f1(:,matches(1,:)); f2(:,matches(2,:))]; |
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145 | save([defaultPara.Fdir '/data/' Img1 '_' Img2 '_' PostFixStrAfter '.mat'],'f1','f2','matches'); |
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146 | return; |
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147 | end |
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148 | |
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149 | % 2) Process the matches |
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150 | |
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151 | % Pruning by epipolarline |
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152 | if ~isempty(matches) |
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153 | [inlier Residual] = EpipoPrune(defaultPara, Pair, [f1(:,matches(1,:)); f2(:,matches(2,:))], (ImgScale1+ImgScale2)/2); |
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154 | matches = matches(:,inlier); |
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155 | |
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156 | if defaultPara.Flag.FlagCorrRefinement |
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157 | % Fineer Search of the close by the SurfMatches Features by Corrolation Matches ========Min Added July 13th |
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158 | if ~isempty(Pair.lamda) |
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159 | depthratio = Pair.lamda(1,:)./Pair.lamda(2,:); |
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160 | % Min add to remove outliers (should be already removed when doing PoseEst.m) |
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161 | Inliers = depthratio > depthratioMin & depthratio < depthratioMax; |
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162 | depthratio = depthratio(Inliers); |
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163 | maxRatio = max(depthratio); |
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164 | minRatio = min(depthratio); |
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165 | else |
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166 | maxRatio = max([GlobalScale(1)/GlobalScale(2) GlobalScale(2)/GlobalScale(1)]); |
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167 | minRatio = 1/maxRatio; |
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168 | end |
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169 | |
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170 | % construction epipolar line unit vector |
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171 | EpipolarUnitVector1 = F*[ f1(:,matches(1,:)); ones(1,size(matches,2))]; |
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172 | EpipolarUnitVector2 = F'*[ f2(:,matches(2,:)); ones(1,size(matches,2))]; |
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173 | EpipolarUnitVector1 = EpipolarUnitVector1([2 1],:); |
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174 | EpipolarUnitVector2 = EpipolarUnitVector2([2 1],:); |
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175 | EpipolarUnitVector1 = EpipolarUnitVector1./repmat( sqrt( sum( EpipolarUnitVector1.^2, 1)), 2, 1); |
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176 | EpipolarUnitVector2 = EpipolarUnitVector2./repmat( sqrt( sum( EpipolarUnitVector2.^2, 1)), 2, 1); |
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177 | |
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178 | [Matches1 CoeffM1 Inliers1]=CorrolationMatch( defaultPara, Pair, I1, I2, f1(:,matches(1,:)), ... |
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179 | f2(:,matches(2,:)) + EpipolarUnitVector1*RefineCorrSpace, ... |
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180 | f2(:,matches(2,:)) - EpipolarUnitVector1*RefineCorrSpace, [minRatio maxRatio],[1 2]); |
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181 | Pair2_1.R = Pair.R'; |
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182 | Pair2_1.T = -Pair.R*Pair.T; |
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183 | [Matches2 CoeffM2 Inliers2]=CorrolationMatch( defaultPara, Pair2_1, I2, I1, f2(:,matches(2,:)), ... |
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184 | f1(:,matches(1,:)) + EpipolarUnitVector2*RefineCorrSpace, ... |
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185 | f1(:,matches(1,:)) - EpipolarUnitVector2*RefineCorrSpace, [minRatio maxRatio],[1 2]); |
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186 | Matches1 = Matches1(:,Inliers1); |
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187 | Matches2 = Matches2(:,Inliers2); |
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188 | CoeffM1 = CoeffM1(Inliers1); |
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189 | CoeffM2 = CoeffM2(Inliers2); |
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190 | |
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191 | % Check if the Matches are not mutual discard the one with less Coeff(Cross-Corrolation value) =============== |
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192 | Matches = [ Matches1 [Matches2(3:4,:); Matches2(1:2,:)]]; |
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193 | CoeffM = [ CoeffM1 CoeffM2]; |
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194 | % Min used different algorithm than SurFeature Matches |
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195 | [Inliers] = CleanMatch(Matches, CoeffM); % choose the matches with higher Coeff is the matches is not mutual |
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196 | Matches = Matches(:,Inliers); |
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197 | CoeffM = CoeffM(:,Inliers); |
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198 | if defaultPara.Flag.FlagRefinementDisp |
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199 | figure; plotmatches(I1,I2,Matches(1:2,:), Matches(3:4,:),repmat(1:size(Matches,2),2,1), 'Stacking','v','Interactive', 3); |
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200 | end |
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201 | |
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202 | % use Coeff as threshould to filter out error matches |
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203 | Mask = CoeffM > defaultPara.CoeffMThre; |
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204 | [inlier, Residual] = EpipoPrune(defaultPara, Pair, Matches, ImgScale1); |
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205 | Mark = Mask & Residual < defaultPara.ResidualThre; |
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206 | f1 = Matches(1:2,Mark); |
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207 | f2 = Matches(3:4,Mark); |
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208 | matches = repmat( 1:sum(Mark),2,1); |
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209 | end |
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210 | % ====================================================================================== |
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211 | |
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212 | if displayFlag |
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213 | figure(201); plotmatches(I1,I2,f1, f2,matches, 'Stacking','v','Interactive', 3); |
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214 | saveas(201,[ defaultPara.ScratchFolder Img1 '_' Img2 '_OccluMatchesPrune'],'jpg'); |
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215 | end |
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216 | end |
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217 | |
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218 | % Triangulation |
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219 | if ~isempty(matches) |
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220 | tempf1 = f1(:,matches(1,:)); |
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221 | tempf2 = f2(:,matches(2,:)); |
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222 | x_calib = [ inv(defaultPara.InrinsicK1)*[ tempf1; ones(1,size(tempf1,2))];... |
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223 | inv(defaultPara.InrinsicK2)*[ tempf2; ones(1,size(tempf2,2))]]; |
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224 | [ lamda1 lamda2 Error] = triangulation( defaultPara, Pair.R, Pair.T, x_calib); |
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225 | % notice lamda re-scale to local model scale |
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226 | lamda1 = lamda1./GlobalScale(1); |
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227 | lamda2 = lamda2./GlobalScale(2); |
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228 | % Storage the match result for later ReInference |
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229 | AddMatch2Model(defaultPara, Wrlname, lamda1, f1(:,matches(1,:)), ImgInfo1, ImgScale1, Img1Index, Img2Index, PostFixStrAfter, Error); |
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230 | AddMatch2Model(defaultPara, Wrlname, lamda2, f2(:,matches(2,:)), ImgInfo2, ImgScale2, Img2Index, Img1Index, PostFixStrAfter, Error); |
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231 | end |
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232 | |
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233 | % Storage the New Matches |
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234 | if defaultPara.Flag.FlagRefinementDisp |
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235 | disp('Storaging Occlusion Surf Features Matches'); |
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236 | end |
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237 | |
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238 | save([defaultPara.Fdir '/data/' Img1 '_' Img2 '_' PostFixStrAfter '.mat'],'f1','f2','matches', 'fail'); |
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239 | |
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240 | return; |
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