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 [ray] = GenerateRay(HoriXNuDepth,VertYNuDepth,type,a,b,Ox,Oy); |
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40 | % This function generate the ray of center or corner of a patch |
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41 | |
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42 | if nargin < 3 |
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43 | type = 'center'; |
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44 | a = 0.70783777 %0.129; % horizontal physical size of image plane normalized to focal length (in meter) |
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45 | b = 0.946584169%0.085; % vertical physical size of image plane normalized to focal length (in meter) Ox = -0.010727086; % camera origin offset from the image center in horizontal direction |
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46 | Ox = 0.5; % camera origin offset from the image center in horizontal direction |
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47 | Oy = 0.5; % camera origin offset from the image center in vertical direction |
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48 | elseif nargin < 4 |
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49 | a = 0.70783777 %0.129; % horizontal physical size of image plane normalized to focal length (in meter) |
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50 | b = 0.946584169%0.085; % vertical physical size of image plane normalized to focal length (in meter) Ox = -0.010727086; % camera origin offset from the image center in horizontal direction |
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51 | Ox = 0.5; % camera origin offset from the image center in horizontal direction |
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52 | Oy = 0.5; % camera origin offset from the image center in vertical direction |
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53 | elseif nargin < 5 |
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54 | b = a; |
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55 | Ox = 0.5; % camera origin offset from the image center in horizontal direction |
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56 | Oy = 0.5; % camera origin offset from the image center in vertical direction |
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57 | elseif nargin <6 |
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58 | Ox = 0.5; % camera origin offset from the image center in horizontal direction |
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59 | Oy = 0.5; % camera origin offset from the image center in vertical direction |
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60 | elseif nargin <7 |
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61 | Oy = Ox; |
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62 | end |
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63 | |
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64 | if type == 'center' |
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65 | im_x_position = repmat(((1:HoriXNuDepth)-0.5)/HoriXNuDepth - Ox,[VertYNuDepth 1]); |
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66 | im_y_position = repmat(((VertYNuDepth:-1:1)'-0.5)/VertYNuDepth - Oy,[1 HoriXNuDepth]); |
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67 | elseif type == 'corner' |
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68 | im_x_position = repmat((0:(HoriXNuDepth))/(HoriXNuDepth) - Ox,[VertYNuDepth+1 1]); |
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69 | im_y_position = repmat((((VertYNuDepth):-1:0)')/(VertYNuDepth) - Oy,[1 HoriXNuDepth+1]); |
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70 | end |
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71 | |
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72 | ray = cat(3,a*im_x_position, b*im_y_position, ones(size(im_y_position))); %[ VertYSize horiXSize 3] |
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73 | ray = ray./repmat(sqrt(sum(ray(:,:,1).^2+ray(:,:,2).^2+ray(:,:,3).^2,3)),[1 1 3]); |
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74 | return; |
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