[37] | 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 | T = .2*ones(11); % make light gray plus on dark gray background |
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| 40 | T(6,3:9) = .6; |
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| 41 | T(3:9,6) = .6; |
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| 42 | BW = T>0.5; % make white plus on black background |
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| 43 | imshow(BW), title('Binary') |
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| 44 | figure, imshow(T), title('Template') |
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| 45 | |
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| 46 | % make new image that offsets template T |
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| 47 | T_offset = .2*ones(21); |
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| 48 | offset = [3 5]; % shift by 3 rows, 5 columns |
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| 49 | T_offset( (1:size(T,1))+offset(1), (1:size(T,2))+offset(2) ) = T; |
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| 50 | imshow(T_offset), title('Offset Template') |
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| 51 | |
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| 52 | % cross-correlate BW and T_offset to recover offset |
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| 53 | cc = normxcorr2(BW,T_offset); |
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| 54 | [max_cc, imax] = max(abs(cc(:))); |
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| 55 | [ypeak, xpeak] = ind2sub(size(cc),imax(1)); |
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| 56 | corr_offset = [ (ypeak-size(T,1)) (xpeak-size(T,2)) ]; |
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| 57 | isequal(corr_offset,offset) % 1 means offset was recovered |
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