% *  This code was used in the following articles:
% *  [1] Learning 3-D Scene Structure from a Single Still Image, 
% *      Ashutosh Saxena, Min Sun, Andrew Y. Ng, 
% *      In ICCV workshop on 3D Representation for Recognition (3dRR-07), 2007.
% *      (best paper)
% *  [2] 3-D Reconstruction from Sparse Views using Monocular Vision, 
% *      Ashutosh Saxena, Min Sun, Andrew Y. Ng, 
% *      In ICCV workshop on Virtual Representations and Modeling 
% *      of Large-scale environments (VRML), 2007. 
% *  [3] 3-D Depth Reconstruction from a Single Still Image, 
% *      Ashutosh Saxena, Sung H. Chung, Andrew Y. Ng. 
% *      International Journal of Computer Vision (IJCV), Aug 2007. 
% *  [6] Learning Depth from Single Monocular Images, 
% *      Ashutosh Saxena, Sung H. Chung, Andrew Y. Ng. 
% *      In Neural Information Processing Systems (NIPS) 18, 2005.
% *
% *  These articles are available at:
% *  http://make3d.stanford.edu/publications
% * 
% *  We request that you cite the papers [1], [3] and [6] in any of
% *  your reports that uses this code. 
% *  Further, if you use the code in image3dstiching/ (multiple image version),
% *  then please cite [2].
% *  
% *  If you use the code in third_party/, then PLEASE CITE and follow the
% *  LICENSE OF THE CORRESPONDING THIRD PARTY CODE.
% *
% *  Finally, this code is for non-commercial use only.  For further 
% *  information and to obtain a copy of the license, see 
% *
% *  http://make3d.stanford.edu/publications/code
% *
% *  Also, the software distributed under the License is distributed on an 
% * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 
% *  express or implied.   See the License for the specific language governing 
% *  permissions and limitations under the License.
% *
% */
function [Point] = Point2ImageRange(Point, NormalizedEpipolarLinePara, ScaleImg)

% modify the point along the epipolarline so that 
% the Modified point is in the the image range 
% with minimal shift from the original Point


% First check Horizontal then check Vertical
if Point(2) > ScaleImg(2) % make Point(2) = ScaleImg(2)
	Point(2) = ScaleImg(2);
	Point(1) = -NormalizedEpipolarLinePara(2)/NormalizedEpipolarLinePara(1) - NormalizedEpipolarLinePara(2)/NormalizedEpipolarLinePara(1)*Point(2);
elseif Point(2) < 1
	Point(2) = 1;
	Point(1) = -NormalizedEpipolarLinePara(3)/NormalizedEpipolarLinePara(1) - NormalizedEpipolarLinePara(2)/NormalizedEpipolarLinePara(1)*Point(2);
end

if Point(1) > ScaleImg(1) % make Point(1) = ScaleImg(1)
	Point(1) = ScaleImg(1);
	Point(2) = -NormalizedEpipolarLinePara(3)/NormalizedEpipolarLinePara(2) - NormalizedEpipolarLinePara(1)/NormalizedEpipolarLinePara(2)*Point(1);
elseif Point(1) < 1
        Point(1) = 1;
	Point(2) = -NormalizedEpipolarLinePara(3)/NormalizedEpipolarLinePara(2) - NormalizedEpipolarLinePara(1)/NormalizedEpipolarLinePara(2)*Point(1);
end

if abs(NormalizedEpipolarLinePara' * [Point ; ones(1, 1)]) > 0.1 

	Point(2) = -NormalizedEpipolarLinePara(3)/NormalizedEpipolarLinePara(2) - NormalizedEpipolarLinePara(1)/NormalizedEpipolarLinePara(2)*Point(1);
end

return;