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Updated Reconstruction from Video (markdown)

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Dakota Benjamin 2018-02-02 09:41:47 -05:00
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Reconstruction-from-Video.md

@ -31,11 +31,11 @@ cd ..
The SLAM algorithm requires the camera to be calibrated. It is difficult to extract calibration parameters from the video's metadata as we do when using still images. Thus, it is required to run a calibration procedure that will compute the calibration from a video of a checkerboard.
We will start by **recording the calibration video**. Display this [chessboard pattern](https://dl.dropboxusercontent.com/u/2801164/odm/chessboard.pdf) on a large screen, or [print it on a large paper and stick it on a flat surface](http://www.instructables.com/id/How-to-make-a-camera-calibration-pattern/). Now record a video pointing the camera to the chessboard.
We will start by **recording the calibration video**. Display this [chessboard pattern](https://github.com/OpenDroneMap/wiki-assets/raw/master/chessboard.pdf) on a large screen, or [print it on a large paper and stick it on a flat surface](http://www.instructables.com/id/How-to-make-a-camera-calibration-pattern/). Now record a video pointing the camera to the chessboard.
![chessboard shot](https://dl.dropboxusercontent.com/u/2801164/odm/chessboard_sample.jpg)
![chessboard shot](https://github.com/OpenDroneMap/wiki-assets/raw/master/chessboard_sample.jpg)
While recording move the camera to both sides and up and down always maintaining the entire pattern framed. The goal is to capture the pattern from different points of views. The resulting video should look like [this](https://dl.dropboxusercontent.com/u/2801164/odm/chessboard.mp4).
While recording move the camera to both sides and up and down always maintaining the entire pattern framed. The goal is to capture the pattern from different points of views. The resulting video should look like [this](https://github.com/OpenDroneMap/wiki-assets/raw/master/chessboard.mp4).
Now you can **run the calibration script** as follows
```
@ -74,4 +74,4 @@ When done, the textured model will be in `PROJECT_PATH/PROJECT_NAME/odm_texturin
For [this video](https://dl.dropboxusercontent.com/u/2801164/odm/castle_video.mp4) you should get something similar to
![castle result](https://dl.dropboxusercontent.com/u/2801164/odm/castle_result.jpg)
![castle result](https://github.com/OpenDroneMap/wiki-assets/raw/master/castle_result.jpg)