Augmented reality card based application with Python, numpy and OpenCV
- Place the image of the surface to be tracked inside the
referencefolder. - On line 36 of
src/ar_main.pyreplace'model.jpg'with the name of the image you just copied inside thereferencefolder. - On line 40 of
src/ar_main.pyreplace'fox.obj'with the name of the model you want to render. To change the size of the rendered model change the scale parameter (number3) in line 103 ofsrc/ar_main.pyby a suitable number. This might require some trial and error. - Open a terminal session inside the project folder and run
python src/ar_main.py
--rectangle,-r: Draws the projection of the reference surface on the video frame as a blue rectangle.--matches,-m: Draws matches between reference surface and video frame.
If you get the message:
Unable to capture video
printed to your terminal, the most likely cause is that your OpenCV installation has been compiled without FFMPEG support. Pre-built OpenCV packages such as the ones downloaded via pip are not compiled with FFMPEG support, which means that you have to build it manually.
If you get the error:
Traceback (most recent call last):
File "src/ar_main.py", line 174, in
main()
File "src/ar_main.py", line 40, in main
obj = OBJ(os.path.join(dir_name, 'models/fox.obj'), swapyz=True)
File "[...]/augmented-reality/src/objloader_simple.py", line 16, in init
v = v[0], v[2], v[1]
TypeError: 'map' object is not subscriptable
The most likely cause is that you are trying to execute the code with Python 3 and the code is written in Python 2. The map function in Python 3 returns an iterable object of type map, and not a subscriptible list. To fix it, change the calls to map() by list(map()) on lines 14, 19 and 24 of src/objloader_simple.py.
See this blog entries for an in-depth explanation of the logic behind the code: