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1.: yes. and please use git clone https://github.com/Itseez/opencv (to get proper versioning)

2.: yes. put it next to your opencv folder

3.: make a "build" folder (anywhere, but preferably not in your src tree, so you can throw it away later) and cd there

4.: invoke cmake (better even: cmake-gui), and add -DOPENCV_EXTRA_MODULES_PATH=/where/you/put/the/contrib/folder/modules (or locate the option in cmake-gui). the /modules at the end is important ! the last argument to cmake should be /path/to/opencv/folder .

5.: call make -j5 (5 is the number ofthreads to be used. you may skip the option, it'll just take longer)

6.: if no errors occurred, run make install

(7.: good luck !)

1.: yes. and please use git clone https://github.com/Itseez/opencv (to get proper versioning)

2.: yes. put it next to your opencv folder

3.: make a "build" folder (anywhere, but preferably not in your src tree, so you can throw it away later) and cd there

4.: invoke cmake (better even: cmake-gui), and add -DOPENCV_EXTRA_MODULES_PATH=/where/you/put/the/contrib/folder/modules (or locate the option in cmake-gui). the /modules at the end is important ! ! -DCMAKE_INSTALL_PREFIX=/some/folder should point to the final install path (/usr/local by default), see 6. the last argument to cmake should be /path/to/opencv/folder .

5.: call make -j5 (5 is the number ofthreads to be used. you may skip the option, it'll just take longer)

6.: if no errors occurred, run make install

(7.: good luck !)