Optical Flow with OpenCV - Revision history

Joachim: /* Execute Examples */

2021-05-11T07:48:41Z

Execute Examples

← Older revision		Revision as of 07:48, 11 May 2021
Line 54:		Line 54:
	== Execute Examples ==		== Execute Examples ==

	Just paste the example commands from the git repo readme, e.g.:		Just paste the example commands from the git repo readme, (any mp4 worked) e.g.:

	python3 demo.py --algorithm lucaskanade --video_path videos/car.mp4		python3 demo.py --algorithm lucaskanade --video_path videos/car.mp4

Joachim: /* C++ */

2021-05-10T16:53:33Z

C++

← Older revision		Revision as of 16:53, 10 May 2021
Line 29:		Line 29:
	To get rid of this, use a self compiled version of opencv with contrib part.		To get rid of this, use a self compiled version of opencv with contrib part.
	It needs up to 2GB RAM per (c)make core, so I limited it to 4 cores.		It needs up to 2GB RAM per (c)make core, so I limited it to 4 cores.
	It chokes if it finds a python2, so I ~~had~~ to ~~temporarily rename python2 stuff~~		It chokes if it finds a python2, so I need to disable it

	~~for f in /usr/lib64/no-libpython2~~.7.~~so /usr/lib64/no-python2~~.~~7 /usr/bin/no-python2 /usr/bin/no-python2.7 /usr/bin/no-python2-config /usr/bin/no-python2.7-config~~		Install prerequisites (some are optional...)
	do
	~~g=${f/no-/}; sudo mv $g $f~~
	~~done~~

	~~Install prerequisites~~		sudo zypper in gtk3-devel ffmpeg-3-libavcodec-devel ffmpeg-3-libavformat-devel ffmpeg-3-libavutil-devel ffmpeg-3-libswscale-devel ffmpeg-3-libavresample-devel libva-devel tesseract-ocr-devel vtk-devel

	sudo zypper in gtk3-devel ffmpeg-3-libavcodec-devel ffmpeg-3-libavformat-devel ffmpeg-3-libavutil-devel ffmpeg-3-libswscale-devel ffmpeg-3-libavresample-devel

	Build and Install OpenCV		Build and Install OpenCV
Line 47:		Line 42:
	unzip opencv_contrib.zip		unzip opencv_contrib.zip
	mkdir -p build && cd build		mkdir -p build && cd build
	cmake -DPYTHON3_EXECUTABLE=/home/joachim/miniconda3/envs/Optical-Flow-in-OpenCV/bin/python -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-master/modules ../opencv-master		cmake -DBUILD_opencv_python2=OFF -DPYTHON3_EXECUTABLE=/home/joachim/miniconda3/envs/Optical-Flow-in-OpenCV/bin/python -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-master/modules ../opencv-master
	cmake --build . --parallel 4		cmake --build . --parallel 4
	make install		make install

	~~Restore python2 stuff~~

	~~for f in /usr/lib64/no-libpython2.7.so /usr/lib64/no-python2.7 /usr/bin/no-python2 /usr/bin/no-python2.7 /usr/bin/no-python2-config /usr/bin/no-python2.7-config~~
	do
	~~g=${f/no-/}; sudo mv $f $g~~
	~~done~~

	Now compile the sample code		Now compile the sample code

Joachim: /* C++ */

2021-05-10T13:29:33Z

C++

← Older revision		Revision as of 13:29, 10 May 2021
Line 38:		Line 38:
	Install prerequisites		Install prerequisites

	zypper in gtk3-devel ffmpeg-3-libavcodec-devel ffmpeg-3-libavformat-devel ffmpeg-3-libavutil-devel ffmpeg-3-libswscale-devel ffmpeg-3-libavresample-devel		sudo zypper in gtk3-devel ffmpeg-3-libavcodec-devel ffmpeg-3-libavformat-devel ffmpeg-3-libavutil-devel ffmpeg-3-libswscale-devel ffmpeg-3-libavresample-devel

	Build and Install OpenCV		Build and Install OpenCV

Joachim: /* Install */

2021-05-10T12:12:16Z

Install

← Older revision		Revision as of 12:12, 10 May 2021
Line 10:		Line 10:

	== Install ==		== Install ==

			=== Python 3 ===

	To test python examples from the git repo directory learnopencv/Optical-Flow-in-OpenCV in a conda environment is easy		To test python examples from the git repo directory learnopencv/Optical-Flow-in-OpenCV in a conda environment is easy
Line 18:		Line 20:
	conda activate optical-flow		conda activate optical-flow
	pip install -r reqirements.txt		pip install -r reqirements.txt

			=== C++ ===

	To run the c++ examples is a bit more involved. The Opensuse packages of opencv do not include all prerequisites and you get an error:		To run the c++ examples is a bit more involved. The Opensuse packages of opencv do not include all prerequisites and you get an error:
Line 31:		Line 35:
	g=${f/no-/}; sudo mv $g $f		g=${f/no-/}; sudo mv $g $f
	done		done

			Install prerequisites

			zypper in gtk3-devel ffmpeg-3-libavcodec-devel ffmpeg-3-libavformat-devel ffmpeg-3-libavutil-devel ffmpeg-3-libswscale-devel ffmpeg-3-libavresample-devel

			Build and Install OpenCV

	wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip		wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip

Joachim: /* Install */

2021-05-10T11:31:39Z

Install

← Older revision		Revision as of 11:31, 10 May 2021
Line 51:		Line 51:

	cd algorithms		cd algorithms
	cmake . ~~--parallel 4~~		cmake .
	make -j4		make -j4

Joachim: /* Install */

2021-05-10T11:30:45Z

Install

← Older revision		Revision as of 11:30, 10 May 2021
Line 23:		Line 23:
	fatal error: opencv2/optflow.hpp: No such file or directory		fatal error: opencv2/optflow.hpp: No such file or directory

	To get rid of this, use a self compiled version of opencv with contrib part (needs up to 2GB RAM per (c)make core)		To get rid of this, use a self compiled version of opencv with contrib part.
			It needs up to 2GB RAM per (c)make core, so I limited it to 4 cores.
			It chokes if it finds a python2, so I had to temporarily rename python2 stuff

			for f in /usr/lib64/no-libpython2.7.so /usr/lib64/no-python2.7 /usr/bin/no-python2 /usr/bin/no-python2.7 /usr/bin/no-python2-config /usr/bin/no-python2.7-config
			do
			g=${f/no-/}; sudo mv $g $f
			done

	wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip		wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip
Line 33:		Line 40:
	cmake --build . --parallel 4		cmake --build . --parallel 4
	make install		make install

			Restore python2 stuff

			for f in /usr/lib64/no-libpython2.7.so /usr/lib64/no-python2.7 /usr/bin/no-python2 /usr/bin/no-python2.7 /usr/bin/no-python2-config /usr/bin/no-python2.7-config
			do
			g=${f/no-/}; sudo mv $f $g
			done

	Now compile the sample code		Now compile the sample code

Joachim: /* Install */

2021-05-10T10:21:36Z

Install

← Older revision		Revision as of 10:21, 10 May 2021
Line 39:		Line 39:
	cmake . --parallel 4		cmake . --parallel 4
	make -j4		make -j4

	~~And finally execute it~~

	~~./OpticalFlow ../videos/car.mp4 lucaskanade~~

	== Execute Examples ==		== Execute Examples ==

Joachim: /* Install */

2021-05-10T10:19:48Z

Install

← Older revision		Revision as of 10:19, 10 May 2021
Line 23:		Line 23:
	fatal error: opencv2/optflow.hpp: No such file or directory		fatal error: opencv2/optflow.hpp: No such file or directory

	To get rid of this, use a self compiled version of opencv with contrib part		To get rid of this, use a self compiled version of opencv with contrib part (needs up to 2GB RAM per (c)make core)

	wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip		wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip
Line 31:		Line 31:
	mkdir -p build && cd build		mkdir -p build && cd build
	cmake -DPYTHON3_EXECUTABLE=/home/joachim/miniconda3/envs/Optical-Flow-in-OpenCV/bin/python -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-master/modules ../opencv-master		cmake -DPYTHON3_EXECUTABLE=/home/joachim/miniconda3/envs/Optical-Flow-in-OpenCV/bin/python -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-master/modules ../opencv-master
	cmake --build . --parallel		cmake --build . --parallel 4
			make install

			Now compile the sample code

			cd algorithms
			cmake . --parallel 4
			make -j4

			And finally execute it

			./OpticalFlow ../videos/car.mp4 lucaskanade

	== Execute Examples ==		== Execute Examples ==

Joachim: /* Install */

2021-05-10T10:13:45Z

Install

← Older revision		Revision as of 10:13, 10 May 2021
Line 15:		Line 15:
	git clone https://github.com/spmallick/learnopencv.git		git clone https://github.com/spmallick/learnopencv.git
	cd learnopencv/Optical-Flow-in-OpenCV/		cd learnopencv/Optical-Flow-in-OpenCV/
	conda create -n optical-flow		conda create -n optical-flow python=3.8
	conda activate optical-flow		conda activate optical-flow
	pip install -r reqirements.txt		pip install -r reqirements.txt
Line 30:		Line 30:
	unzip opencv_contrib.zip		unzip opencv_contrib.zip
	mkdir -p build && cd build		mkdir -p build && cd build
	cmake -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-master/modules ../opencv-master		cmake -DPYTHON3_EXECUTABLE=/home/joachim/miniconda3/envs/Optical-Flow-in-OpenCV/bin/python -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-master/modules ../opencv-master
	~~CMAKE_BUILD_PARALLEL_LEVEL=8~~ cmake --build .		cmake --build . --parallel

	== Execute Examples ==		== Execute Examples ==

Joachim: /* Optical Flow */

2021-05-09T14:43:46Z

Optical Flow

@@ Line 1: / Line 1: @@
 = Optical Flow =
 == Resources ==
@@ Line 32: / Line 34: @@
 == Execute Examples ==