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# Installing OpenCV
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## Linux with Package Manager
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### Arch Linux
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```shell
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pacman -Syu base-devel opencv
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```
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### Fedora
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```shell
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sudo dnf install opencv opencv-dev
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```
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## Linux From Source
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Required Packages:
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```shell
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sudo apt-get install build-essential cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
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```
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Optional Packages:
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```shell
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sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev
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```
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Building from Source:
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```shell
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git clone https://github.com/opencv/opencv.git
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git clone https://github.com/opencv/opencv_contrib.git
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cd opencv && mkdir build && cd build
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cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local ..
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make -j8 # runs 8 jobs in parallel
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sudo make install
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```
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## Windows
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You can download the pre-built libraries from [OpenCV releases](https://github.com/opencv/opencv/releases) and install them easily.
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