Rockpi4/dev/install-opencv - Revision history

Rust: /* Dependencies */

2022-07-18T07:27:59Z

‎Dependencies

Rust: /* Build */

2022-07-18T07:26:44Z

‎Build

Rust: /* Build */

2022-07-18T07:21:22Z

‎Build

Rust: /* Compile OpenCV */

2022-07-18T07:19:59Z

‎Compile OpenCV

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Stephen: /* Step 1: Get Ubuntu running on ROCK Pi 4 */

2019-01-08T11:57:58Z

‎Step 1: Get Ubuntu running on ROCK Pi 4

Hipboi: /* Steps Of Install OpenCV */

2019-01-08T06:52:41Z

‎Steps Of Install OpenCV

Stephen: /* Step 1: Get Ubuntu running on ROCK Pi 4 */

2019-01-07T12:50:15Z

‎Step 1: Get Ubuntu running on ROCK Pi 4

Stephen: Created page with "{{rockpi4_header}} {{Languages|rockpi4/dev/install-opencv}} ROCK Pi 4 > Development > Install OpenCV This..."

2019-01-07T12:43:13Z

Created page with "{{rockpi4_header}} {{Languages|rockpi4/dev/install-opencv}} ROCK Pi 4 > Development > Install OpenCV This..."

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{{rockpi4_header}}
{{Languages|rockpi4/dev/install-opencv}}
[[rockpi4 | ROCK Pi 4]] > [[rockpi4/dev | Development]] > [[rockpi4/dev/install-opencv | Install OpenCV]]

This a guide to install OpenCV on your ROCK Pi 4 that running Ubuntu. All the instructions are done in terminal.

== Steps Of Install OpenCV ==

=== Step 1: Get Ubuntu running on ROCK Pi 4 ===

To use OpenCV, a OS desktop is necessary. If your ROCK Pi 4 is running Ubuntu but without desktop, you can install Ubuntu mate desktop.

sudo apt install ubuntu-mate-core && sudo apt install ubuntu-mate-desktop

=== Step 2: Install all the recommended packages ===

* Compilers:

$ sudo apt-get install build-essential

* Required:

$ sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev

* Recommended optional packages

$ sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libdc1394-22-dev
$ sudo apt install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libavresample-dev
$ sudo apt install tesseract-ocr cmake-data liblept5

=== Step 3: Download OpenCV source ===

We suggest that you are at the home folder, so that you don't have to change the code in the next steps.

We need to download OpenCV source. OpenCV latest release: [[https://opencv.org/releases.html here]]. As of writing this, the latest release is 4.0.1. For the newer version, just replace the link for the source code zip file.

$ cd ~
$ wget -O opencv.zip https://github.com/opencv/opencv/archive/4.0.1.zip
$ unzip opencv.zip

And we also need to install the contribution packages of OpenCV. Here we get the latest release version:

$ cd ~
$ wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/4.0.1.zip
$ unzip opencv_contrib.zip

=== Step 4: Configuring and compiling ===

Confifure thte build using cmake:

$ cd ~/opencv-4.0.1/
$ mkdir build
$ cd build
$ export PY_NAME=$(python -c 'from sys import version_info as v; print("python%d.%d" % v[:2])')
$ export PY_NUMPY_DIR=$(python -c 'import os.path, numpy.core; print(os.path.dirname(numpy.core.__file__))')
$ cmake -DCMAKE_BUILD_TYPE=RELEASE \
-DCMAKE_INSTALL_PREFIX=/usr/local \
\
-DPYTHON2_EXECUTABLE=$(which python) \
-DPYTHON_INCLUDE_DIR=/usr/include/$PY_NAME \
-DPYTHON_INCLUDE_DIR2=/usr/include/aarch64-linux-gnu/$PY_NAME \
-DPYTHON_LIBRARY=/usr/lib/aarch64-linux-gnu/lib$PY_NAME.so \
-DPYTHON2_NUMPY_INCLUDE_DIRS=/usr/lib/$PY_NAME/dist-packages/numpy/core/include/ \
\
-DBUILD_DOCS=OFF \
-DBUILD_EXAMPLES=OFF \
-DBUILD_TESTS=OFF \
-DBUILD_PERF_TESTS=OFF \
\
-DOPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-4.0.1/modules \
..

Compile OpenCV in the build folder:

$ make -j$(nproc --all)

Install OpenCV in the build folder:

$ sudo make install
$ sudo ldconfig

=== Step 5: Test your building and installation ===

To confirm that you have install ed OpenCV correctly , try this:

rock@linux:~$ python
Python 2.7.15rc1 (default, Nov 12 2018, 14:31:15)
[GCC 7.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> cv2.__version__
'4.0.1'
>>>

=== Step6: Do the sample supported by OpenCV official ===

$ cd ~/opencv-4.0.1/samples/python
$ python watershed.py

Finally, if you don't need the files in opencv-4.0.1 or opencv_contrib-4.0.1. You can remove them:

$ cd ~
$ rm -rf opencv-4.0.1 opencv_contrib-4.0.1 opencv_contrib.zip opencv.zip

If you follow the code exactly, you will find it working just fine.

== Troubleshooting ==

* Post your issue at the forum: https://forum.radxa.com/c/dev

@@ Line 134: / Line 134: @@
 Download `OpenBLAS` (Basic Linear Algebra Subprograms)
-[http://www.openblas.net/ OpenBLAS : An optimized BLAS library]()
+[http://www.openblas.net/ OpenBLAS : An optimized BLAS library]
      # tar && cd project dir

@@ Line 155: / Line 155: @@
      cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_PREFIX=/opt/opencv -DWITH_OPENGL=ON -DOPENCV_ENABLE_NONFREE=ON -DWITH_QT=ON -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DOPENCV_GENERATE_PKGCONFIG=ON  -DWITH_1394=OFF -DBUILD_opencv_python2=OFF -DBUILD_opencv_python3=ON -DPYTHON3_LIBRARY=$(python3 -c "from distutils.sysconfig import get_config_var;from os.path import dirname,join ; print(join(dirname(get_config_var('LIBPC')),get_config_var('LDLIBRARY')))") -DPYTHON3_NUMPY_INCLUDE_DIRS=$(python3 -c "import numpy; print(numpy.get_include())") -DPYTHON3_PACKAGES_PATH=$(python3 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")
-* `WITH_OPENGL`=ON : enables OpenGL hardware acceleration surpport
+* ''WITH_OPENGL''=ON : enables OpenGL hardware acceleration surpport
-* `CMAKE_BUILD_TYPE`=Release : or Debug if you want
+* ''CMAKE_BUILD_TYPE''=Release : or Debug if you want
-* `CMAKE_VERBOSE_MAKEFILE`=ON : easy to find errors
+* ''CMAKE_VERBOSE_MAKEFILE''=ON : easy to find errors
-* `OPENCV_ENABLE_NONFREE`=ON : Some algorithms included in the library are known to be protected by patents and are disabled by default
+* ''OPENCV_ENABLE_NONFREE''=ON : Some algorithms included in the library are known to be protected by patents and are disabled by default
-* `CMAKE_INSTALL_PREFIX`=/opt/opencv： To install produced binaries root location
+* ''CMAKE_INSTALL_PREFIX''=/opt/opencv： To install produced binaries root location
-* `WITH_QT`=ON : use Qt to draw a window
+* ''WITH_QT''=ON : use Qt to draw a window
-* `BUILD_TESTS`=OFF，`BUILD_PERF_TESTS`=OFF：shorten the build time
+* ''BUILD_TESTS''=OFF，''BUILD_PERF_TESTS''=OFF：shorten the build time
-* `OPENCV_GENERATE_PKGCONFIG`=ON： enables  `.pc`  file generation along with standard CMake package
+* ''OPENCV_GENERATE_PKGCONFIG''=ON： enables  `.pc`  file generation along with standard CMake package
 * For more information, [https://docs.opencv.org/4.6.0/db/d05/tutorial_config_reference.html OpenCV: OpenCV configuration options reference]
@@ Line 284: / Line 284: @@
 check the output，install dependencies and reuse the full `cmake` command to make item to '''YES''' if it interests you
-eg. `OpenGL Support` and `OpenCL` should be '''YES''' if you want full hardware acceleration feature
+eg. ''OpenGL Support'' and ''OpenCL'' should be '''YES''' if you want full hardware acceleration feature
 After the generation, make :

@@ Line 282: / Line 282: @@
      -- Build files have been written to: /home/rock/OpenCV/opencv-4.6.0/build
-check the output，install dependencies and reuse the full `cmake` command to make item to **YES** if it interests you
+check the output，install dependencies and reuse the full `cmake` command to make item to '''YES''' if it interests you
-eg. `OpenGL Support` and `OpenCL` should be **YES** if you want full hardware acceleration feature
+eg. `OpenGL Support` and `OpenCL` should be '''YES''' if you want full hardware acceleration feature
 After the generation, make :

@@ Line 11: / Line 11: @@
 === Step 1: Get Ubuntu running  on ROCK Pi 4===
-To use OpenCV, a OS desktop is necessary. If your ROCK Pi 4 is running Ubuntu but without desktop, you can install Ubuntu mate desktop.
+To use OpenCV, an OS desktop is necessary. If your ROCK Pi 4 is running Ubuntu but without desktop, you can install Ubuntu mate desktop.
-     sudo apt install ubuntu-mate-core && sudo apt install ubuntu-mate-desktop
+     $ sudo apt install ubuntu-mate-core && sudo apt install ubuntu-mate-desktop
 === Step 2: Install all the recommended packages ===

@@ Line 5: / Line 5: @@
 This a guide to install OpenCV on your ROCK Pi 4 that running Ubuntu. All the instructions are done in terminal.
-== Steps Of Install OpenCV ==
+== Compile OpenCV ==
-=== Step 1: Get Ubuntu running  on ROCK Pi 4 (DDR: at least 4GB)===
+To compile OpenCV on ROCK Pi, we need at least 4GB ram and we recommend to compile on ubuntu arm64 images.
 To use OpenCV, a OS desktop is necessary. If your ROCK Pi 4 is running Ubuntu but without desktop, you can install Ubuntu mate desktop.