2.4.11に関してはここ
最初にraspberry piを更新しておく
sudo rpi-update
sudo apt-get update
sudo apt-get upgrade
ホストPCでOpenCV 3.1.0 と contrib 3.1.0 のソースをダウンロードし、展開して外付けHDDにコピー
USB HDDをRaspberry Pi 2に接続し、3.1.0 のフォルダーにbuildpiを作成し、cd buildpi
OpenCVのコンパイルに必要なファイルは、2.4.11のときにインストールしているが、今回はtesseract-ocrのために
sudo apt-get -y install libtesseract-dev libleptonica-dev
を実行
コンフィグレーションを設定
cmake -DCMAKE_BUILD_TYPE=RELEASE -DENABLE_VFPV3=ON -DENABLE_NEON=ON -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-3.1.0/modules -DBUILD_DOCS=OFF -DBUILD_TESTS=off -DBUILD_PERF_TESTS=OFF -DBUILD_TBB=ON -DBUILD_opencv_apps=OFF -DWITH_OPENCL=off -DWITH_1394=off -DWITH_CUDA=OFF -DWITH_CUFFT=OFF -DWITH_GIGEAPI=OFF -DWITH_OPENCLAMDBLAS=off -DWITH_OPENCLAMDFFT=off -DWITH_TBB=ON ..
time make -j4でビルドを行う
real 60m20.341s
user 203m50.500s
sys 7m10.870s
最後に
tesseract-ocrの英語辞書をダウンロードし、展開して内容をコピー
sudo cp -r tesseract-ocr/* /usr/share/tesseract-ocr/
以上
以下は、コンフィグレーション情報
General configuration for OpenCV 3.1.0 =====================================
Version control: unknown
Platform:
Host: Linux 4.1.15-v7+ armv7l
CMake: 2.8.9
CMake generator: Unix Makefiles
CMake build tool: /usr/bin/make
Configuration: RELEASE
C/C++:
Built as dynamic libs?: YES
C++ Compiler: /usr/bin/c++ (ver 4.6.3)
C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -pthread -fomit-frame-pointer -mfpu=neon -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG
C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -pthread -fomit-frame-pointer -mfpu=neon -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG
C Compiler: /usr/bin/gcc
C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -pthread -fomit-frame-pointer -mfpu=neon -ffunction-sections -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -pthread -fomit-frame-pointer -mfpu=neon -ffunction-sections -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG
Linker flags (Release):
Linker flags (Debug):
Precompiled headers: YES
Extra dependencies: dl m pthread rt
3rdparty dependencies: tbb
OpenCV modules:
To be built: core flann imgproc ml photo reg surface_matching video dnn fuzzy imgcodecs shape videoio highgui objdetect plot superres xobjdetect xphoto bgsegm bioinspired dpm face features2d line_descriptor saliency text calib3d ccalib datasets rgbd stereo structured_light tracking videostab xfeatures2d ximgproc aruco optflow stitching python2
Disabled: world contrib_world
Disabled by dependency: -
Unavailable: cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java python3 ts viz cvv hdf matlab sfm
GUI:
QT: NO
GTK+ 2.x: YES (ver 2.24.10)
GThread : YES (ver 2.40.0)
GtkGlExt: NO
OpenGL support: NO
VTK support: NO
Media I/O:
ZLib: /usr/lib/arm-linux-gnueabihf/libz.so (ver 1.2.7)
JPEG: libjpeg (ver 90)
WEBP: build (ver 0.3.1)
PNG: /usr/lib/arm-linux-gnueabihf/libpng.so (ver 1.2.49)
TIFF: build (ver 42 - 4.0.2)
JPEG 2000: build (ver 1.900.1)
OpenEXR: build (ver 1.7.1)
GDAL: NO
Video I/O:
DC1394 1.x: NO
DC1394 2.x: NO
FFMPEG: NO
codec: NO
format: NO
util: NO
swscale: NO
resample: NO
gentoo-style: NO
GStreamer: NO
OpenNI: NO
OpenNI PrimeSensor Modules: NO
OpenNI2: NO
PvAPI: NO
GigEVisionSDK: NO
UniCap: NO
UniCap ucil: NO
V4L/V4L2: NO/YES
XIMEA: NO
Xine: NO
gPhoto2: NO
Parallel framework: TBB (ver 4.3 interface 8002)
Other third-party libraries:
Use IPP: NO
Use VA: NO
Use Intel VA-API/OpenCL: NO
Use Eigen: YES (ver 3.1.0)
Use Cuda: NO
Use OpenCL: NO
Use custom HAL: NO
Python 2:
Interpreter: /usr/bin/python2.7 (ver 2.7.3)
Libraries: /usr/lib/libpython2.7.so (ver 2.7.3)
numpy: /usr/lib/pymodules/python2.7/numpy/core/include (ver 1.6.2)
packages path: lib/python2.7/dist-packages
Python 3:
Interpreter: NO
Python (for build): /usr/bin/python2.7
Java:
ant: NO
JNI: NO
Java wrappers: NO
Java tests: NO
Matlab: Matlab not found or implicitly disabled
Tests and samples:
Tests: NO
Performance tests: NO
C/C++ Examples: NO
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