OpenCV

https://opencv.org/

https://opencv.org/releases.html

Installation

OSX

brew install opencv3 --with-ffmpeg --with-tbb --with-contrib

Trouble shooting

Fix tesseract problem.

brew install tesseract --with-all-languages

Fix libGL, libPng, libTIFF, libJPEG not found.

sudo ln -sf /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib /usr/local/lib/libGL.dylib

sudo ln -sf /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libPng.dylib /usr/local/lib/libpng.dylib

sudo ln -sf /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libTIFF.dylib /usr/local/lib/libtiff.dylib

sudo ln -sf /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libJPEG.dylib /usr/local/lib/libjpeg.dylib

Fix hdf5 problem.

brew reinstall --build-from-source octave

Android

Build SDK from sourece and WITH_EXTRA_MOUDLES

Sources

https://github.com/opencv/opencv https://github.com/opencv/opencv_contrib

Guide

http://yangchao.me/post/build-opencv-android-sdk/

Build with CLI

$ brew install cmake ninja ant

$ cd ~/OpenCV/Source/3.4.1/platforms/

$ ./build_sdk.py --ndk_path [NDK_PATH] --sdk_path [ANDROID_SDK_PATH] --extra_modules_path [EXTRA_MOUDLES_PATH] [DEST_PATH] [SOURCE_PATH]

$ cd [DEST_PATH]

$ make

$ make install

Build with CMake GUI

Open CMake GUI application.

Where is the source code : ~/OpenCV/Source/3.4.1

Where to build the binaries : ~/OpenCV/Source/3.4.1/platforms/android/build

Press configure button, and choose Specify toolchain file for cross-compiling, and browse file ~/OpenCV/Source/3.4.1/platforms/android/android.toolchain.cmake and press continue.

Then, find entity OPENCV_EXTRA_MOUDLES_PATH and set value to ~/OpenCV/Source/opencv_contrib , and press generate.

$ cd ~/OpenCV/Source/3.4.1/platforms/android/build

$ make

android.mk

LOCAL_PATH := $(call my-dir)

OPENCV_ANDROID_SDK := ~/OpenCV/SDK/3.4.1

# add OpenCV
include $(CLEAR_VARS)
OPENCV_INSTALL_MODULES:=on
OPENCV_LIB_TYPE:=STATIC
ifdef OPENCV_ANDROID_SDK
  ifneq ("","$(wildcard $(OPENCV_ANDROID_SDK)/OpenCV.mk)")
    include ${OPENCV_ANDROID_SDK}/OpenCV.mk
  else
    include ${OPENCV_ANDROID_SDK}/sdk/native/jni/OpenCV.mk
  endif
else
  include ../../sdk/native/jni/OpenCV.mk
endif

OPENCL_ANDROID_SDK := ~/OpenCL/SDK/1.2

ifndef OPENCL_SDK
  #$(error Specify OPENCL_SDK to Android OpenCL SDK location)
endif

# add OpenCL
LOCAL_C_INCLUDES += $(LOCAL_PATH)

#Adreno OpenCL Lib
#LOCAL_LDLIBS += $(LOCAL_PATH)/../jniLibs/$(TARGET_ARCH_ABI)/libOpenCL.so

#Mali OpenCL Lib
#LOCAL_LDLIBS += $(LOCAL_PATH)/../jniLibs/$(TARGET_ARCH_ABI)/libGLES_mali.so

LOCAL_MODULE    := OpenCVProcessor
LOCAL_SRC_FILES := jni.c OpenCVProcessor.cpp
LOCAL_LDLIBS    += -llog -lGLESv2 -lEGL

include $(BUILD_SHARED_LIBRARY)