Adding Tesseract and Opencv to Android.mk (Android Studio)

Question

Adding Tesseract and Opencv to Android.mk (Android Studio)

I followed the instructions here and successfully added OpenCV. But I have also been trying to add tesseract to Android.mk for several days now and have been unable to do this.

I have android.cpp that uses tesseract, so I have to include the dependency in my Android.mk. I found this post that had an almost exact problem, and he decided to import the libtess.so and liblept.so files into Android.mk but didn’t explain how to do this, so I looked and found this post which shows how to link before created libraries. Therefore, based on the fact that I tried this Android.mk:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := liblept
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/liblept.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libtess
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/libtess.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
OPENCV_PACKAGE_DIR:= /Users/danielsierraf/Documents/OpenCV-2.4.10-android-sdk/sdk
OPENCV_CAMERA_MODULES := off
include $(OPENCV_PACKAGE_DIR)/native/jni/OpenCV.mk

LOCAL_MODULE    := run_detection
LOCAL_SHARED_LIBRARIES := libtess
LOCAL_SRC_FILES := text_detect.cpp android.cpp
LOCAL_LDLIBS    += -landroid -llog -ldl

include $(BUILD_SHARED_LIBRARY)

And I got this conclusion:

[armeabi-v7a] Prebuilt       : liblept.so <= src/main/jni/../libs/armeabi-v7a/
[armeabi-v7a] Install        : liblept.so => src/main/jniLibs/armeabi-v7a/liblept.so
[armeabi-v7a] Compile++ thumb: run_detection <= text_detect.cpp
In file included from src/main/jni/text_detect.h:4:0,
                 from src/main/jni/text_detect.cpp:10:
src/main/jni/../../../../tess-two/jni/com_googlecode_tesseract_android/src/api/baseapi.h:32:22: fatal error: platform.h: No such file or directory
 #include "platform.h"
                      ^
compilation terminated.

, , libtess, , libtess.so, , liblept.so, text_detect.cpp, :

include $(CLEAR_VARS)
LOCAL_MODULE := libtess
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/libtess.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

, libible libtess, , . Android.mk $( all-subdir-makefiles), libtess liblept, all-subdir-makefiles.

jni:

Android.mk
Application.mk
text_detect/
     Android.mk
     android.cpp
     text_detect.cpp
     text_detect.h

Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := liblept
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/liblept.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libtess
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/libtess.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

include $(call all-subdir-makefiles)

textdetect/Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

OPENCV_PACKAGE_DIR:= /Users/danielsierraf/Documents/OpenCV-2.4.10-android-sdk/sdk
OPENCV_CAMERA_MODULES := off
include $(OPENCV_PACKAGE_DIR)/native/jni/OpenCV.mk

LOCAL_MODULE    := run_detection
LOCAL_SHARED_LIBRARIES := libtess
LOCAL_SRC_FILES := text_detect.cpp android.cpp
LOCAL_LDLIBS    += -landroid -llog -ldl

include $(BUILD_SHARED_LIBRARY)

:

[armeabi-v7a] Prebuilt       : liblept.so <= src/main/jni/../libs/armeabi-v7a/
[armeabi-v7a] Install        : liblept.so => src/main/jniLibs/armeabi-v7a/liblept.so
[armeabi-v7a] Prebuilt       : libtess.so <= src/main/jni/../libs/armeabi-v7a/
[armeabi-v7a] Install        : libtess.so => src/main/jniLibs/armeabi-v7a/libtess.so
[armeabi] Prebuilt       : liblept.so <= src/main/jni/../libs/armeabi/
[armeabi] Install        : liblept.so => src/main/jniLibs/armeabi/liblept.so
[armeabi] Prebuilt       : libtess.so <= src/main/jni/../libs/armeabi/
[armeabi] Install        : libtess.so => src/main/jniLibs/armeabi/libtess.so
[mips] Prebuilt       : liblept.so <= src/main/jni/../libs/mips/
[mips] Install        : liblept.so => src/main/jniLibs/mips/liblept.so
[mips] Prebuilt       : libtess.so <= src/main/jni/../libs/mips/
[mips] Install        : libtess.so => src/main/jniLibs/mips/libtess.so
[x86] Prebuilt       : liblept.so <= src/main/jni/../libs/x86/
[x86] Install        : liblept.so => src/main/jniLibs/x86/liblept.so
[x86] Prebuilt       : libtess.so <= src/main/jni/../libs/x86/
[x86] Install        : libtess.so => src/main/jniLibs/x86/libtess.so

, , Android.mk, textdetect/Android.mk

, ? , ? ?

EDIT:

@ph0b LOCAL_EXPORT_C_INCLUDES Makefiles ( , ), . platform.h, , .

Now, after I made this change, I had another error No such file or directory #include "com_googlecode_tesseract_android/src/api/baseapi.h", and I thought that this was due to the fact that he did not compile tesseract before run_detection, which depends on him. Well, this is not a problem, it still compiles run_detectionbefore tesseract, but it is not a problem, it was much simpler, and I'm so stupid for spending so much time on this error. The problem was that he was not found com_googlecode_tesseract_android/src/api/baseapi.h, because I do not have a way to do this, so I copied com_googlecode_tesseract_androidand com_googlecode_leptonica_androidfrom tess-two and added $(LOCAL_PATH)to LOCAL_EXPORT_C_INCLUDES. This is my final decision:

Folder structure

jni:

Android.mk
Application.mk
text_detect.cpp
android.cpp
text_detect.h
com_googlecode_leptonica_android
com_googlecode_tesseract_android

Android.mk

LOCAL_PATH := $(call my-dir)

#leptonica
LEPTONICA_LOCAL := $(LOCAL_PATH)/com_googlecode_leptonica_android
LEPTONICA_PATH := $(LEPTONICA_LOCAL)/src

include $(CLEAR_VARS)

LOCAL_MODULE := liblept
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/liblept.so
LOCAL_EXPORT_C_INCLUDES := \
  $(LEPTONICA_LOCAL) \
  $(LEPTONICA_PATH)/src

include $(PREBUILT_SHARED_LIBRARY)

#tesseract
TESSERACT_LOCAL := $(LOCAL_PATH)/com_googlecode_tesseract_android
TESSERACT_PATH := $(TESSERACT_LOCAL)/src

include $(CLEAR_VARS)

LOCAL_MODULE := libtess
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/libtess.so
LOCAL_EXPORT_C_INCLUDES := \
  $(LOCAL_PATH) \
  $(TESSERACT_PATH)/api \
  $(TESSERACT_PATH)/ccmain \
  $(TESSERACT_PATH)/ccstruct \
  $(TESSERACT_PATH)/ccutil \
  $(TESSERACT_PATH)/classify \
  $(TESSERACT_PATH)/cube \
  $(TESSERACT_PATH)/cutil \
  $(TESSERACT_PATH)/dict \
  $(TESSERACT_PATH)/opencl \
  $(TESSERACT_PATH)/neural_networks/runtime \
  $(TESSERACT_PATH)/textord \
  $(TESSERACT_PATH)/viewer \
  $(TESSERACT_PATH)/wordrec \
  $(LEPTONICA_PATH)/src \
  $(TESSERACT_LOCAL)
LOCAL_SHARED_LIBRARIES := liblept

include $(PREBUILT_SHARED_LIBRARY)

#opencv
include $(CLEAR_VARS)
OPENCV_PACKAGE_DIR:= /Users/danielsierraf/Documents/OpenCV-2.4.10-android-sdk/sdk
OPENCV_CAMERA_MODULES := off
include $(OPENCV_PACKAGE_DIR)/native/jni/OpenCV.mk

LOCAL_MODULE    := run_detection
LOCAL_SRC_FILES := text_detect.cpp android.cpp
LOCAL_LDLIBS    += -landroid -llog -ldl
LOCAL_SHARED_LIBRARIES += libtess liblept

include $(BUILD_SHARED_LIBRARY)

+4

android android studio android-ndk tesseract android.mk

Mauricio May 04, '15 at 22:45

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1 answer

ph0b · Accepted Answer · 2015-05-06T09:39:13+0000

, ndk-build . , all-subdir-makefiles, ndk, Android.mk. include $(call all-subdir-makefiles) Android.mk.

, , , jni. - . tess-two/jni ? tess-two/jni/com_googlecode_*_android/src/*. , , LOCAL_EXPORT_C_INCLUDES (, Makefiles: https://github.com/rmtheis/tess-two/blob/master/tess-two/jni/com_googlecode_tesseract_android/Android.mk#L33)

liblept libtess: LOCAL_SHARED_LIBRARIES := liblept libtess.

, : libtess liblept .so tess-two/jni/Android.mk Application.mk, tess-two (copy the tess -/JNI/Application.mk). libtess liblept .

Adding Tesseract and Opencv to Android.mk (Android Studio)

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