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How can I customize ImageTargets sample

I try to costumize ImageTargets sample.

I want to implement image recognition just replacing the default sample pictures.

I try to replace the default ones with my own pictures  but  when I open a Cygwin bash shell to build the native C++ source files with the NDK package of the Android SDK its output is the following:

Android NDK: ERROR:jni/Android.mk:QCAR-prebuilt: LOCAL_SRC_FILES points to a missing fileAndroid NDK: Check that jni/../../../build/lib/armeabi/libQCAR.so exists  or that its path is correct/cygdrive/c/Development/Android/android-ndk-r8/build/core/prebuilt-library.mk:45: *** Android NDK: Aborting    .  Stop. Which is the best way of replacing  the default background images with my own ones without having this problem? 

 

Thank you very much for your really crucial guidance.

I successfully replaced the sample pictures with ones that I carefully selected so as to be according to your important instructions concerning the rating of each one and the image recognition works great.