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POJNIEXPORT: getIplImageFromIntArray compile error
 

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    <p>I want to take a picture with my Samsung GT-P1000, then edit this picture with some OpenCV functions and display it again on the tablet. I'm trying to edit the sample from this website: <a href="http://www.stanford.edu/~zxwang/android_opencv.html" rel="nofollow">http://www.stanford.edu/~zxwang/android_opencv.html</a></p> <p>However I've changed the project abit and am using OpenCV 2.3.1</p> <pre><code>if(requestCode == ACTIVITY_SELECT_IMAGE &amp;&amp; resultCode == RESULT_OK) { try { Uri currImageURI = data.getData(); String[] proj = {Images.Media.DATA, Images.Media.ORIENTATION}; Cursor cursor = managedQuery(currImageURI, proj, null, null, null); int columnIndex = cursor.getColumnIndex(proj[0]); cursor.moveToFirst(); mCurrentImagePath = cursor.getString(columnIndex); Bitmap bitmap = BitmapFactory.decodeFile(mCurrentImagePath); Log.i(TAG, mCurrentImagePath); int width = bitmap.getWidth(); int height = bitmap.getHeight(); int[] pixels = new int[width * height]; bitmap.getPixels(pixels, 0, width, 0, 0, width, height); opencv.setSourceImage(pixels, width, height); ...... &lt;some more irrelevant Java code&gt; .... </code></pre> <p>The sample project I'm using uses a JNIEXPORT JNICALL to load the bitmap as an IplImage so it's usable to edit with OpenCV. The code is listed below. However when I try to use ndk-build to compile the whole thing i get an error saying: <strong>../jni_part.cpp:28: undefined reference to 'getIplImageFromIntArray'.</strong> Does this mean I'm missing an import in my .cpp file or somethign else? I tried to google with 'getIplImageFromIntArray' but can't find any help. Can someone explain to me what is going wrong?</p> <pre><code>#ifdef __cplusplus extern "C" { #endif IplImage * pImage = NULL IplImage * loadpixels(int * pixels, int width, int height); IplImage * getIplImageFromIntArray (JNIEnv* env, jintArray array_data, jint width, jint height); JNIEXPORT jboolean JNICALL Java_org_opencv_example_pruts_Test1OpenCV_setSourceImage (JNIEnv * env, jobject thiz, jintArray photo_data, jint width, jint height) { if(pImage != NULL) { cvReleaseImage(&amp;pImage); pImage = NULL; } pImage = getIplImageFromIntArray(env, photo_data, width, height); if(pImage == 0) { return 0; } return 1; } </code></pre>
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