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    <p>i think it is a memory allocation issue with opencv_core.CvMemStorage. this is a class that's not exposed in your library. i am having the same problem. I'm using javacv (directly, not javacvpro) because i want to run multiple haar cascades (you can load only one with javacvpro or the older hypermedia.video.*). if i run ALL of them on EACH frame, i'm good. if i run a different detector on each frame (and then cycle thru the detectors again), i get this error after a few cycles.</p> <p>the snippet below FAILS, but it is what i want to do (process each subsequent frame with a different detector):</p> <pre><code>// Using JavaCV directly, not JavaCVPro! import com.googlecode.javacpp.Loader; import com.googlecode.javacv.*; import com.googlecode.javacv.*; import com.googlecode.javacv.cpp.*; String cascades[] = { "haarcascade_eye.xml", // 0 "haarcascade_eye_tree_eyeglasses.xml", // 1 "haarcascade_frontalface_alt.xml" // 2 } int detectors[] = {1,3}; // haar detectors to use String cascPath = "C:/opencv/data/haarcascades/"; // preload multiple classifiers. can do this with javacvpro, not with javacv or hypermedia.video.* void haarSetup() { for (int i = 0; i &lt; detectors.length; i++) { String classifierFile = cascPath+cascades[detectors[i]]; classifier[i] = new opencv_objdetect.CvHaarClassifierCascade(opencv_core.cvLoad(classifierFile)); } storage = opencv_core.CvMemStorage.create(); opencv_core.cvClearMemStorage(storage); // is this needed? couldn't hurt, right? } // contains list of preloaded haar cascades. code not included here... opencv_core.CvSeq features[] = new opencv_core.CvSeq[detectors.length]; int whichHaar = 0; // run one cascade per frame, then cycle through them. void processHaars(PImage piz) { // convert to IplImage... BufferedImage imgBuf = (BufferedImage) piz.getNative(); opencv_core.IplImage iplImgOut=opencv_core.IplImage.createFrom(imgBuf); // do one haar cascade per invocation. int ii = whichHaar; features[ii] = opencv_objdetect.cvHaarDetectObjects(iplImgOut, classifier[ii], storage, 1.1, 3, opencv_objdetect.CV_HAAR_DO_CANNY_PRUNING); whichHaar++; if (whichHaar &gt;= detectors.length){ whichHaar = 0; // is THIS causing the problem?? opencv_core.cvClearMemStorage(storage); } } </code></pre> <p>this snippet WORKS forever, but i don't want what it does (run all detectors on a single frame):</p> <pre><code>void processHaars(PImage piz) { // convert to IplImage... BufferedImage imgBuf = (BufferedImage) piz.getNative(); opencv_core.IplImage iplImgOut=opencv_core.IplImage.createFrom(imgBuf); for (ii=0; ii&lt;detectors.length; ii++) faces[ii] = opencv_objdetect.cvHaarDetectObjects(iplImgOut, classifier[ii], storage, 1.1, 3, opencv_objdetect.CV_HAAR_DO_CANNY_PRUNING); opencv_core.cvClearMemStorage(storage); } </code></pre> <p>If i find a full solution, I'll post it.</p>
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    1. POEXCEPTION_ACCESS_VIOLATION (0xc0000005) while using OpenCV in Processing language
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    1. USmahesh
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