基于Dragonboard 410c android系统实现人的眼球识别功

上一篇博客《基于Dragonboard410c android系统实现USB camera图像预览》，我们实现了如何在410c android系统上进行USB camera图像的预览功能，本文在此基础上，我们借助openncv库，实现人的眼球识别功能。

一 准备工具：

图1.Dragonboard410c开发板（android系统）

图2.显示器

图3.HDMI线

图4.罗技C525（usb camera）

二 移植opencv库：

1.下载地址：http://opencv.org/downloads.html

2.移植步骤：大家可以参照 Android 使用OpenCV的方法案例，包括如何可以通过省略openncv_manger.apk的方式实现整体移植。

3.搭好环境后，最主要是加入我们上传的例程：Eye_recognition.rar，并编译运行（官网的opencv可不提供这个功能，笔者可是无私奉献给大家哈）。

三 关键代码：

#include #include #include   #include #include   #include   #define LOG_TAG "FaceDetection/DetectionBasedTracker" #define LOGD(...) ((void)__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__))   using namespace std; using namespace cv;   inline void vector_Rect_to_Mat(vector<Rect>& v_rect, Mat& mat) { mat = Mat(v_rect, true); }   JNIEXPORT jlong JNICALL Java_org_opencv_samples_fd_DetectionBasedTracker_nativeCreateObject (JNIEnv * jenv, jclass, jstring jFileName, jint faceSize) { const char* jnamestr = jenv->GetStringUTFChars(jFileName, NULL); string stdFileName(jnamestr); jlong result = 0;     try { DetectionBasedTracker::Parameters DetectorParams; if (faceSize > 0) DetectorParams.minObjectSize = faceSize; result = (jlong)new DetectionBasedTracker(stdFileName, DetectorParams); } catch(cv::Exception e) { LOGD("nativeCreateObject catched cv::Exception: %s", e.what()); jclass je = jenv->FindClass("org/opencv/core/CvException"); if(!je) je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, e.what()); } catch (...) { LOGD("nativeCreateObject catched unknown exception"); jclass je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, "Unknown exception in JNI code {highgui::VideoCapture_n_1VideoCapture__()}"); return 0; }   return result; }   JNIEXPORT void JNICALL Java_org_opencv_samples_fd_DetectionBasedTracker_nativeDestroyObject (JNIEnv * jenv, jclass, jlong thiz) { try { ((DetectionBasedTracker*)thiz)->stop(); delete (DetectionBasedTracker*)thiz; } catch(cv::Exception e) { LOGD("nativeestroyObject catched cv::Exception: %s", e.what()); jclass je = jenv->FindClass("org/opencv/core/CvException"); if(!je) je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, e.what()); } catch (...) { LOGD("nativeDestroyObject catched unknown exception"); jclass je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, "Unknown exception in JNI code {highgui::VideoCapture_n_1VideoCapture__()}"); } }   JNIEXPORT void JNICALL Java_org_opencv_samples_fd_DetectionBasedTracker_nativeStart (JNIEnv * jenv, jclass, jlong thiz) { try { ((DetectionBasedTracker*)thiz)->run(); } catch(cv::Exception e) { LOGD("nativeStart catched cv::Exception: %s", e.what()); jclass je = jenv->FindClass("org/opencv/core/CvException"); if(!je) je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, e.what()); } catch (...) { LOGD("nativeStart catched unknown exception"); jclass je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, "Unknown exception in JNI code {highgui::VideoCapture_n_1VideoCapture__()}"); } }   JNIEXPORT void JNICALL Java_org_opencv_samples_fd_DetectionBasedTracker_nativeStop (JNIEnv * jenv, jclass, jlong thiz) { try { ((DetectionBasedTracker*)thiz)->stop(); } catch(cv::Exception e) { LOGD("nativeStop catched cv::Exception: %s", e.what()); jclass je = jenv->FindClass("org/opencv/core/CvException"); if(!je) je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, e.what()); } catch (...) { LOGD("nativeStop catched unknown exception"); jclass je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, "Unknown exception in JNI code {highgui::VideoCapture_n_1VideoCapture__()}"); } }   JNIEXPORT void JNICALL Java_org_opencv_samples_fd_DetectionBasedTracker_nativeSetFaceSize (JNIEnv * jenv, jclass, jlong thiz, jint faceSize) { try { if (faceSize > 0) { DetectionBasedTracker::Parameters DetectorParams = ((DetectionBasedTracker*)thiz)->getParameters(); DetectorParams.minObjectSize = faceSize; ((DetectionBasedTracker*)thiz)->setParameters(DetectorParams); }   } catch(cv::Exception e) { LOGD("nativeStop catched cv::Exception: %s", e.what()); jclass je = jenv->FindClass("org/opencv/core/CvException"); if(!je) je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, e.what()); } catch (...) { LOGD("nativeSetFaceSize catched unknown exception"); jclass je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, "Unknown exception in JNI code {highgui::VideoCapture_n_1VideoCapture__()}"); } }   JNIEXPORT void JNICALL Java_org_opencv_samples_fd_DetectionBasedTracker_nativeDetect (JNIEnv * jenv, jclass, jlong thiz, jlong imageGray, jlong faces) { try { vector<Rect> RectFaces; ((DetectionBasedTracker*)thiz)->process(*((Mat*)imageGray)); ((DetectionBasedTracker*)thiz)->getObjects(RectFaces); vector_Rect_to_Mat(RectFaces, *((Mat*)faces)); } catch(cv::Exception e) { LOGD("nativeCreateObject catched cv::Exception: %s", e.what()); jclass je = jenv->FindClass("org/opencv/core/CvException"); if(!je) je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, e.what()); } catch (...) { LOGD("nativeDetect catched unknown exception"); jclass je = jenv->FindClass("java/lang/Exception"); jenv->ThrowNew(je, "Unknown exception in JNI code {highgui::VideoCapture_n_1VideoCapture__()}"); } }  

四 例程共享：

下载地址：http://pan.baidu.com/s/1jIGz3dO