基于Dragonboard 410c android系统实现人的眼球识别功能

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 <DetecTIonBasedTracker_jni.h>

#include <opencv2/core/core.hpp>

#include <opencv2/contrib/detecTIon_based_tracker.hpp>

 

#include <string>

#include <vector>

 

#include <android/log.h>

 

#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__()}");

}

}

 

="line" id="LC78"> JNIEXPORT void JNICALL Java_org_opencv_samples_fd_DetectionBasedTracker_nativeStart

="line" id="LC79"> (JNIEnv * jenv, jclass, jlong thiz)

="line" id="LC80"> {

="line" id="LC81"> try

="line" id="LC82"> { ="line" id="LC83"