java通过jni调用opencv处理图像的方法

public class getimagefeature {

   static {

   system.loadlibrary( "getimagefeaturedll" );

   }

   public native int getimagefeaturebyname(string filename);

   public native int getimagefeaturebymemory();

   public static void main(string[] args) {

   getimagefeature test= new getimagefeature();

   string filename = "d:/testpic/6af1399a64d10a399ad3247c01656bb7.jpg" ;

   system.out.println(test.getimagefeaturebyname(filename));

   }

  }

/* do not edit this file - it is machine generated */

#include < jni .h>

/* header for class getimagefeature */

#ifndef _included_getimagefeature

#define _included_getimagefeature

#ifdef __cplusplus

extern "c" {

#endif

  /*

  * class:  getimagefeature

  * method: getimagefeaturebyname

  * signature: (ljava/lang/string;)i

  */

  jniexport jint jnicall java_getimagefeature_getimagefeaturebyname

   (jnienv *, jobject, jstring);

  /*

  * class:  getimagefeature

  * method: getimagefeaturebymemory

  * signature: ()i

  */

  jniexport jint jnicall java_getimagefeature_getimagefeaturebymemory

   (jnienv *, jobject);

#ifdef __cplusplus

}

#endif

#endif

#include "getimagefeaturedll.h"

#include < opencv 2/opencv.hpp>

/*

* class:  getimagefeature

* method: getimagefeaturebyname

* signature: (ljava/lang/string;)i

*/

jniexport jint jnicall java_getimagefeature_getimagefeaturebyname

(jnienv *env, jobject obj, jstring filename)

{

  const char *str_filename;

  str_filename = env->getstringutfchars(filename, false);

  cv::mat image = cv::imread(str_filename);

  cv::imshow("test", image);

  cv::waitkey(20000);

  return 0;

}

/*

* class:  getimagefeature

* method: getimagefeaturebymemory

* signature: ()i

*/

jniexport jint jnicall java_getimagefeature_getimagefeaturebymemory

(jnienv *, jobject)

{

  return 0 ;

}