1. 建立java文件
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)); } } 2. 切换到工程src文件夹
javac getImageFeature.java
javah getImageFeature
生成 getImageFeature.h 文件
/* DO NOT EDIT THIS FILE - it is machine generated */#include <jni.h>/* Header for class getImageFeature */#ifndef _Included_getImageFeature#define _Included_getImageFeature#ifdef __cplusplusextern "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 3. VS2013建立dll工程
添加getImageFeature.h 头文件，再添加getImageFeature.cpp文件，实现对应函数（工程属性中需包含jdk下的include目录）
C:/Program Files/Java/jdk1.8.0_20/include
C:/Program Files/Java/jdk1.8.0_20/include/win32
#include "getImageFeatureDll.h"#include <opencv2/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;} 编译生成对应的dll
4. 执行java程序
将生成dll复制到java工程src文件夹下，java XX 运行程序
以上这篇java通过jni调用opencv处理图像的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持VeVb武林网。
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