通过JNI传递并返回OpenCv Mat对象 [英] Pass and return OpenCv Mat object with JNI

问题描述

我想这样在JNI中编写一个函数:

I would like to write a function in JNI like this:

JNIEXPORT jobject JNICALL Java_com_datumdroid_android_ocr_simple_HoughLine_nativeDetectLine

(JNIEnv * jenv，jclass，jstring fileInput，jobject垫)

(JNIEnv * jenv, jclass, jstring fileInput, jobject mat)

Java接口为:

nativeDetectLine( String fileInput, Mat mat);

现在，我想将Mat传递给JNI并更改其值.

Now I want to pass the Mat to JNI and change its value.

任何人都可以给我教程或指南吗? 具体来说就是如何使用jobjects.

Can anyone give me a tutorial or guide? Specifically how work with jobjects.

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