[TOC]
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OpenCV 腐蚀图片#TODO
- [] 【在 VS 上配置 OpenCV 工程】上传到个人网站。
#搭建工程
##VS 工程
VS 工程搭建参考【在 VS 上配置 OpenCV 工程】。
VS 工程目录结构：
##AS 工程
AS 工程搭建参考：
AS 工程目录结构：
#修改工程
##VS 工程
###修改 main.cpp
#include <opencv2\highgui\highgui.hpp>
#include <opencv2\imgproc\imgproc.hpp>
using namespace cv;
int main() {
Mat srcImageMat = imread("test.png");
imshow("srcImage", srcImageMat);
Mat destImageMat;
Mat element = getStructuringElement(MORPH_RECT, Size(10, 10));
erode(srcImageMat, destImageMat, element);
imshow("destImage", destImageMat);
waitKey(0);
return 0;
}
###添加 test.png 到 main.cpp 所在目录
###运行结果
##AS 工程
所有修改内容：
###修改 activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="https://schemas.android.com/apk/res/android"
xmlns:tools="https://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="io.weichao.opencv.MainActivity">
<ImageView
android:id="@+id/src_image"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ImageView
android:id="@+id/dest_image"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
###添加 test.png
###修改 opencv.cpp
#include <jni.h>
#include <opencv2/imgproc/imgproc.hpp>
using namespace cv;
extern "C"
JNIEXPORT jintArray JNICALL
Java_io_weichao_opencv_MainActivity_nErode(JNIEnv *env, jobject obj /* this */,
jintArray pixelArray,
int width, int height) {
jint *pixelPoint;
pixelPoint = env->GetIntArrayElements(pixelArray, JNI_FALSE);
Mat srcImageMat(height, width, CV_8UC4, (unsigned char *) pixelPoint);
Mat destImageMat;
Mat element = getStructuringElement(MORPH_RECT, Size(10, 10));
erode(srcImageMat, destImageMat, element);
int size = width * height;
jintArray retArray = env->NewIntArray(size);
jint *ptr = (jint *) destImageMat.ptr(0);
env->SetIntArrayRegion(retArray, 0, size, ptr);
env->ReleaseIntArrayElements(pixelArray, pixelPoint, 0);
return retArray;
}
###修改 MainActivity.java
package io.weichao.opencv;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
import org.opencv.android.OpenCVLoader;
public class MainActivity extends AppCompatActivity {
static {
if (OpenCVLoader.initDebug()) {
System.loadLibrary("opencv");
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView srcImage = (ImageView) findViewById(R.id.src_image);
ImageView destImage = (ImageView) findViewById(R.id.dest_image);
/*显示原图*/
Bitmap srcBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.test);
srcImage.setImageBitmap(srcBitmap);
/*处理图像*/
int width = srcBitmap.getWidth();
int height = srcBitmap.getHeight();
int[] pixelArray = new int[width * height];
srcBitmap.getPixels(pixelArray, 0, width, 0, 0, width, height);
pixelArray = nErode(pixelArray, width, height);
/*显示处理后的图像*/
Bitmap destBitmap = Bitmap.createBitmap(pixelArray, width, height, Bitmap.Config.ARGB_8888);
destImage.setImageBitmap(destBitmap);
}
private native int[] nErode(int[] pixelArray, int width, int height);
}
###运行结果
