基于opencv的相机之拼图功能实现（十）

本文主要是介绍基于opencv的相机之拼图功能实现（十），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

简介

　　本篇是对实现图片处理功能:【拼图】实现的记录。

实现原理

　　点击进入该功能之后，首先会初始化一个背景图片。背景中对应放图片的拼图位置被初始化为空白区域，点击该空白区域，会进入图库中进行图片选择。
选好图片之后，将回到本功能的界面；同时被点击的空白区域，将被刚刚选择的图片填充。
具体可以参考资料：opencv实现拼图功能 http://blog.csdn.net/u011630458/article/details/46116403

具体代码

　　1、初始化

int picaddr2[4][4] = {{2, 49, 2, 49}, {51, 98, 2, 24}, {51, 98, 26, 49}, {2, 98, 51, 98}};
int picaddrTmp[4][4] = {{0, 0, 0, 0}, {0, 0, 0, 0}, {0, 0, 0, 0}, {0, 0, 0, 0}};void MyResize(Mat& mat1, Mat& mat2, int width, int height){IplImage pI_1 = mat1, pI_2;mat2 = cv::Mat(height, width, CV_8UC3, 1);pI_2 = mat2;cvResize(&pI_1, &pI_2, 1);
}JNIEXPORT void JNICALL Java_com_example_pingtu_MyPingtuJNI_PingTuInit
(JNIEnv *, jclass, jlong imagePingTuInit, jint value){Mat mat = Mat(*((Mat*)imagePingTuInit));Mat srcROI[4];Mat imageROI[4];Mat srcTmp = Mat(mat.size(), CV_8UC3, cv::Scalar(255, 255, 255));Mat tmp;int i, j;int width = mat.rows;int height = mat.cols;if(value == 2){for(i=0; i< 4; i++){for(j=0; j<4; j++){if(j<2){picaddrTmp[i][j] = picaddr2[i][j] * height / 100;}else{picaddrTmp[i][j] = picaddr2[i][j] * width / 100;}}srcROI[i] = srcTmp;imageROI[i] = mat(cv::Rect(picaddrTmp[i][0], picaddrTmp[i][2], picaddrTmp[i][1] - picaddrTmp[i][0], picaddrTmp[i][3] - picaddrTmp[i][2]));MyResize(srcROI[i], tmp, picaddrTmp[i][1] - picaddrTmp[i][0], picaddrTmp[i][3] - picaddrTmp[i][2]);addWeighted(imageROI[i], 0, tmp, 1, 0.0, imageROI[i]);}}
}

   picaddr2用来确定拼图模板，本例中只实现了一个可以拼图四张的模板。然后在PingTuInit函数中，传入的图像imagePingTuInit，表示为背景图片，根据picaddr2的模板信息，计算出4张拼图对应的位置信息，并保存到数组picaddrTmp中。接着将图片中对应拼图位置用srcTmp设置为全白像素。

　　2、拼图实现

    public class ButtonListener implements OnClickListener, OnTouchListener{@Overridepublic boolean onTouch(View arg0, MotionEvent arg1) {...........if(arg1.getAction() == MotionEvent.ACTION_UP){touchX = (int)arg1.getX();touchY = (int)arg1.getY();if((0 < touchX) && (myPingtuVariable.screenWidth / 2 > touchX)&& (myPingtuVariable.screenHeight /14  < touchY) && (myPingtuVariable.screenHeight / 14 * 6 > touchY)){myPingtuVariable.curPicPingTu = 1;Intent intent = new Intent(MyPingtuActivity.this, mapstorageActivity.class);  Bundle bun = new Bundle();  bun.putInt("curFilePath", myPingtuVariable.isPingTu);  intent.putExtras(bun);startActivityForResult(intent, 10);}else if((myPingtuVariable.screenWidth / 2 < touchX) && (myPingtuVariable.screenWidth > touchX)&& (myPingtuVariable.screenHeight /14  < touchY) && (myPingtuVariable.screenHeight / 28 * 7 > touchY)){myPingtuVariable.curPicPingTu = 2;Intent intent = new Intent(MyPingtuActivity.this, mapstorageActivity.class);  Bundle bun = new Bundle();  bun.putInt("curFilePath", myPingtuVariable.isPingTu);  intent.putExtras(bun);startActivityForResult(intent, 10);}else if((myPingtuVariable.screenWidth / 2 < touchX) && (myPingtuVariable.screenWidth > touchX)&& (myPingtuVariable.screenHeight /28 * 7 < touchY) && (myPingtuVariable.screenHeight / 14 * 6 > touchY)){myPingtuVariable.curPicPingTu = 3;Intent intent = new Intent(MyPingtuActivity.this, mapstorageActivity.class);  Bundle bun = new Bundle();  bun.putInt("curFilePath", myPingtuVariable.isPingTu);  intent.putExtras(bun);startActivityForResult(intent, 10);}else if((0 < touchX) && (myPingtuVariable.screenWidth > touchX)&& (myPingtuVariable.screenHeight /14 * 6 < touchY) && (myPingtuVariable.screenHeight / 14 * 11 > touchY)){myPingtuVariable.curPicPingTu = 4;Intent intent = new Intent(MyPingtuActivity.this, mapstorageActivity.class);  Bundle bun = new Bundle();  bun.putInt("curFilePath", myPingtuVariable.isPingTu);  intent.putExtras(bun);startActivityForResult(intent, 10);}............    }@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubsuper.onActivityResult(requestCode, resultCode, data);myPingtuVariable.curPicName = data.getExtras().getString("PingTuPicture");myPingtuVariable.myPingtuFunction.PicPingTuWorking(MyPingtuActivity.this, myPingtuVariable);}JNIEXPORT void JNICALL Java_com_example_pingtu_MyPingtuJNI_PingTuWork
(JNIEnv *, jclass, jlong imagePingTuSrc, jlong imagePingTuROI, jint value){Mat matSrc = Mat(*((Mat*)imagePingTuSrc));Mat matROI = Mat(*((Mat*)imagePingTuROI));int Width = matSrc.rows;int Height = matSrc.cols;Mat srcROI[4];Mat imageROI[4];Mat tmp;if((value > 3) || (value < 0)){return;}srcROI[value] = matROI;imageROI[value] = matSrc(cv::Rect(picaddrTmp[value][0], picaddrTmp[value][2], picaddrTmp[value][1] - picaddrTmp[value][0], picaddrTmp[value][3] - picaddrTmp[value][2]));MyResize(srcROI[value], tmp, picaddrTmp[value][1] - picaddrTmp[value][0], picaddrTmp[value][3] - picaddrTmp[value][2]);addWeighted(imageROI[value], 0, tmp, 1, 0.0, imageROI[value]);
}

     当点击到背景图片中不同位置之后，onTouch函数会根据坐标判断，当前需要更新填充的空白区域。接着进入到mapstorageActivity中进行图片选择。mapstorageActivity中选好图片之后，返回到onActivityResult函数中，获得当前选择的图片，最后将该图片传入ndk中函数PingTuWork中，实现空白区域的更新填充。

效果演示

　　对应的效果图片如下：

              背景图像                                   拼图效果

具体演示下载：http://download.csdn.net/detail/u011630458/9261617

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