改变一个物体的颜色在Android应用程序 [英] Changing the color of an object in an Android application
问题描述
基本上我的目标是改变物体的颜色进行实时的涂料中的应用。为了实现这一目标,我按照以下概念:
- 我用的是精明的()梅托德寻找的对象。
- 使用findContours()的边缘检测。
- 在使用drawContours()用于着色的对象。如果有任何其他的概念,需要达到的目标,请建议我。我也试过,但没有得到确切的轮廓边缘。原始输入
预计产量
电流输出
我得到的图像灰度,但我希望在RGB模式。
这里是我的code:的
包com.example.imageprocess;
进口的java.util.ArrayList;
进口的java.util.List;
进口org.opencv.android.BaseLoaderCallback;
进口org.opencv.android.CameraBridgeViewBase;
进口org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;
进口org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;
进口org.opencv.android.LoaderCallbackInterface;
进口org.opencv.android.OpenCVLoader;
进口org.opencv.core.CvType;
进口org.opencv.core.Mat;
进口org.opencv.core.MatOfPoint;
进口org.opencv.core.Point;
进口org.opencv.core.Scalar;
进口org.opencv.core.Size;
进口org.opencv.imgproc.Imgproc;
进口android.app.Activity;
进口android.os.Bundle;
进口android.util.Log;
进口android.view.WindowManager;
公共类MainActivity扩展活动实现CvCameraViewListener2 {
私人垫mRgba;
私人垫mIntermediateMat;
私人垫mGray;
私人CameraBridgeViewBase mOpenCvCameraView;
私人BaseLoaderCallback mLoaderCallback =新BaseLoaderCallback(本){
@覆盖
公共无效onManagerConnected(INT状态){
开关(状态){
案例LoaderCallbackInterface.SUCCESS:
{
Log.i(OPENCVACTIVITY,OpenCV的加载成功);
//之后(!)OpenCV的初始化加载机库
//的System.loadLibrary(mixed_sample);
mOpenCvCameraView.enableView();
} 打破;
默认:
{
super.onManagerConnected(状态);
} 打破;
}
}
};
/ *公共MainActivity(){
Log.i(OPENCVACTIVITY,实例化新的+ this.getClass());
}
* /
@覆盖
保护无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
。getWindow()addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
的setContentView(R.layout.activity_main);
mOpenCvCameraView =(CameraBridgeViewBase)findViewById(R.id.tutorial2_activity_surface_view);
mOpenCvCameraView.setCvCameraViewListener(本);
}
@覆盖
公共无效的onPause()
{
super.onPause();
如果(mOpenCvCameraView!= NULL)
mOpenCvCameraView.disableView();
}
@覆盖
公共无效onResume()
{
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3,这一点,mLoaderCallback);
}
公共无效的onDestroy(){
super.onDestroy();
如果(mOpenCvCameraView!= NULL)
mOpenCvCameraView.disableView();
}
@覆盖
公共无效onCameraViewStarted(INT宽度,高度INT){
// TODO自动生成方法存根
mRgba =新垫(高度,宽度,CvType.CV_8UC4);
mIntermediateMat =新垫(高度,宽度,CvType.CV_8UC4);
mGray =新垫(高度,宽度,CvType.CV_8UC1);
}
@覆盖
公共无效onCameraViewStopped(){
mRgba.release();
mGray.release();
mIntermediateMat.release();
}
@覆盖
公共垫onCameraFrame(CvCameraViewFrame inputFrame){
垫gaussian_output =新垫();
mRgba = inputFrame.rgba();
Imgproc.Canny(inputFrame.gray(),mIntermediateMat,80,100);
Imgproc.cvtColor(mIntermediateMat,mRgba,Imgproc.COLOR_YUV2RGBA_NV21,4);
Imgproc.GaussianBlur(mIntermediateMat,gaussian_output,新尺寸(5,5),5);
名单< MatOfPoint>轮廓=新的ArrayList< MatOfPoint>();
Imgproc.findContours(gaussian_output,轮廓,新材料(),Imgproc.RETR_EXTERNAL,Imgproc.CHAIN_APPROX_SIMPLE,新点(0,0));
标色=新的标量(165,30,215);
// Imgproc.drawContours(gaussian_output,轮廓,-1,色,3);
垫层次=新垫();
//找到轮廓:
Imgproc.findContours(gaussian_output,轮廓,层次结构,Imgproc.RETR_TREE,Imgproc.CHAIN_APPROX_SIMPLE);
为(中间体contourIdx = 0; contourIdx&其中; contours.size(); contourIdx ++){
Imgproc.drawContours(gaussian_output,轮廓,contourIdx,颜色,-1);
}
返回gaussian_output;
}
}
我相信你所做的灰度图像移动到彩色图像的错误。
尝试:
Imgproc.cvtColor(mRgba,mIntermediateMat,Imgproc.COLOR_YUV2RGBA_NV21,4);
代替:
Imgproc.cvtColor(mIntermediateMat,mRgba,Imgproc.COLOR_YUV2RGBA_NV21,4);
Basically my goal is change the color of object in real time for paint application. To achieve this goal I follow the following concepts:
- I use the canny() metod for finding the object.
- Using findContours() for edge detection.
- using drawContours() for coloring the object. If there is any other concept require to achieve the goal please suggest me. I have tried but not getting exact contours edge. original input
Expected output
Current output
I am getting image in gray scale but i want in rgb mode.
here is my code:
package com.example.imageprocess;
import java.util.ArrayList;
import java.util.List;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.MatOfPoint;
import org.opencv.core.Point;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.imgproc.Imgproc;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.WindowManager;
public class MainActivity extends Activity implements CvCameraViewListener2{
private Mat mRgba;
private Mat mIntermediateMat;
private Mat mGray;
private CameraBridgeViewBase mOpenCvCameraView;
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i("OPENCVACTIVITY", "OpenCV loaded successfully");
// Load native library after(!) OpenCV initialization
// System.loadLibrary("mixed_sample");
mOpenCvCameraView.enableView();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
/* public MainActivity() {
Log.i("OPENCVACTIVITY", "Instantiated new " + this.getClass());
}
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_main);
mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.tutorial2_activity_surface_view);
mOpenCvCameraView.setCvCameraViewListener(this);
}
@Override
public void onPause()
{
super.onPause();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
@Override
public void onResume()
{
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this, mLoaderCallback);
}
public void onDestroy() {
super.onDestroy();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
@Override
public void onCameraViewStarted(int width, int height) {
// TODO Auto-generated method stub
mRgba = new Mat(height, width, CvType.CV_8UC4);
mIntermediateMat = new Mat(height, width, CvType.CV_8UC4);
mGray = new Mat(height, width, CvType.CV_8UC1);
}
@Override
public void onCameraViewStopped() {
mRgba.release();
mGray.release();
mIntermediateMat.release();
}
@Override
public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
Mat gaussian_output = new Mat();
mRgba = inputFrame.rgba();
Imgproc.Canny(inputFrame.gray(), mIntermediateMat, 80, 100);
Imgproc.cvtColor(mIntermediateMat, mRgba, Imgproc.COLOR_YUV2RGBA_NV21, 4);
Imgproc.GaussianBlur(mIntermediateMat, gaussian_output, new Size(5, 5), 5);
List<MatOfPoint> contours = new ArrayList<MatOfPoint>();
Imgproc.findContours( gaussian_output, contours, new Mat(),Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_SIMPLE, new Point(0,0) );
Scalar color = new Scalar(165, 30, 215);
// Imgproc.drawContours(gaussian_output, contours, -1, color, 3);
Mat hierarchy = new Mat();
// find contours:
Imgproc.findContours(gaussian_output, contours, hierarchy, Imgproc.RETR_TREE,Imgproc.CHAIN_APPROX_SIMPLE);
for (int contourIdx = 0; contourIdx < contours.size(); contourIdx++) {
Imgproc.drawContours(gaussian_output, contours, contourIdx,color, -1);
}
return gaussian_output;
}
}
I believe that you made the error of moving the grayscale image to the coloured image.
Try:
Imgproc.cvtColor(mRgba, mIntermediateMat, Imgproc.COLOR_YUV2RGBA_NV21, 4);
Instead of:
Imgproc.cvtColor(mIntermediateMat, mRgba, Imgproc.COLOR_YUV2RGBA_NV21, 4);
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