长子网站建设,导购网站模板免费下载,抖音带运营3种合作方式,宁波seo公司在Android上构建人脸检测程序
目录
1、导入mlKit依赖包2、配置人脸检测器并且获取人脸检测器3、加载图片资源4、调用人脸检测器5、绘制矩形边框6、完整代码7、效果展示
1、导入mlKit依赖包
dependencies {// ...// Use this dependency to bundle the model with your appi…在Android上构建人脸检测程序
目录
1、导入mlKit依赖包2、配置人脸检测器并且获取人脸检测器3、加载图片资源4、调用人脸检测器5、绘制矩形边框6、完整代码7、效果展示
1、导入mlKit依赖包
dependencies {// ...// Use this dependency to bundle the model with your appimplementation com.google.mlkit:face-detection:16.1.5
}依赖地址mlkit
2、配置人脸检测器并且获取人脸检测器
// 1、配置人脸检测器
FaceDetectorOptions faceDetectorOptions new FaceDetectorOptions.Builder().setPerformanceMode(PERFORMANCE_MODE_FAST).build();
//2、获取人脸检测器
FaceDetector detector FaceDetection.getClient(faceDetectorOptions);人脸检测器Api有如下这里使用了最简单的作为样例 3、加载图片资源
// 3、从资源中加载图片
bitmap BitmapFactory.decodeResource(getResources(), R.drawable.test3);
imgView.setImageBitmap(bitmap);
InputImage image InputImage.fromBitmap(bitmap, 0);这里使用Bitmap将图片进行转化然后制作成InputImage流。
4、调用人脸检测器
// 4、处理图片detector.process(image).addOnSuccessListener(new OnSuccessListenerListFace() {Overridepublic void onSuccess(ListFace faces) {Log.e(TAG, onSuccess: 1);imgView.setImageBitmap(drawWithRectangle(faces));}}).addOnFailureListener(new OnFailureListener() {Overridepublic void onFailure(NonNull Exception e) {Notice();}});5、绘制矩形边框
private void Notice() {Toast.makeText(this, 识别失败, Toast.LENGTH_SHORT);
}/**** 为人脸绘制边框** param faces 采集的人脸* return {link Bitmap}*/
private Bitmap drawWithRectangle(ListFace faces) {//复制一个新的BitmapBitmap copiedBitmap bitmap.copy(bitmap.getConfig(), true);;for (Face face : faces) {//获取边界状态Rect bounds face.getBoundingBox();// 初始化PaintPaint paint new Paint();// 设置矩形颜色paint.setColor(Color.BLUE);// 设置绘制样式为轮廓绘制paint.setStyle(Paint.Style.STROKE);// 设置为你需要的宽度paint.setStrokeWidth(10);Canvas canvas new Canvas(copiedBitmap);canvas.drawRect(bounds, paint);}return copiedBitmap;
}
6、完整代码
import static com.google.mlkit.vision.face.FaceDetectorOptions.PERFORMANCE_MODE_FAST;import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.mlkit.vision.common.InputImage;
import com.google.mlkit.vision.face.Face;
import com.google.mlkit.vision.face.FaceDetection;
import com.google.mlkit.vision.face.FaceDetector;
import com.google.mlkit.vision.face.FaceDetectorOptions;import java.util.List;public class MainActivity extends AppCompatActivity {private ImageView imgView;private Bitmap bitmap;Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);imgView findViewById(R.id.imageView);Button button findViewById(R.id.button);button.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View view) {// 1、配置人脸检测器FaceDetectorOptions faceDetectorOptions new FaceDetectorOptions.Builder().setPerformanceMode(PERFORMANCE_MODE_FAST).build();//2、获取人脸检测器FaceDetector detector FaceDetection.getClient(faceDetectorOptions);// 3、从资源中加载图片bitmap BitmapFactory.decodeResource(getResources(), R.drawable.test3);imgView.setImageBitmap(bitmap);InputImage image InputImage.fromBitmap(bitmap, 0);// 4、处理图片detector.process(image).addOnSuccessListener(new OnSuccessListenerListFace() {Overridepublic void onSuccess(ListFace faces) {Log.e(TAG, onSuccess: 1);imgView.setImageBitmap(drawWithRectangle(faces));}}).addOnFailureListener(new OnFailureListener() {Overridepublic void onFailure(NonNull Exception e) {Notice();}});}});}private void Notice() {Toast.makeText(this, 识别失败, Toast.LENGTH_SHORT);}/**** 为人脸绘制边框** param faces 采集的人脸* return {link Bitmap}*/private Bitmap drawWithRectangle(ListFace faces) {//复制一个新的BitmapBitmap copiedBitmap bitmap.copy(bitmap.getConfig(), true);;for (Face face : faces) {//获取边界状态Rect bounds face.getBoundingBox();// 初始化PaintPaint paint new Paint();// 设置矩形颜色paint.setColor(Color.BLUE);// 设置绘制样式为轮廓绘制paint.setStyle(Paint.Style.STROKE);// 设置为你需要的宽度paint.setStrokeWidth(10);Canvas canvas new Canvas(copiedBitmap);canvas.drawRect(bounds, paint);}return copiedBitmap;}}
在相机中识别也是同样的方法只不过换成相机的视频流。
7、效果展示
