本文介紹了在android中使用人臉檢測裁剪圖像的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！
問題描述
我需要一個可以使用人臉檢測功能裁剪任何圖像的演示.
I needed a demo where any image can be cropped with the face detection function.
已修復
但是經過幾個小時的沖浪后，我一個演示都沒有，所以我準備了一個演示，并結合了我在網上找到的幾個演示.
But after few surfing hours I didn't come to a single demo, so I prepared a single demo with conjunction of few demos that I found online.
我已經準備了一個演示來裁剪圖像.
I have prepared a demo to crop the image.
我的演示裁剪了圖像矩形和圓形.
My demo crops the image rectangle, and circular as well.
它還檢測人臉并根據人臉檢測裁剪圖像.
Also it detects the face and crops the image according to the face detection.
我正在使用下面的圖片來裁剪它.
I am using the following image to crop it.
裁剪結果的截圖是:
示例的xml是:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
tools:context=".MainActivity" >
<View
android:id="@+id/part1"
android:layout_width="fill_parent"
android:layout_height="100dp" >
</View>
<View
android:id="@+id/part2"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginTop="30dp" >
</View>
</LinearLayout>
Activity的java代碼:
The java code for the Activity :
public class MainActivity extends Activity {
public View part1, part2;
int viewHeight, viewWidth;
private FaceDetector myFaceDetect;
private FaceDetector.Face[] myFace;
float myEyesDistance;
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
part1 = findViewById(R.id.part1);
part2 = findViewById(R.id.part2);
part1.post(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
viewHeight = part1.getMeasuredHeight();
viewWidth = part1.getMeasuredWidth();
try {
Paint paint = new Paint();
paint.setFilterBitmap(true);
Bitmap bitmapOrg = BitmapFactory.decodeResource(
getResources(),
R.drawable.sachin_tendulkar_10102013);
int targetWidth = bitmapOrg.getWidth();
int targetHeight = bitmapOrg.getHeight();
Bitmap targetBitmap = Bitmap.createBitmap(targetWidth,
targetHeight, Bitmap.Config.ARGB_8888);
RectF rectf = new RectF(0, 0, viewWidth, viewHeight);
Canvas canvas = new Canvas(targetBitmap);
Path path = new Path();
path.addRect(rectf, Path.Direction.CW);
canvas.clipPath(path);
canvas.drawBitmap(
bitmapOrg,
new Rect(0, 0, bitmapOrg.getWidth(), bitmapOrg
.getHeight()), new Rect(0, 0, targetWidth,
targetHeight), paint);
Matrix matrix = new Matrix();
matrix.postScale(1f, 1f);
BitmapFactory.Options bitmapFatoryOptions = new BitmapFactory.Options();
bitmapFatoryOptions.inPreferredConfig = Bitmap.Config.RGB_565;
bitmapOrg = BitmapFactory.decodeResource(getResources(),
R.drawable.sachin_tendulkar_10102013,
bitmapFatoryOptions);
myFace = new FaceDetector.Face[5];
myFaceDetect = new FaceDetector(targetWidth, targetHeight,
5);
int numberOfFaceDetected = myFaceDetect.findFaces(
bitmapOrg, myFace);
Bitmap resizedBitmap = null;
if (numberOfFaceDetected > 0) {
PointF myMidPoint = null;
Face face = myFace[0];
myMidPoint = new PointF();
face.getMidPoint(myMidPoint);
myEyesDistance = face.eyesDistance();
if (myMidPoint.x + viewWidth > targetWidth) {
while (myMidPoint.x + viewWidth > targetWidth) {
myMidPoint.x--;
}
}
if (myMidPoint.y + viewHeight > targetHeight) {
while (myMidPoint.y + viewHeight > targetHeight) {
myMidPoint.y--;
}
}
resizedBitmap = Bitmap.createBitmap(bitmapOrg,
(int) (myMidPoint.x - myEyesDistance),
(int) (myMidPoint.y - myEyesDistance),
viewWidth, viewHeight, matrix, true);
} else {
resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
viewWidth, viewHeight, matrix, true);
}
/* convert Bitmap to resource */
// Bitmap resizedBitmap = Bitmap.createBitmap(targetBitmap,
// 0,
// 0, viewWidth, viewHeight, matrix, true);
BitmapDrawable bd = new BitmapDrawable(resizedBitmap);
part1.setBackgroundDrawable(bd);
} catch (Exception e) {
System.out.println("Error1 : " + e.getMessage()
+ e.toString());
}
}
});
part2.post(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
viewHeight = part2.getMeasuredHeight();
viewWidth = part2.getMeasuredWidth();
try {
Paint paint = new Paint();
paint.setFilterBitmap(true);
Bitmap bitmapOrg = BitmapFactory.decodeResource(
getResources(),
R.drawable.sachin_tendulkar_10102013);
int targetWidth = bitmapOrg.getWidth();
int targetHeight = bitmapOrg.getHeight();
Bitmap targetBitmap = Bitmap.createBitmap(targetWidth,
targetHeight, Bitmap.Config.ARGB_8888);
RectF rectf = new RectF(0, 0, viewWidth, viewHeight);
Canvas canvas = new Canvas(targetBitmap);
Path path = new Path();
path.addRect(rectf, Path.Direction.CW);
canvas.clipPath(path);
canvas.drawBitmap(
bitmapOrg,
new Rect(0, 0, bitmapOrg.getWidth(), bitmapOrg
.getHeight()), new Rect(0, 0, targetWidth,
targetHeight), paint);
Matrix matrix = new Matrix();
matrix.postScale(1f, 1f);
BitmapFactory.Options bitmapFatoryOptions = new BitmapFactory.Options();
bitmapFatoryOptions.inPreferredConfig = Bitmap.Config.RGB_565;
bitmapOrg = BitmapFactory.decodeResource(getResources(),
R.drawable.sachin_tendulkar_10102013,
bitmapFatoryOptions);
myFace = new FaceDetector.Face[5];
myFaceDetect = new FaceDetector(targetWidth, targetHeight,
5);
int numberOfFaceDetected = myFaceDetect.findFaces(
bitmapOrg, myFace);
Bitmap resizedBitmap = null;
if (numberOfFaceDetected > 0) {
PointF myMidPoint = null;
Face face = myFace[0];
myMidPoint = new PointF();
face.getMidPoint(myMidPoint);
myEyesDistance = face.eyesDistance() + 20;
if (myMidPoint.x + viewWidth > targetWidth) {
while (myMidPoint.x + viewWidth > targetWidth) {
myMidPoint.x--;
}
}
if (myMidPoint.y + viewHeight > targetHeight) {
while (myMidPoint.y + viewHeight > targetHeight) {
myMidPoint.y--;
}
}
resizedBitmap = Bitmap.createBitmap(bitmapOrg,
(int) (myMidPoint.x - myEyesDistance),
(int) (myMidPoint.y - myEyesDistance),
viewWidth, viewHeight, matrix, true);
} else {
resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
viewWidth, viewHeight, matrix, true);
}
/* convert Bitmap to resource */
// Bitmap resizedBitmap = Bitmap.createBitmap(targetBitmap,
// 0,
// 0, viewWidth, viewHeight, matrix, true);
BitmapDrawable bd = new BitmapDrawable(resizedBitmap);
part2.setBackgroundDrawable(new BitmapDrawable(
getCroppedBitmap(bd.getBitmap())));
} catch (Exception e) {
System.out.println("Error1 : " + e.getMessage()
+ e.toString());
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public Bitmap getCroppedBitmap(Bitmap bitmap) {
// Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
// bitmap.getHeight(), Config.ARGB_8888);
// Canvas canvas = new Canvas(output);
//
// final int color = 0xff424242;
// final Paint paint = new Paint();
// final Rect rect = new Rect(0, 0, bitmap.getWidth(),
// bitmap.getHeight());
//
// paint.setAntiAlias(true);
// canvas.drawARGB(0, 0, 0, 0);
// paint.setColor(color);
// // canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
// canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2,
// bitmap.getWidth() / 2, paint);
// paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
// canvas.drawBitmap(bitmap, rect, rect, paint);
// // Bitmap _bmp = Bitmap.createScaledBitmap(output, 60, 60, false);
// // return _bmp;
// return output;
int targetWidth = bitmap.getWidth();
int targetHeight = bitmap.getHeight();
Bitmap targetBitmap = Bitmap.createBitmap(targetWidth, targetHeight,
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(targetBitmap);
Path path = new Path();
path.addCircle(((float) targetWidth - 1) / 2,
((float) targetHeight - 1) / 2,
(Math.min(((float) targetWidth), ((float) targetHeight)) / 2),
Path.Direction.CCW);
canvas.clipPath(path);
Bitmap sourceBitmap = bitmap;
canvas.drawBitmap(sourceBitmap, new Rect(0, 0, sourceBitmap.getWidth(),
sourceBitmap.getHeight()), new Rect(0, 0, targetWidth,
targetHeight), null);
return targetBitmap;
}
}
推薦答案
該演示適用于drawable文件夾中的任何圖像，
The demo works for any image put in the drawable folder,
但是，如果您想裁剪任何動態圖像，例如從圖庫中下載或選擇的任何圖像，只需對代碼進行一些更改:
But if you want to crop any dynamic image, for example any image which is downloaded or chosen from gallery, make few changes in the code :
看線:
Bitmap bitmapOrg = BitmapFactory.decodeResource(
getResources(),
R.drawable.sachin_tendulkar_10102013);
這里我從可繪制文件夾中獲取圖像，現在對于任何下載的圖像，您只需將該圖像保存在 bitmapOrg 變量中，因此只需將上面的行更改兩次，part1 用于矩形，part2 用于 ciculart將下載的圖片作為位圖保存到 bitmapOrg，并使用演示，它將以矩形和圓形方式裁剪您的圖像.
Here I am taking the image from the drawable folder, now for any downloaded image, you just need to save that image in the bitmapOrg variable, so just change the above line twice, one for part1 for rectangle and part2 for ciculart with your downloaded image saving to bitmapOrg as bitmap, and use the demo, it will crop your image in rectangle and circular way.
這篇關于在android中使用人臉檢測裁剪圖像的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！
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