Android Vision API条形码-将检测区域限制在屏幕中央
我正在我的应用程序中实现条形码扫描仪。我想限制我的探测范围。遵循以下逻辑,但在某些设备中无法正常工作 //尝试裁剪帧的中心部分:Android Vision API条形码-将检测区域限制在屏幕中央,android,barcode-scanner,vision,Android,Barcode Scanner,Vision,我正在我的应用程序中实现条形码扫描仪。我想限制我的探测范围。遵循以下逻辑,但在某些设备中无法正常工作 //尝试裁剪帧的中心部分: public class BoxDetector extends Detector { private Detector mDelegate; private int mBoxWidth, mBoxHeight; public BoxDetector(Detector delegate, int boxWidth, int boxHeigh
public class BoxDetector extends Detector {
private Detector mDelegate;
private int mBoxWidth, mBoxHeight;
public BoxDetector(Detector delegate, int boxWidth, int boxHeight) {
mDelegate = delegate;
mBoxWidth = boxWidth;
mBoxHeight = boxHeight;
}
public SparseArray detect(Frame frame) {
int width = frame.getMetadata().getWidth();
int height = frame.getMetadata().getHeight();
int right = (width / 2) + (mBoxHeight / 2);
int left = (width / 2) - (mBoxHeight / 2);
int bottom = (height / 2) + (mBoxWidth / 2);
int top = (height / 2) - (mBoxWidth / 2);
YuvImage yuvImage = new YuvImage(frame.getGrayscaleImageData().array(), ImageFormat.NV21, width, height, null);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
yuvImage.compressToJpeg(new Rect(left, top, right, bottom), 100, byteArrayOutputStream);
byte[] jpegArray = byteArrayOutputStream.toByteArray();
Bitmap bitmap = BitmapFactory.decodeByteArray(jpegArray, 0, jpegArray.length);
Frame croppedFrame =
new Frame.Builder()
.setBitmap(bitmap)
.setRotation(frame.getMetadata().getRotation())
.build();
return mDelegate.detect(croppedFrame);
}
public boolean isOperational() {
return mDelegate.isOperational();
}
public boolean setFocus(int id) {
return mDelegate.setFocus(id);
}
}
//这是我的条形码检测器构建类:
Detector<Barcode> barcodeDetector = new BoxDetector(new BarcodeDetector.Builder(context).setBarcodeFormats(Barcode.ALL_FORMATS).build(), metrics.widthPixels, metrics.heightPixels);
//BoxDetector myDetector = new BoxDetector(barcodeDetector, metrics.widthPixels, metrics.heightPixels);
BarcodeTrackerFactory barcodeFactory = new BarcodeTrackerFactory(mGraphicOverlay, this);
barcodeDetector.setProcessor(
new MultiProcessor.Builder<>(barcodeFactory).build());
@SuppressWarnings("SuspiciousNameCombination")
CameraSource.Builder builder = new CameraSource.Builder(getApplicationContext(), barcodeDetector)
.setFacing(CameraSource.CAMERA_FACING_BACK)
.setRequestedPreviewSize(metrics.heightPixels, metrics.widthPixels)
.setRequestedFps(30.0f);
Detector barcodeDetector=新的BoxDetector(新的barcodeDetector.Builder(上下文).setBarcodeFormats(条形码.ALL_格式).build(),metrics.widthPixels,metrics.heightPixels);
//BoxDetector myDetector=新的BoxDetector(条码检测器,metrics.widthPixels,metrics.heightPixels);
BarcodeTrackerFactory barcodeFactory=新的BarcodeTrackerFactory(mgraphCoverLay,this);
条形码检测器.setProcessor(
新的MultiProcessor.Builder(barcodeFactory.build());
@SuppressWarnings(“可疑名称组合”)
CameraSource.Builder=新的CameraSource.Builder(getApplicationContext(),barcodeDetector)
.setFacing(摄像机源.摄像机面向后)
.setRequestedPreviewSize(metrics.heightPixels、metrics.widthPixels)
.setRequestedFps(30.0f);
我在哪里,我错过了什么。已引用与此问题相关的所有github线程。但我找不到解决办法。请为此问题提供一些链接或解决方案。BarcodeDetector BarcodeDetector=new BarcodeDetector.Builder(上下文)
BarcodeDetector barcodeDetector = new BarcodeDetector.Builder(context)
.setBarcodeFormats(Barcode.ALL_FORMATS)
.build();
//qrBorder 280dp
DisplayMetrics dm = getResources().getDisplayMetrics();
int height = dm.heightPixels;
int wight = dm.widthPixels;
BoxDetector bx = new BoxDetector(barcodeDetector,pxFromDp(280), height, wight);
BarcodeTrackerFactory barcodeFactory = new BarcodeTrackerFactory(mGraphicOverlay, this);
bx.setProcessor(
new MultiProcessor.Builder<>(barcodeFactory).build());
.setBarcodeFormats(条形码.所有_格式)
.build();
//QRDP
DisplayMetrics dm=getResources().getDisplayMetrics();
int height=dm.heightPixels;
int-wight=dm.width像素;
BoxDetector bx=新的BoxDetector(条形码检测器,PXDP(280),高度,重量);
BarcodeTrackerFactory barcodeFactory=新的BarcodeTrackerFactory(mgraphCoverLay,this);
设置处理器(
新的MultiProcessor.Builder(barcodeFactory.build());
谢谢您的回答!。由于位图有点贵,我使用了聚焦处理器来限制屏幕中央的扫描仪检测。我正在研究相同的问题,所以你找到解决方案了吗?如果是,那么您能帮助我吗?我已经使用DetectionAreaProcessor来限制检测区域。@Madhu您能告诉我您是如何使用DetectionAreaProcessor实现的吗?