启动预览后，我已将FaceDetection侦听器添加到我的相机中。因此，当面部正在检测时，我正在回调，并且在此基础上，我计算面部区域与预览屏幕的比率。如果百分比较低，则取一些值我会缩放相机。
但问题是，在缩放后面部检测不起作用，没有在FaceDetectionListener上获得回调。
import binascii, re
infile = my_file.bin
with open(infile, "rb") as f:
data = binascii.b2a_hex(f.read()).upper()
for matches in list(data):
match_list = []
matches = re.findall(b'\x24' + b'\x([A-Z]).{3,10}', data)
match_list.append(matches)
}
缩放代码 -
public class FaceDetectionListener implements Camera.FaceDetectionListener {
@Override
public void onFaceDetection( final Camera.Face[] faces, Camera camera ) {
Log.i(TAG, "onFaceDetection " + faces.length);
if ( faces.length > 0 ) {
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
Rect uRect = null;
//Do something after 100ms
for ( int i = 0; i < faces.length; i++ ) {
int left = faces[i].rect.left;
int right = faces[i].rect.right;
int top = faces[i].rect.top;
int bottom = faces[i].rect.bottom;
uRect = new Rect(left, top, right, bottom);
Log.d("FaceDetection", "face detected: " + faces.length +
" Face 1 Location Left: " + left +
" Right: " + right + " Top: " + top + " Bottom: " + bottom + " Area: " + (uRect.height() * uRect.width()));
}
FaceDetect faceDetect = new FaceDetect();
faceDetect.setArea(uRect.height() * uRect.width());
EventBus.getDefault().post(faceDetect);
}
}, 500);
}
}