/**
* 绘制人脸框。
*
*/
private void showFrame(ImageFrame imageFrame, FaceInfo[] faceInfos)
{
Canvas canvas = textureView.LockCanvas();
if (canvas == null)
{
textureView.UnlockCanvasAndPost(canvas);
return;
}
if (faceInfos == null || faceInfos.Length == 0)
{
// 清空canvas
canvas.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
textureView.UnlockCanvasAndPost(canvas);
return;
}
canvas.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
FaceInfo faceInfo = faceInfos[0];
rectF.Set(getFaceRect(faceInfo, imageFrame));
// 检测图片的坐标和显示的坐标不一样，需要转换。
previewView.mapFromOriginalRect(rectF);
float yaw = Math.Abs(faceInfo.HeadPose[0]);
float patch = Math.Abs(faceInfo.HeadPose[1]);
float roll = Math.Abs(faceInfo.HeadPose[2]);
if (yaw > 20 || patch > 20 || roll > 20)
{
// 不符合要求，绘制黄框
paint.Color = Color.Yellow;
String text = "请正视屏幕";
float width = paint.MeasureText(text) + 50;
float x = rectF.CenterX() - width / 2;
paint.Color = Color.Red;
paint.SetStyle(Paint.Style.Fill);
canvas.DrawText(text, x + 25, rectF.Top - 20, paint);
paint.Color = Color.Yellow;
}
else
{
// 符合检测要求，绘制绿框
paint.Color = Color.Green;
}
paint.SetStyle(Paint.Style.Stroke);
// 绘制框
canvas.DrawRect(rectF, paint);
textureView.UnlockCanvasAndPost(canvas);
}
void SetupUserInterface()
{
activity = this.Context as Activity;
view = activity.LayoutInflater.Inflate(Resource.Layout.CameraLayout, this, false);
cameraType = CameraFacing.Back;
textureView = view.FindViewById <TextureView>(Resource.Id.textureView);
textureView.SurfaceTextureListener = this;
OCR_textView = view.FindViewById <TextView>(Resource.Id.myOCR_TextView);
OCR_Rectangle = view.FindViewById <ImageView>(Resource.Id.btn_capture_photo);
OCR_Top_Left = view.FindViewById <ImageView>(Resource.Id.Top_Left_photo);
OCR_Top_Right = view.FindViewById <ImageView>(Resource.Id.Top_Right_photo);
OCR_Bottom_Left = view.FindViewById <ImageView>(Resource.Id.Bottom_Left_photo);
OCR_Bottom_Right = view.FindViewById <ImageView>(Resource.Id.Bottom_Right_photo);
Canvas canvas = textureView.LockCanvas();
Paint paint;
paint = new Paint();
paint.Color = Android.Graphics.Color.Red;
paint.SetStyle(Paint.Style.Stroke);
paint.StrokeWidth = 2f;
Rect r = new Rect((int)100, (int)100, (int)200, (int)200);
// canvas.DrawRect(r, paint);
var absolutePath = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryDcim).AbsolutePath;
if (!Directory.Exists(absolutePath + "/tessdata"))
{
Directory.CreateDirectory(absolutePath + "/tessdata");
}
if (!File.Exists(absolutePath + "/tessdata/eng.traineddata"))
{
string destPath = absolutePath + "/tessdata/eng.traineddata";
using (var source = activity.Assets.Open("eng.traineddata"))
using (var dest = File.OpenWrite(destPath))
source.CopyTo(dest);
}
}
/**
* 绘制人脸框。
*/
private void showFrame2(LivenessModel model)
{
if (camemra1IsRgb)
{
Canvas canvas2 = textureViewOne.LockCanvas();
if (canvas2 == null)
{
textureViewOne.UnlockCanvasAndPost(canvas2);
return;
}
if (model == null)
{
canvas2.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
textureViewOne.UnlockCanvasAndPost(canvas2);
return;
}
FaceInfo[] faceInfos = model.getTrackFaceInfo();
ImageFrame imageFrame = model.getImageFrame();
if (faceInfos == null || faceInfos.Length == 0)
{
// 清空canvas
canvas2.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
textureViewOne.UnlockCanvasAndPost(canvas2);
return;
}
canvas2.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
FaceInfo faceInfo2 = faceInfos[0];
rectF.Set(getFaceRectTwo(faceInfo2, imageFrame));
// 检测图片的坐标和显示的坐标不一样，需要转换。
// mPreview[typeIndex].mapFromOriginalRect(rectF);
float yaw2 = Java.Lang.Math.Abs(faceInfo2.HeadPose[0]);
float patch2 = Java.Lang.Math.Abs(faceInfo2.HeadPose[1]);
float roll2 = Java.Lang.Math.Abs(faceInfo2.HeadPose[2]);
if (yaw2 > 20 || patch2 > 20 || roll2 > 20)
{
// 不符合要求，绘制黄框
paint.Color = (Color.Yellow);
string text = "请正视屏幕";
float width = paint.MeasureText(text) + 50;
float x = rectF.CenterX() - width / 2;
paint.Color = (Color.Red);
paint.SetStyle(Paint.Style.Fill);
canvas2.DrawText(text, x + 25, rectF.Top - 20, paint);
paint.Color = (Color.Yellow);
}
else
{
// 符合检测要求，绘制绿框
paint.Color = (Color.Green);
}
paint.SetStyle(Paint.Style.Stroke);
// 绘制框
canvas2.DrawRect(rectF, paint);
textureViewOne.UnlockCanvasAndPost(canvas2);
Canvas canvas = textureView.LockCanvas();
if (canvas == null)
{
textureView.UnlockCanvasAndPost(canvas);
return;
}
if (faceInfos == null || faceInfos.Length == 0)
{
// 清空canvas
canvas.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
textureView.UnlockCanvasAndPost(canvas);
return;
}
canvas.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
textureView.UnlockCanvasAndPost(canvas);
}
else
{
Canvas canvas = textureView.LockCanvas();
if (canvas == null)
{
textureView.UnlockCanvasAndPost(canvas);
return;
}
if (model == null)
{
// 清空canvas
canvas.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
textureView.UnlockCanvasAndPost(canvas);
return;
}
FaceInfo[] faceInfos = model.getTrackFaceInfo();
ImageFrame imageFrame = model.getImageFrame();
if (faceInfos == null || faceInfos.Length == 0)
{
// 清空canvas
canvas.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
textureView.UnlockCanvasAndPost(canvas);
return;
}
canvas.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
FaceInfo faceInfo = faceInfos[0];
rectF.Set(getFaceRectTwo(faceInfo, imageFrame));
// 检测图片的坐标和显示的坐标不一样，需要转换。
// mPreview[typeIndex].mapFromOriginalRect(rectF);
float yaw = Java.Lang.Math.Abs(faceInfo.HeadPose[0]);
float patch = Java.Lang.Math.Abs(faceInfo.HeadPose[1]);
float roll = Java.Lang.Math.Abs(faceInfo.HeadPose[2]);
if (yaw > 20 || patch > 20 || roll > 20)
{
// 不符合要求，绘制黄框
paint.Color = (Color.Yellow);
string text = "请正视屏幕";
float width = paint.MeasureText(text) + 50;
float x = rectF.CenterX() - width / 2;
paint.Color = (Color.Red);
paint.SetStyle(Paint.Style.Fill);
canvas.DrawText(text, x + 25, rectF.Top - 20, paint);
paint.Color = (Color.Yellow);
}
else
{
// 符合检测要求，绘制绿框
paint.Color = (Color.Green);
}
paint.SetStyle(Paint.Style.Stroke);
// 绘制框
canvas.DrawRect(rectF, paint);
textureView.UnlockCanvasAndPost(canvas);
Canvas canvas2 = textureViewOne.LockCanvas();
if (canvas2 == null)
{
textureViewOne.UnlockCanvasAndPost(canvas2);
return;
}
if (faceInfos == null || faceInfos.Length == 0)
{
// 清空canvas
canvas2.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
textureViewOne.UnlockCanvasAndPost(canvas2);
return;
}
canvas2.DrawColor(Color.Transparent, PorterDuff.Mode.Clear);
textureViewOne.UnlockCanvasAndPost(canvas2);
}
}