private async Task MakePicture()
{
Title.Text = "Detecting...";
StorageFile filePath = await TakePhoto();
FaceRectangle[] faceRects = await UploadAndDetectFaces(filePath);
Title.Text = String.Format("Detection Finished. {0} face(s) detected", faceRects.Length);
if (faceRects.Length > 0)
{
var maxRes = await USBCam.GetPictureRes();
//move left if face too right and vice versa
// need to have the rectangle centered, in a good proportion
// proportion can be X% left and right of what is left
// only use the first face detected
int fWidth = faceRects[0].Width;
int fLeft = faceRects[0].Left;
int iWidth = (int)maxRes.Width;
double percent = 0.20;
int degreesperRotation = 4;
if ((fLeft < (iWidth * percent)) && ((fLeft + fWidth) < iWidth * (1 - percent)))
{
// 360° = 1 turn of motor = 90° real turn
// using a simple projection for the math
robot.TurnLeft(150, GetAngleToTurn(fLeft, iWidth, percent) * degreesperRotation);
}
else if (((fLeft + fWidth) > (iWidth * (1 - percent))) && (fLeft > (iWidth * percent)))
{
robot.TurnRight(150, GetAngleToTurn(iWidth - (fLeft + fWidth), iWidth, percent) * degreesperRotation);
}
}
}
private async Task <StorageFile> TakePhoto()
{
StorageFile filestr = await USBCam.TakePhotoAsync("picture.jpg");
Debug.WriteLine(string.Format("File name: {0}", filestr.Name));
using (IRandomAccessStream myfileStream = await filestr.OpenAsync(FileAccessMode.Read))
{
WriteableBitmap bitmap = new WriteableBitmap(1, 1);
await bitmap.SetSourceAsync(myfileStream);
FacePhoto.Source = bitmap;
}
return(filestr);
}
private async Task TestCam()
{
StorageFile filestr = await USBCam.TakePhotoAsync("maxime.jpg");
Debug.WriteLine(string.Format("File name: {0}", filestr.Name));
}
