So the basics of this variant of the CamEx class is I added some error handling, so that subs called before the camera is ready won't crash the program. And you can be sure you're actually getting data by checking CamEx.CameraIsReady.
CommitParameters is called automatically in a few places, and the Panel is made visible automatically to prevent some annoying bug hunts I ran into.
I merged some really helpful stuff like PreviewImageToJpeg, PreviewImageToBMP, and BytesToBmp (converts preview bytes directly to a BMP without writing to a file)
But the biggest feature is the Face Detection. We've had the functions before, but Android uses a (deliberately?) obfuscated coordinate system that:
-is not what the documentation claims (-1000 to 1000)
-varies wildly between different devices (Xperia devices start at 0 instead of -1000)
-varies wildly between different orientations (you can't even apply simple math to rotate it yourself)
So I came up with a method that automatically calibrates the coordinate system, and saves it to to the Android folder (so every program using this code can use the same settings file) only when the data is changed, when you shut the camera down.
Basically, all the user has to do is move their face into each of the 4 corners, for each of the device's orientations. This step isn't required as it'll naturally calibrate over time, but this speeds up the process.
I don't have access to the eye/mouth coordinates yet, as Google's documentation on that is also wrong.
The usage is roughly the same as the existing CamEx class.
EDIT: Points removed
CommitParameters is called automatically in a few places, and the Panel is made visible automatically to prevent some annoying bug hunts I ran into.
I merged some really helpful stuff like PreviewImageToJpeg, PreviewImageToBMP, and BytesToBmp (converts preview bytes directly to a BMP without writing to a file)
But the biggest feature is the Face Detection. We've had the functions before, but Android uses a (deliberately?) obfuscated coordinate system that:
-is not what the documentation claims (-1000 to 1000)
-varies wildly between different devices (Xperia devices start at 0 instead of -1000)
-varies wildly between different orientations (you can't even apply simple math to rotate it yourself)
So I came up with a method that automatically calibrates the coordinate system, and saves it to to the Android folder (so every program using this code can use the same settings file) only when the data is changed, when you shut the camera down.
Basically, all the user has to do is move their face into each of the 4 corners, for each of the device's orientations. This step isn't required as it'll naturally calibrate over time, but this speeds up the process.
I don't have access to the eye/mouth coordinates yet, as Google's documentation on that is also wrong.
The usage is roughly the same as the existing CamEx class.
B4X:
Sub camera_Ready (Success As Boolean)
Log("CAMERA IS " & IIF(Success, "READY", "NOT READY"))
If Success Then
Log("ACLpanel: " & ACLpanel.Visible & " @ " & ACLpanel.Top & "," & ACLpanel.Left & " - " & ACLpanel.Width & "x" & ACLpanel.Height)
If camEx.IsInitialized Then
Try
camEx.StartPreview
camEx.StartFaceDetection 'This will start face detection, if it's supported
'If Graphics.ColorEffect.Length>0 Then camEx.SetColorEffect2(Graphics.ColorEffect)
Catch
camera_Ready(False)
End Try
End If
End If
End Sub
Sub camera_FaceDetected(Face As Face)
Log("FACE: X=" & Face.Location.Left & ", Y=" & Face.Location.Top & ", W=" & Face.Location.Width & ", H=" & Face.Location.Height)
End Sub
'picwidth/height is the size of the image itself (src, before)
'thumbwidth/height is the desired/maximum dimensions (dest, after)
'forcefit expands smaller images to fit picwidth/height while retaining the aspect ratio (ie: letterboxing/pillarboxing)
'forcefull expands smaller images to fill the entire picwidth/height leaving no border, destroying the aspect ratio
Sub Thumbsize(PicWidth As Int, PicHeight As Int, thumbwidth As Int, thumbheight As Int, ForceFit As Boolean, ForceFull As Boolean)As Point
Dim Temp As Point
Temp.X=PicWidth
Temp.Y=PicHeight
If ForceFit Then
If Temp.Y < thumbheight Then
Temp.X = Temp.X * thumbheight / Temp.Y
Temp.Y = thumbheight
End If
End If
If Temp.X > thumbwidth Then
Temp.Y = Temp.Y / (Temp.X / thumbwidth)
Temp.X = thumbwidth
End If
If Temp.Y > thumbheight Then
Temp.X = Temp.X / (Temp.Y / thumbheight)
Temp.Y = Temp.Y / (Temp.Y / thumbheight)
End If
If ForceFull Then
If Temp.X < thumbwidth Then
Temp.Y = Temp.Y * (thumbwidth / Temp.X)
Temp.X = thumbwidth
End If
If Temp.Y < thumbheight Then
Temp.X = Temp.X * (thumbheight / Temp.Y)
Temp.Y = Temp.Y * (thumbheight / Temp.Y)
End If
End If
Return Temp
End Sub
Sub IIF(Value As Boolean , IFtrue, IfFalse)
If Value Then Return IFtrue
Return IfFalse
End SubEDIT: Points removed
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