Android Question Cameraex Class: front camera pictures are very dark

[mitobobo]

Dear,

Pictures took with front camera through Cameraex class are very dark. However, if I use the default Android camera or any other app which takes picture, the pictures are fine. I think it's a problem of exposure, so I tried to add this in the Cameraex class:

Public Sub SetExposureCompensation(Value1 As Int)
  r.target = parameters
  r.RunMethod4("setExposureCompensation", Array As Object(Value1), _
      Array As String("java.lang.int"))
End Sub

and I use this in my activity to set exposure:

camEx.SetExposureCompensation(2)

(I know "2" is a supported value on my phone)

However, nothing changes: picture is still as dark as before

camEx.SetParameter("setExposureCompensation", "2")

doesn't work as well.

Any idea how can I solve it?

Any help would be much much much appreciated! Thanks so much.

 

[Erel]

See this discussion: http://stackoverflow.com/questions/20609011/front-camera-take-very-dark-capture-in-android


WHITE_BALANCE_AUTO = "auto"
SCENE_MODE_AUTO = "auto"

 

[mitobobo]

I'll never stop saying how helpful this forum is! Thank you so much, Erel. I just had to start camera preview and then let the app wait for 2 seconds so that it can adjust while level, I suppose. If you take a photo immediately after the preview is started, the photo will be dark. So a timer is just the solution. Thank you again! Happy Easter.

 

[Erel]

I'm happy that it works. If you can please post the actual code that you are using to configure the camera.

 

[mitobobo]

Nothing hard. I didn't even need to set WHITE_BALANCE_AUTO = "auto" or SCENE_MODE_AUTO = "auto".

camEx.Initialize(pnlContent, frontCamera, Me, "Camera1")

Sub Camera1_Ready (Success As Boolean)
Log("Camera1_Ready?" & Success)
    If Success Then
camEx.StartPreview
Timer1.Initialize("CameraTimer", 2000)
Timer1.Enabled = True

End Sub

Sub CameraTimer_Tick

camEx.TakePicture
Timer1.Enabled = False

End Sub

In my case, a 2 seconds timer is just enough for the camera to auto-balance.