analyzing the rgb of center point of camera

[tufanv]

Hello guys,

Is there any info or tutorial that we can analyze the color of the center of the camera or a snapshot ?

For example if the center of the picture camera showing is black it will analyze the color and write black to a label ?

Thanks

 

[Erel]

You should use the CameraEx class. Do you want to check the value when a picture is taken or all the time (preview frames)?

 

[tufanv]

i want to check all the time the camera is open Erel

 

[Erel]

See how the preview event is handled in this example: http://www.b4x.com/forum/basic4andr...losed-circuit-tv-cctv-example.html#post136681 (CCTV client).

Once you get the JPEG bytes array you can use:

Dim In As InputStream
In.InitializeFromBytesArray(...)
Dim bmp As Bitmap
bmp.Initialize2(In)
bmp.GetPixel(...)

Make sure not to do it for every frame as it will be too slow.

 

[tufanv]

thank you Erel !