[Mono-dev] Remoting IplImage/Bitmap return type problem

buhochileno at gmail.com buhochileno at gmail.com
Sat Nov 24 18:12:15 EST 2007


I still have my problem about how to get the remoting object picture 
from a client. First I try to make a property and a method to return a 
Bitmap, but finally I only get "some class/type is not marked as 
Serializable...", and now I try to use a IplImage from a basic OpenCv 
implementation that I have for mono based on the SharpCV wrapper (yes, 
the wrapper use IntPtr and DllImport native calls :-S. With my IplImage 
test I allmost succed, in the client side I can make the asignation to a 
local copy of the image, something like this:

CvImage frame = remOrbitKit.Video.LastIplFrame; //-> this is the remote 
object property that return a "CvImage" picture type
..this work...
..but if I later try to show the image the applicatio crash with this:

Unhandled Exception: System.NotSupportedException: Unsupported primitive 
type: System.IntPtr
Server stack trace:
(System.IO.BinaryWriter writer, System.Object value) [0x001b4] in 
(System.IO.BinaryWriter writer, System.Object obj, 
System.Runtime.Remoting.Messaging.Header[] headers, ISurrogateSelector 
surrogateSelector, StreamingContext context, FormatterAssemblyStyle 
assemblyFormat, FormatterTypeStyle typeFormat) [0x00191] in 
(System.IO.Stream serializationStream, System.Object graph, 
System.Runtime.Remoting.Messaging.Header[] headers) [0x00061] in 

I know that this may sound to a specific opencv or image question, but I 
only want to know how can I traslate picture information with remoting, 
I also know that may be this is not recomended due the large amount of 
binary info..but I only need this for test porpuses, so bitmap, mpeg, 
jpg, other streaming approach??.

in advance, thank you very much.


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