capture image for vision processing

Hi,

I want to capture what the robot sees for image processing. The documentation makes it sound easy, but it never says how to do it in a way that I can understand.

I tried this
image = breve.createInstances( breve.Image, 1 )
image.readPixels(0,0)

but this gives me the error
File "/home/jmugan/rcode/robot.py", line 233, in iterate
image.readPixels(0,0)
File "lib/classes/breve/Image.py", line 169, in readPixels
breve.breveInternalFunctionFinder.imageReadPixels( self, self.imageData, x, y )
File "lib/classes/breve/__init__.py", line 144, in __call__
return breveInternal.callInternalFunction( self.function, args )
RuntimeError: invalid type for argument 0 of internal function "imageReadPixels" (got "int", expected "string" )

Any ideas?

Thanks,
Jonathan