Emgu CV Library Documentation
cvGetRawData Method (arr, data, step, roi_size)
NamespacesEmgu.CVCvInvokecvGetRawData(IntPtr, IntPtr%, Int32%, MCvSize%)

www.emgu.com/wiki
Fills output variables with low-level information about the array data. All output parameters are optional, so some of the pointers may be set to NULL. If the array is IplImage with ROI set, parameters of ROI are returned.
Declaration Syntax
C#Visual BasicVisual C++
public static void cvGetRawData(
	IntPtr arr,
	out IntPtr data,
	out int step,
	out MCvSize roi_size
)
Public Shared Sub cvGetRawData ( _
	arr As IntPtr, _
	<OutAttribute> ByRef data As IntPtr, _
	<OutAttribute> ByRef step As Integer, _
	<OutAttribute> ByRef roi_size As MCvSize _
)
public:
static void cvGetRawData(
	IntPtr arr, 
	[OutAttribute] IntPtr% data, 
	[OutAttribute] int% step, 
	[OutAttribute] MCvSize% roi_size
)
Parameters
arr (IntPtr)
Array header
data ( IntPtr %)
Output pointer to the whole image origin or ROI origin if ROI is set
step ( Int32 %)
Output full row length in bytes
roi_size ( MCvSize %)
Output ROI size

Assembly: Emgu.CV (Module: Emgu.CV) Version: 1.3.0.0 (1.3.0.0)