/// <summary>
/// Extracts an 8-bit image reducing bit depth if necessary
/// </summary>
/// <param name="imageOut">The container to recieve the image</param>
/// <param name="requestedFrame">The framenumber to request</param>
/// <returns>The frame number actually retrieved from the buffer</returns>
public uint Extract(Image8 imageOut, uint requestedFrame)
{
uint frameActual, indexActual;
if (_bytesPerPixel == 2)
{
//this requires acquisition into our internal buffer first
//followed by handing out a downsized copy
frameActual = Extract(_imgDownsize, requestedFrame);
//if our bit-depth is not 16 we have a problem - we need
//to scale our image first to really fill the 16bits otherwise we run into
//problems later...
if (_bitsPerPixel < 16)
{
ip.ippiMulC_16u_C1IRSfs(_scaleFactor, _imgDownsize.Image, _imgDownsize.Stride, _imgDownsize.Size, 0);
}
//we got handed 8 bits
_imgDownsize.ReduceTo8U(imageOut);
}
else
{
NIImaq.CheckError(NIImaq.imgSessionCopyBufferByNumber(_sid, requestedFrame, (IntPtr)imageOut.Image, IMG_OVERWRITE_MODE.IMG_OVERWRITE_GET_NEWEST, out frameActual, out indexActual));
if (frameActual != requestedFrame)
{
System.Diagnostics.Debug.WriteLine("Requested frame {0}; obtained frame {1}", requestedFrame, frameActual);
}
}
_acquiredFrames++;
return(frameActual);
}
/// <summary>
/// Extracts a 16-bit image
/// </summary>
/// <param name="imageOut">The container to recieve the image</param>
/// <param name="requestedFrame">The framenumber to request</param>
/// <returns>The frame number actually retrieved from the buffer</returns>
public uint Extract(Image16 imageOut, uint requestedFrame)
{
uint frameActual, indexActual;
if (_bytesPerPixel == 1)
{
System.Diagnostics.Debug.WriteLine("Acquired 8 bit image into 16bit structure");
}
NIImaq.CheckError(NIImaq.imgSessionCopyBufferByNumber(_sid, requestedFrame, (IntPtr)imageOut.Image, IMG_OVERWRITE_MODE.IMG_OVERWRITE_GET_NEWEST, out frameActual, out indexActual));
if (frameActual != requestedFrame)
{
System.Diagnostics.Debug.WriteLine("Requested frame {0}; obtained frame {1}", requestedFrame, frameActual);
}
_acquiredFrames++;
return(frameActual);
}