| T O P I C R E V I E W |
| Oribi |
Posted - Jan 21 2014 : 01:39:38
Is it possible to rotate a camera feed (using DirectX) 90 or 270 degrees?
I'm currently using a 5 megapixel camera to capture images which I rotate using the TIEBitmap.Rotate() method after capturing them.
As you can imagine this slows down the capture rate considerable.
Is it possible to have the DirectX layer to perform the rotating instead?
--
Peter
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| 1 L A T E S T R E P L I E S (Newest First) |
| Oribi |
Posted - Jan 29 2014 : 06:21:29
The "Video Processing Project" (http://sourceforge.net/projects/videoprocessing/) contains a Rotate Filter which can be used to rotate images.
When I test this filter using GraphEdt everything works great, however when I add to the filter to the graph created by ImageEn the image appears to be corrupted (it is rotated though).
I currently use the following code to test this:
ImageEn.IO.DShowParams.SetVideoInput(0, 0, w, h, f);
ImageEn.IO.DShowParams.EnableSampleGrabber := true;
ImageEn.IO.DShowParams.Connect;
ImageEn.IO.DShowParams.SaveGraph('y:\graph1.grf');
// Get the Source Output Pin and the input Pin it is connected to
SourceFilter := ImageEn.IO.DShowParams.CurVideoInput;
SrcPinOut := GetPin(SourceFilter, IEPINDIR_OUTPUT);
SrcPinOut.ConnectedTo(DstPinIn);
// Break the existing link
SrcPinOut.Disconnect;
DstPinIn.Disconnect;
// Add the rotate filter
RotateFilter := CreateComObject(CLSID_RotateFilter) as IIEBaseFilter;
ImageEn.IO.DShowParams.Graph.AddFilter(RotateFilter, 'RotateFilter');
// Get the in- and outputpin of the rotate filter
RotateFilterIn := GetPin(RotateFilter, IEPINDIR_INPUT);
RotateFilterOut := GetPin(RotateFilter, IEPINDIR_OUTPUT);
// Place the Rotate Filter between the source
// and the original linked filter
ImageEn.IO.DShowParams.Graph.Connect(SrcPinOut, RotateFilterIn);
ImageEn.IO.DShowParams.Graph.Connect(RotateFilterOut, DstPinIn);
// Rotate 180 degrees
if RotateFilter.QueryInterface(ISettingsInterface, FilterSettings) = S_OK then
FilterSettings.SetParameter('rotationmode', '2');
// Save the new graph (for inspection using GraphEdt)
ImageEn.IO.DShowParams.SaveGraph('y:\graph2.grf');
ImageEn.IO.DShowParams.Run;
Does anyone know what I'm doing wrong?
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