Create a DirectShow Filter Graph using the MontiVision Workbench  

The quickest way to create a filter graph is to use the filter graph wizard function from the MontiVision Workbench.

Create a filter graph from the scratch

The MontiVision Workbench starts with an empty project. The first step for creating a filter graph is to select a video source filter and insert it into the graph.

You can now  insert a transform filter from the "Transform Filter" category. You will find the MontiVision Imaging Filter in the "Image Processing" subcategory. .

The next step is to connect the filters. You must connect all of the filters from the source filter to the renderer filter, the source filter sets the media type and parameters for the connection. You must delete all connections if you ever change the the source filter or the parameters and then reconnect the filters. To show the result of the imaging process you can insert a video renderer from the "Renderer" category or you can use the Render Pin  command. The Render Pin command automatically connects the filter graph to a renderer filter. Now you can start the graph. The application opens a new window which displays the result of the image processing.

Sometimes it is necessary to display the raw image as well. To do this, you have to duplicate the video stream after the source filter. The MV Image File Source filter in the example always adds makes a new output pin available if the last free pin was connected. All pins of this filter have the same output. Other source filters do not expose this ability, in which case you will have to insert a tee filter.

To do this, stop the filter graph and insert the Infinite Pin Tee filter. You can find the Infinite Pin Tee filter in the General filter bar in the transform category, subcategory Tee Filter. Remove the connection between the source filter and the first transform filter. Connect the source filter with the input pin from the tee filter. Connect the output pin from the tee filter with the input pin from the transform filter. The last step is to render the new output pin from the tee filter. Start the graph again and a new video window with the original image appears.

If your graph is now complete, you can configure the filter. To do this, select the properties of the filter.

After setting the filter properties, save the filter graph with the Save command. The next step is to create additional filters to further extend the imaging system.