The MontiVision Mask filter masks out parts of a video stream. The filter is far more flexible than simple ROI operations as it supports elliptical masks in addition to rectangular masks, supports rotated ellipse/rectangle masks and provides options to mask out either a ring, the inner region of the mask or the outer region.
| File: | Mask.ax |
| CLSID: | CLSID_MVMask |
Supported Interfaces
Supported COM Events
The filter supports following events through the IMVFilterEvents interface. Look at the filter events page for more information.
| Event |
Value |
Description |
| MV_ALGORITHM_START_EVENT |
0 |
A filter starts processing a video frame or sample. |
| MV_ALGORITHM_END_EVENT |
1 |
A filter finishes processing a video frame or sample. |
MV Mask Property Page
Uses the IMVMask interface to configure the filter.
| Ellipse/Rectangle | Selects the type of mask to be used. |
| Fill Object | Fill rectangle or ellipse |
| Invert (White Mask) | Inverts the mask |
| X Center | Horizontal Center of the Mask |
| Y Center | Vertical Center of the Mask |
| Width | Mask Width |
| Height | Mask Heigth |
| Angle | Angle of the Mask (Ellipse or Rectangle) |
| Thickness | Thickness of the mask in pixel. |
Sample Configuration
The following sample configuration masks out areas of the video stream. In this case a round piece of plastic has to tested on dirt. The interesting area is masked using MV Mask and processed using MV Convolution and MV Segmentation.
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Original Video from Monochrome Camera:
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Masked Video, only desired Area visible:
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Processed Video, Dirt is visualized:
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