Thursday, 19. January 2006, 10:19 Uhr

Trigger a Webcam?

I'd like to continue my video source related discussion. Did you ever use a cheap webcam for your vision task but worried that the camera streams with 30 frames per second whereas you only need an update every second?

There is an alternative to buying the expensive industrial camera: MV Trigger Source.



Place it between your video source and the following video processing filter chain, grab the filters IMVTrigger interface, switch the filter to 'trigger mode' and trigger it whenever you like in order to get an update.

Wednesday, 18. January 2006, 15:46 Uhr

Using Video Capture Sources

We are often told that developer use the actual video capture source filter of their hardware in an MVP file.

This was the right way back in the days when the MontiVision Integration Control was the only available ActiveX control for integration of MontiVision configurations into custom application.

Now that the powerful MontiVision Smart Control is part of the development kit, you shouldn't use the Integration Control for new projects. The Smart Control uses an intelligent way to abstract the capture driver and therefore is hardware independent.

So much for the theory, but how does this work in practice?

The answer is: Use MV Demo Source as dummy video source when creating the MVP file. Give it an unambiguous name like 'Video Source One' by right clicking and renaming MV Demo Source in the Workbench. In your application, replace the dummy by an actual video source using MV VideoSourceComboBox as done in our sample applications included in the installation of the MontiVision Developemnt Kit.

By the way, you do not need to redistribute MV Demo Source with your application if you are using it as a dummy as described above.

Wednesday, 18. January 2006, 09:13 Uhr

Tips and tricks from the MontiVision team

Welcome to our MontiVision weblog, where we will mainly post tips and tricks all around our MontiVision products and technologies.

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We hope you'll like it!

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