Grabbing frames from a camera and show the output Technische - - PowerPoint PPT Presentation

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OpenTL – Tutorial 1

• Grabbing frames from a camera and show

the output

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HighAPI Input Detector Tracker Output Visual Modalities Model Projection Models CvProcess Core Math

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• Video-File
• USB-Camera
• Firewire Camera

→ in this tutorial we use Guppy firewire cameras from ALLIED vision technologies

Input – Image Sensors

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• Create an instance of a camera:

→ input::FirewireCamera::createFirewireCamera(0)‏

• Open the camera

→ camera->open();

• You can set some features of the camera

→ camera->enableWhiteBalanceAuto(true) → camera->enableGainAuto(true)‏

• Start the frame-grabbing:

→ camera->captureStart()

Firewire Camera

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• Create a camera (as explained before)
• Define a cvdata::Image pointer srcImage
• Create an OpenCV Window:

→ cvNamedWindow("image",1);

• Loop:

→ captureNext() → getImage() → show Image with OpenCV:

cvShowImage("image",srcImage->getIplImage());

• Stop the frame capturing, close the camera

→ stop() → close()

Task – capture from a Firewire camera