How to automatically take photos from Webcam?

[KevinCoder11]

Hi everyone,

the idea is to program a camera which will be used as a bar code reader.

Using the Vision Bar Code Read Function I have managed to take a picture from the webcam, display the image and read the barcode, however I have to take the picture manually.

I would like my camera to be able to automatically take the photo of the barcode when I put a barcode in front of it.

How could I programmatically do this?

Thank you for your support,

KevinCoder

[PeterFoerster · Accepted solution]

Hi Kevin,

by manually, I assume you mean, push a button in LabVIEW, to take an image.

To trigger it with the barcode you could snap and analyze in a loop, until the output makes sense and then continue to process your data. This could be handled beautifully in a state machine.

[KevinCoder11]

 Hi Peter,

indeed, the solution was to continuously scan with a while loop until the barcode was detected, in fact a state machine was a great idea for doing this, thanks for the tipp, now I have a perfectly functional bar code camera,

best regards,

Kevin

[CarlosOtiniano]

In this example, we will create a program in Labview to capture images from a USB camera to your application for further processing using the NI Vision module.

https://decibel.ni.com/content/docs/DOC-30531

[YoolaHer]

Hi, could you send me the source code please, thank you