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Taking a picture with a microscope [message #49617]

Wed, 14 March 2018 17:51

Giorgio
Messages: 218
Registered: August 2015

Experienced Member

Hi there,
I searched the forum, but found nothing relevant. I need to create a simple application that shows live the image captured by a digital microscope and when the users click a button save an image. The microscope is a usb digital microscope and it is seen by Linux as a usb-webcam. If someone could point me to the right direction it would be much appreciated.
Regards,
gio

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Re: Taking a picture with a microscope [message #49618 is a reply to message #49617]

Wed, 14 March 2018 20:31

Zbych
Messages: 332
Registered: July 2009

Senior Member

Did you try some existing applications like cheese? https://wiki.gnome.org/Apps/Cheese

The problem is that Upp has no hardware accelerated surface/canvas support.
Event if you get image from camera, you have to use external libraries to show it or you will be limited to very low resolutions and low frame rates.

To get image from camera you can try high level libraries like ZBar, OpenCV.
To show it you can use SDL (SDLCtrl from bazaar), OpenCV, but since DHCtrl is not supported on Gtk backend, you will have to use X11 (NOGTK mode).

Here are some links:
https://github.com/kryali/SmileTime/blob/master/SDL-capture- example.cpp
https://docs.opencv.org/3.0-beta/modules/videoio/doc/reading _and_writing_video.html

[Updated on: Wed, 14 March 2018 20:31]

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Re: Taking a picture with a microscope [message #49619 is a reply to message #49618]

Thu, 15 March 2018 17:43

Giorgio
Messages: 218
Registered: August 2015

Experienced Member

I have tried Cheese (actually, I used it to test the microscope), but the capturing of the image will be just a function in another software and I would like that everything is in one application.

I saw that in examples-bazaar there are two projects - OpenCV and OpenCV_demo - maybe I can use them as a basis.

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