How to change the focus setting of the camera?

Dear all,

I have an Allied Vision GT4096 that I want to connect to Matlab. The distance between the lens and the target is known and will vary between 0.5meters and 30meters during the image acquisition. I would like to adapt the focus setting as a function of the distance between the lens and the target. Which toolbox should I use to do so and by how ?

To clarify a bit more, I would like to measure the level of focus of the image to verify whether the image is sharp. If the image is not sharp, then I would like to change the focus of the lens. Long story short, I would like to have an autofocus on my camera that run continuously.

Many thanks for your help,

Antoine L.

Answer 1

[Prashanth Ramesh]

Hi Antonie,

I believe Allied Vision GT4096 is GigE Vision Compliant. You would be able to acquire images using the Image Acquisition Toolbox. https://www.mathworks.com/help/imaq/acquisition-using-gige-vision-hardware.html

Based on the device, you could modify different properties. While I am not sure about the particular hardware mentioned, most cameras support auto-focus as described at the end of the following link:

https://www.mathworks.com/help/imaq/set-properties-for-gige-acquisition.html#buiqdyc

You may find the following links useful:

i. Advanced Properties

ii. Examples using Image Acquisiotn

iii. Implementing a manual algorithm for focus measure