How can I average images during acquisition with a NI PCI-1407 frame grabber?

[Jan]

I am using a NI PCI-1407 frame grabber to acquire images of a standard video camera. How can I average a user-specified number of images in order to improve the signal-to-noise ratio? Is there a Labview code for this?

[Bob_Y.]

I am not entirely sure what you mean by averaging. To average numbers, you add them together and divide the result by the count of numbers totaled. You can add images together, but I am unsure how you would divide the result by the count of images.

Bob Young

[Diego_M]

Hi Jan,

could you send us more information about your question ???

Regards

Diego M.

[Jorge M.]

Hello,

you can use NI's Vision Module to average images. There's a library of arithmetic operators that allows you to do that on images (pixel to pixel operations such as add, subtract, etc...).

Besides that, another approach could be to use filtering single images (i.e. lowpass) to get a similar effect.

There's an example called Image Averaging Example which shows the first approach.

Regards,

Jorge M.

Mensaje editado por Jorge M.

Mensaje editado por Jorge M.

[Jan]

I have found the averaging example code you mention and got it working.
thanks a lot,
jan

[Jan]

another user already provided me with a solution, an example code to average several images. thanks anyway.

[Jan]

another user already provided me with a solution, an example code to average several images. thanks anyway.

[Ali221]

Hi Jorge,

Actually I want to do the same thing. I will save number of images and I want to average them to get a better resolution. (SNR) But I couldn't find the tool that you said. (Adding, subtracting, etc) Could you please help me about it? I have also attached the Labview code for grabbing images.

Many thanks,

Ali