real-time image average

[minitest]

Hi All,

I’m trying to realize some real-time image averaging using LabVIEW VDM. The idea is to take a background image (by averaging X images) and then for real-time image averaging we create an array with fixed length for Y last images in order to calculate the sum of those images in a cycle and then divide all this by Y.

I tried to create a VI for this but it doesn't work properly.

Do you have an idea why or how is it possible to realize this algorithm correctly?    

Thank you in advance for your help!

My example is in the attachment.

Gor       

[falkpl]

Images are very different than typical labview wires, they are essentially pointers to memory spaces If you want to do a average of the last Y images, You should preallocate Y image spaces, to store these values and keep track of the index you wish to average.  You can always convert to arrays and treat them like typical labview arrays but this comes at a big performance penalty. 

I would implement the images with a circular buffer approach for keeping track of next image to copy to.