Problem of saturation IMAQ add

I take a series of images of 10 bits, and to increase the effective exposure of the camera I would like to add up to 30 consecutive images.  I am able to add the images using Add IMAQ, but the resulting image is as if it was as a 10-bit image and saturates at 1024 (2 ^ 10).  I don't understand why because the dst of the Image in the IMAQ add is connected to an image I16, and so I expected I'd be able to add my images to 10 bits, until I reached the limit of 16 bits.  I'm new to all this, so it is likely that I do just a stupid mistake.

Currently, I catch N successive frames of the camera using IMAQ Grab, then adds each element of the array resulting to form the new image.

I understand that I could add up to a subset of the images, then divide them by some power of 2, but I'd like to understand why I can't currently use the 16-bit full, image type.

Looks like the acquisition is marking the number of bits of your images to 10 bits. Have you tried to use the depth of Bit Image IMAQ to set the number of bits to 16 bits before adding?

Tags: NI Hardware

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