Detection of incomplete image with linear camera

[EnricoBeltramo]

What is the goal that you want to achieve by the request? When I use a linear camera, it return always an image with same size (as width x rows configured), either if the image wasn't completely acquired (if fill automatically with blank pixels the not acquired rows). There is a way to understand if an image wasn't completely aquired (i.e some variables inside returend buffer) and to have the number or rows really acquired?

Additional context I'm using a Teledyne DALSA linea lite M4096-7um camera