With that additional requirement, consider the following naive 2-camera solution flow: 1. load packet contents on transparent substrate 2. short vibration to r

With that additional requirement, consider the following naive 2-camera solution flow: 1. load packet contents on transparent substrate 2. short vibration to randomly disperse 3. image capture top and bottom 4. ML processing 5. dispose of load 6. goto step (1) Cameras for this class of application are cheap, but if 1 camera is an explicit design requirement, then a simple motor with 90-degree camera mount to capture top, rotate 180-deg, capture bottom is simple enough as well (albeit less reliable given the introduction of a precision electromotive element to the system). If alignment is critical, then error budget can be appreciably extended by marking corners of transparent rectangular platter with distinct color/shape on top and bottom to serve as fiducials in computer-aided skew correction/alignment, compensating for inevitable drift over time; it could also supplement human validation of archived images so orientation is easily determined.