I recently wrote an automated firmware test for a handheld oscilloscope, where I obtain screenshots using its own screenshot feature, then process the images using OCR software.
Now I am requested to port this test to handheld Digital Multimeter. Something that looks like this.
Problem is HHDMM doesn't have a built-in screenshot feature. So I plan to attach a camera on top of the screen to obtain screenshot images. The images must then be automatically retrieved by PC for further processing.
I have no previous experience or knowledge regarding camera selection for this type of purpose. Can anyone educate me about that?