visual calibration

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    Visual calibration: some computer didn't work. What's the Reason?

    I regularly do the visual calibration in my P4P+ drone, however, I found that the assistant 2 didn’t work at all in my new laptop (Dell, I7). No calibration images came out. Next, I tried my old laptop (Asus) connected with a 29 inch monitor, it also didn’t work and no calibration image...