When asking what is more accurate mirror or camera, it is important for you to realize that there is a difference in how you will appear in both. A mirror shows an inverted image all the time, and a camera records a single image at a specific distance and angle from the object. The camera choice, the lighting, the posture and the facial expression could also impact on the outcome, Visuals Clipping explains, noting that neither method can be entirely objective, but a well-positioned camera with an appropriate focal length might offer a more consistent representation.