Yes your conversion math is correct. Since it's difficult to determine if the distortion of items in the image is caused by the top-down perspective or the wrap of the wide-angle lens, I have no way of knowing if a distortion needs to be corrected or illustrated. The image is cropped, but in the original frame both the subject and the door are near the center, so they're arguably distorted in comparable amounts. That's why I chose that frame to isolate. The ruler is simply a scale, and since the quality of the footage is poor, a single pixel could mean as much as half an inch in variation. It is by no means "accurate", but it's the best I'm able to do given the image quality. However, at your suggestion, I've included an example scale to the right in the image below. You might be surprised to notice that if you put a scale ruler on a simulated top-down perspective, it means the subject is even taller than my estimates (see A below) over 6'1", and LE's estimates of 5'2'-5'6" slide further down the scale ruler (see B and C below) because of perspective. So more discrepancy (between my estimates and LE's), not less. ...snipped large image from page #60 post #888....