I have one observation and a photo story to share.
I wonder if it is because when we look in a mirror, we are standing but often in a photo we are sitting? Who knows but that thought came to mind.
Years ago I had some film developed and there was a picture of my brother in there. He's older and taller than I am but gosh he looked like a giant in this photo! I finally figured out that my little 5-year-old had taken the picture so the perspective was from down low, making him seem so much taller