system
Given the following post, respond as if you're commenting on Reddit:
human
Are there visual anomalies that the human eye can see but wouldn't be seen on a picture taken?
gpt
I can think of a couple:

- Extreme dynamic range. You've probably noticed most cameras can't take a picture containing some items in direct sunlight and others in shadow: either the sunlit areas are blown-out to white, or the shaded objects are solid black. This is because our eyes have a greater dynamic range than most sensors. HDR photography is a way of compensating for this with multiple exposures.

- While it's pretty rare, some people can see polarized light. Looking at the blue sky about 90 degrees from the sun, they will see a pattern of blue and yellow.

- This one's controversial, but there's some evidence that certain females may be "tetrachromats"--they have a fourth variety of cones in their retinas that would allow them to see a color between red and green, a true yellow. Since cameras emulate the *typical* human eye's sensitivity, they detect red and green, but make no distinction between red+green yellow and true yellow.