The conversation between human and AI assistant.
Sensors: Why does infrared appear purple in digital cameras?
I'm curious about something related to sensors. Can you explain why infrared appears purple in digital cameras?
Sure. It's because of the way digital camera sensors detect and convert different wavelengths of light. Infrared light has a longer wavelength than visible light, so it has a different effect on the color filter array in the camera sensor. The color filter array is what separates the incoming light into red, green, and blue channels, but when infrared light hits the color filter array, it can leak into neighboring channels and create some unexpected color shifts, like purple.