Image Sensors: When Black turns Red, by Matthias at Teledyne DALSA | Visual Culture and Communication |

Posted by Matthias on November 23, 2012

Image: RGB Sensor Response and Black Body Emission (3500K)


"We have established that emission and absorption spectra are quite important in image sensing.

Why is this so?

First, an image sensor cannot distinguish between wavelengths. All that matters is the number of photons. There are, however, some more subtle effects.

• Color sensors can distinguish wavelengths.
• Different media have different sensitivity to wavelengths, i.e. image sensor A vs. B, human eyes, film… I will discuss some of this in the 4th post in this series.
• Blue photons deliver more energy and have a shallower absorption depth than “red” photons. This will make a difference in a later post on Anti-Blooming and Shutter Efficiency."


Read also:

• Spectral Cognisance Part 1 — Bad Red or True Blue?

• Spectral Cognisance 2 — How White are your Whites?

Via Thierry Saint-Paul