OpenCV 4 with Python Blueprints - Second Edition

Exploring ways to vary exposure

As we discussed earlier in this chapter, modern Digital Single Lens Reflector cameras (DSLRs), and other digital cameras as well, have a fixed sensor grid (usually placed as a Bayer filter), which just measures the light intensity of the camera.

I bet you have seen the same camera used to capture beautiful night pictures where the water looks like a silky cloud and stills that sports photographers have taken of a player at full stretch. So how can they use the same camera for such different settings and get results that we see on the screen?

When measuring the exposure, it's really hard to measure the luminance that is being captured. It's a lot easier to measure relative speed instead of measuring luminance ...