^^ Sounds a bit like:
Q: But why?
A: Ask your mother!
http://photographylife.com/dead-vs-stuck-vs-hot-pixels
And:
Quote:
|
Originally Posted by http://kenrockwell.com/tech/hot-pixels/index.htm
Sensors collect photons in microscopic wells, called pixels. Sensors do their magic by assigning electric charges to these photons. These charges are read as analog voltages. These voltages are sampled and quantized to make them into digital values. These digital values go through much more digital processing before we get to see them.
Leakage currents are electric charges which leak into sensor wells. These excess electric charges increase the voltage at the well (pixel) and make it look brighter than it should.
Manufacturing variations will cause some pixels to have much more leakage current than others. It's these few pixels on each sensor which are called "hot."
|
The pixel-scale variations in your camera are unique to
your camera.