Here's your template!

@today automatically stamps your notes with today's date. Fill in the topic of the lecture or class. Then use the Cornell Notes structure below. Click the + New Notes button above to automatically generate a fresh set of notes in this format.

Date: October 5, 2019

Topic:

Recall

Resolution

Noise

Photon Shot Noise

Read Noise

Quantization Noise

Dark Current Noise (thermal 热量的)

Fixed Pattern Noise (Defective Pixels)

Dynamic Range

Notes

Unwanted modification of signal during capture, conversion, transmission, processing, and even storage.

• Photon Shot Noise (Scene Dependent)
  • Quantum nature of light
  • Random arrival of photons
• Readout Noise (Scene Independent)
  • Electronic Noise: pre-analog-to-digital conversion
  • Quantization Noise: post analog-to-digital conversion
• Other sources (Scene Independent)
  • Dark Current Noise: Thermally generated photons
  • Fixed Pattern Noise: Defective pixels

Model it with Poisson Distribution

Modeled as Gaussian Distribution

• This conversion noise has nothing to do with the actual mean value you want to measure.

some electrons are released because of the temperature itself.

cooling can help when shoot long exposure images.

Can be reduced by Dark Frame Subtraction.

ratio of maximum photon energy to minimum detectable energy. (above the level of noise)