Image sensors and optical devices

What is the noise called that appears the same way at the same positions every time because of pixel-to-pixel variation in characteristics?

  1. AShot noise
  2. BThermal noise
  3. CFixed pattern noise
Show answer and explanation

Answer: C. Fixed pattern noise

Fixed pattern noise appears at the same positions in the same way in every shot because of variations such as pixel amplifier offsets, dark current and column circuits. Because it does not change over time, it can be removed by correlated double sampling and correction processing.

Practice this topic Back to topic

More Image sensors and optical devices questions

  1. How does the size of shot noise, caused by statistical fluctuation in the number of photons, relate to the number of signal electrons N?
  2. What is the main purpose of deep trench isolation (DTI), in which deep trenches filled with insulators are formed between fine pixels?
  3. Which material is suitable for photodiodes that receive light in the 1.55 µm band used in optical fiber communication?
  4. Which correctly describes how a CCD image sensor reads out its signal?
  5. Which is closest to the pixel size of high-resolution image sensors for smartphones?