Question

Image noise is caused by .........

• A. distortion in satellite altitude
• B. variation in reflectance
• C. change in velocity
• D. limitation in the sensing instrument

Hint:

Always check sensor specifications, as high-quality instruments have noise-reduction features.

Answer 1

The Correct Option is D

In remote sensing and imaging, image noise is defined as random fluctuations or undesirable interference within the captured signal.
A primary source of this noise stems from the inherent constraints of the sensing instrument or sensor.
Noise originates from electronic circuitry, detector flaws, and thermal conditions during data collection.
Although external elements like surface reflectance or satellite motion impact image quality, the noise itself is predominantly a consequence of the sensor's physical and electronic limitations.
Consequently, option (D) accurately pinpoints the origin of image noise.