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 systems, image noise refers to random variations or unwanted disturbances in the recorded signal.
One of the main causes of image noise is the inherent limitation in the sensing instrument or sensor system.
Electronic circuits, detector imperfections, and thermal conditions contribute to noise during data acquisition.
While external factors like reflectance or satellite movement affect image quality, noise itself is primarily due to the sensor’s physical and electronic limitations.
Therefore, option (D) correctly identifies the cause of image noise.