Question

The decorrelation stretch enhances colour differences and removes inter-band __________________.

• A. decorrelation
• B. contradiction
• C. correlation
• D. relationship

Hint:

The decorrelation stretch technique is used to enhance color differences in satellite images by reducing the correlation between bands, making the features more distinguishable.

Answer 1

The Correct Option is C, D

The decorrelation stretch is a technique used in image processing, especially in remote sensing, to enhance the color differences between bands in a multi-band image. It works by transforming the input bands to reduce the correlation between them, which in turn helps to enhance the separation of features in the image. - Option (A): "Decorrelation" is a process that is involved in the decorrelation stretch, but the question is asking what is being removed. The decorrelation stretch removes inter-band correlation, not just "de-correlation". Thus, this statement is not accurate.
- Option (B): "Contradiction" does not relate to the concept of decorrelation stretch, as it is unrelated to image processing techniques. Therefore, this option is incorrect.
- Option (C): "Correlation" is the correct term. The decorrelation stretch removes inter-band correlation, which allows each band to contribute more distinctly to the final image. Therefore, this option is correct.
- Option (D): "Relationship" could also be considered a synonym for correlation in this context, as it refers to the inter-band relationship that is removed by the decorrelation stretch. Therefore, this option is also correct.
Thus, the correct answers are (C) and (D).