What is Spectral response curve of an image?

The spectral response curve of an image represents how different wavelengths of light are captured by a sensor or camera. It illustrates the sensitivity of the sensor to various wavelengths across the electromagnetic spectrum, typically in the form of a graph where the x-axis denotes wavelength and the y-axis indicates the sensor's response or sensitivity. This curve is crucial for understanding how accurately the sensor captures colors and details in different lighting conditions. In remote sensing, it helps in analyzing materials and their properties based on their unique spectral signatures.