Which statement about emissivity and reflected temperature is true in infrared image analysis?

• A. Emissivity and reflected temperature can be adjusted after saving
• B. They cannot be adjusted
• C. Only emissivity can be adjusted
• D. Only reflected temperature can be adjusted

Answer: (A)

In infrared image analysis, turning the measured radiance into a temperature relies on two inputs: the surface emissivity and the reflected ambient temperature. The sensor sees a mix of the surface’s own emission and radiation reflected from the surroundings, and this calculation depends on the exact emissivity value and the temperature of what’s reflected. Most analysis tools allow you to adjust these parameters after saving the image, then recompute the temperatures. This flexibility is important because the true emissivity of a surface and the ambient reflected temperature can be uncertain at capture time, and updating them lets you refine the temperature estimates using the radiometric equation. So, changing both emissivity and reflected temperature after saving to rederive temperatures is the correct concept.