In the following options, the spectral bands of a remote sensing image are mapped to the colours of the display system. Which one of the following combinations indicates a standard False Colour Composite (FCC)?
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A standard FCC always puts the Near Infrared band on the display's Red channel, which is why healthy vegetation looks bright red in such images.
Step 1: Use a single diagnostic test. Instead of memorising the full convention, use the defining visual signature of a standard FCC: in a standard FCC image, healthy vegetation must appear bright red, because that is the entire reason the composite is used in practice. Step 2: Work out which channel assignment makes vegetation red. Vegetation reflects most strongly in NIR, moderately in Green, and least in Red among the three bands typically composited. For vegetation to render as bright red on the display, the band with the highest vegetation reflectance, NIR, must be sent to the display's Red gun (the strongest signal drives the strongest displayed colour). Step 3: Test each option against this requirement. Option (A): Near Infrared to Red is explicitly stated, satisfying the requirement immediately. Option (B): NIR is sent to Green, not Red, so vegetation would render green-ish, not red, failing the test. Option (C): there is no NIR channel used at all (only B, G, R), so this cannot be an FCC, failing outright. Option (D): NIR is sent to Blue, so vegetation would render blue-ish, failing the test. Step 4: Confirm the rest of option (A) is self-consistent. With NIR fixed at Red, the remaining true-colour bands slot in as Red to Green and Green to Blue, exactly as option (A) states, which mirrors the standard three-band shift (NIR, Red, Green) to (Red, Green, Blue) used industry-wide. Step 5: Conclude. Only option (A) passes the vegetation-appears-red test that defines a standard FCC. \[ \boxed{\text{Option (A) is the standard FCC mapping}} \]
