Hey, i need NDVI for my work (in ArcGis and ecognition).Till now, i have always worked with four band digital imagery - but for this work i have three band orthophotos and "three" band near InfraRed orthophotos. All channels together (near InfraRed Ortho) [ATTACH=CONFIG]30975[/ATTACH] just the red channel (InfraRed Ortho) [ATTACH=CONFIG]30976[/ATTACH] My question: which channel should i take for the NDVI calculation? (NIR-Red)/(NIR+RED)? NIR = all three channels together, or just the red one??? Thanks for any help!
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