Transcript Spectral Discussion

VIRIS
Visible/Infrared Intelligent Spectrometer
TM7 (MIR)
Water Absorption
Cell Structure
TM5 (MIR)
Water Absorption
NIR 3
NIR 1
Leaf
Pigments
Lignin
TM4 (NIR)
Red Edge
TM1 (Blue)
TM2 (Green)
TM3 (Red)
White Pine Spectral Curve
& Landsat Band Regions
Water Content
Cellulose
Red Edge Inflection
Point (REIP)
Relationship Between Chlorophyll Concentration and
REIP Values (Taken From Moss and Rock, 1991)
Chlorophyll Absorption
http://www.chm.bris.ac.uk/motm/chlorophyll/chlorophyll_h.htm
Spectral Indices
Spectral Indices
• REIP – The Red Edge Inflection Point, a strong
indicator of Chlorophyll Content (the higher the
number, the greater the amount);
Spectral Indices
• REIP – The Red Edge Inflection Point, a strong
indicator of Chlorophyll Content (the higher the
number, the greater the amount);
• NDVI – The Normalized Difference Vegetation Index,
an indicator of “Greenness” (the higher the number,
the greener the foliage);
Spectral Indices
• REIP – The Red Edge Inflection Point, a strong
indicator of Chlorophyll Content (the higher the
number, the greater the amount);
• NDVI – The Normalized Difference Vegetation Index,
an indicator of “Greenness” (the higher the number,
the greener the foliage);
• TM 5/4 Ratio – An indicator of Wetness or Dryness
(the higher the number, the drier the foliage);
Spectral Indices
• REIP – The Red Edge Inflection Point, a strong
indicator of Chlorophyll Content (the higher the
number, the greater the amount);
• NDVI – The Normalized Difference Vegetation Index,
an indicator of “Greenness” (the higher the number,
the greener the foliage);
• TM 5/4 Ratio – An indicator of Wetness or Dryness
(the higher the number, the drier the foliage);
• The NIR 3/1 Ratio – An indicator of Seasonal
Development (the higher the number, the older the
foliage).
Chlorotic Mottle
Stomatal Rows
Tree #
Senescent
Healthy
Unhealthy
REIP
697.6
728.5
706.9
NDVI
0.401
0.842
0.825
TM54
0.632
0.499
0.451
NIR31
0.953
0.85
0.781
Tree #
Maple
Oak
Pine1st yr
Pine2nd yr
REIP
728.5
723.9
722.3
720.8
NDVI
0.88
0.897
0.821
0.797
TM54
0.64
0.565
0.475
0.533
NIR31
0.877
0.83
0.813
0.865