VIRISVIRISVVisible/IInfrarred IIntelligent SSpectrometer

White Pine Spectral Curve White Pine Spectral Curve & Landsat Band Regions& Landsat Band Regions

TM

1 (B

lue)

TM

2 (G

reen

)T

M3

(Red

)

TM

4 (N

IR)

TM

5 (M

IR)

TM

7 (M

IR)

Wat

er A

bso

rpti

on

Wat

er A

bso

rpti

on

Cellulose

Red

Ed

ge

NIR

3NIR

1

Leaf Pigments Cell Structure Water Content

Lig

nin

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).

VIRIS Comaprison of White Pine Health

0

10

20

30

40

50

60

70

80

400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

Wavelength (nm)

% R

efle

ctan

ce

Senescent

Healthy

Unhealthy

© 2003 University of New Hampshire

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

VIRIS Data - ComparisonsConiferous & Deciduous Species

0

10

20

30

40

50

60

70

80

90

100

400 600 800 1000 1200 1400 1600 1800 2000 2200 2400

Wavelength (nm)

% R

efle

ctan

ce Maple

Oak

Pine-1st yr

Pine-2nd yr

© 2003 University of New Hampshire

Tree # Maple Oak Pine-1st yr

Pine-2nd 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

Chlorotic Mottle

Stomatal Rows