WorldView 1 Spectral Indices

The Anthocyanin Reflectance Index (ARI) was developed by Gitelson et al. to non-destructively estimate anthocyanin content in plant leaves. It isolates the anthocyanin absorption peak around 550nm by subtracting the 700nm band that reflects only chlorophyll. ARI is particularly useful for monitoring plant stress, senescence, and physiological status.

The Modified Anthocyanin Reflectance Index (mARI or ARI2) is an enhanced version of ARI that corrects for leaf density and thickness by incorporating a near-infrared band. This modification improves the accuracy of anthocyanin estimation by accounting for leaf scattering properties.

Blue Green Pigment Index (BGI) is a simple ratio index that compares reflectance in the blue (450nm) and green (550nm) regions of the spectrum. It is used to assess plant pigment content, particularly useful for detecting changes in chlorophyll and carotenoid concentrations that affect blue and green light absorption.

The Brightness Index (BI) is a remote sensing index used to assess soil brightness, which is highly correlated with soil moisture, salt content, and organic matter. Developed by Mathieu and Escadafal, it provides valuable information about soil properties and fertility. As brightness increases, soil fertility typically decreases.

The Second Brightness Index (BI2) is an enhanced version of the Brightness Index that includes the near-infrared band in addition to red and green bands. Developed by Escadafal and Huete, it provides improved assessment of soil properties, particularly soil organic carbon content and moisture levels.

A vegetation index that uses blue instead of red bands. BNDVI can be useful in situations where the red band is saturated or when assessing vegetation in water bodies where blue light penetrates better.

Blue Red Pigment Index (BRI) is a simple ratio index that compares reflectance in the blue (450nm) and red (690nm) regions of the spectrum. It is designed to assess plant pigment content and is sensitive to changes in chlorophyll and carotenoid concentrations, making it useful for stress detection and pigment analysis.

A blue-based variant of WDRVI that uses blue instead of red bands. This index maintains sensitivity at high biomass levels while using the blue spectral region, which can be advantageous in certain applications.

Carter1 (Ctr1) is one of the most effective plant stress indices developed by Gregory A. Carter. It uses the ratio of reflectance at 695nm (red-edge) to 420nm (blue) to detect various types of plant stress. This ratio was found to be significantly greater in stressed compared to non-stressed leaves for all stress agents tested.

Carter2 (Ctr2) is a plant stress index that uses the ratio of reflectance at 695nm (red-edge) to 760nm (near-infrared). This index is particularly effective at detecting stress because it combines the stress-sensitive red-edge region with the NIR region where healthy vegetation shows high reflectance.

Carter6 (Ctr6) is a simple ratio vegetation stress index developed by Gregory A. Carter. It uses the ratio of reflectance at 550nm (green) to 420nm (blue) to detect plant stress. The index is based on the principle that stress factors interfere with photosynthesis and alter the reflectance spectrum, particularly in the blue and green regions.

A simple chlorophyll index using the ratio of NIR to red edge reflectance minus 1. This index is sensitive to chlorophyll content variations and is useful for LAI estimation.

Chlorophyll Index RedEdge 710 is a spectral index designed to assess chlorophyll content in vegetation, focusing on the red-edge spectral region. It utilizes the red-edge position to provide sensitive measurements of vegetation chlorophyll status.

The Carotenoid Reflectance Index 550 (CRI550) was developed by Gitelson et al. (2002) to assess carotenoid content in plant leaves. It uses reciprocal reflectance at 510nm (sensitive to carotenoids) and 550nm (to remove chlorophyll effects), providing a non-destructive method for carotenoid estimation.

The Carotenoid Reflectance Index 700 (CRI700) is an alternative formulation to CRI550 that uses the 700nm band instead of 550nm to minimize chlorophyll effects. This index provides better performance in leaves with high chlorophyll content and is particularly useful for mature vegetation.

A vegetation stress index that uses the ratio of reflectance at 605nm to 760nm. This index is sensitive to plant stress conditions and can detect early signs of vegetation health decline.

A vegetation stress index using the ratio of red edge (710nm) to NIR (760nm) reflectance. This index is particularly sensitive to changes in chlorophyll content and plant stress.

Non-linear vegetation index designed for global vegetation monitoring from satellites. Less sensitive to soil background variations compared to NDVI and provides enhanced discrimination of vegetation states.

Color brightness measure representing the total reflectance across visible bands. Used for overall brightness analysis and intensity-based classification.

Enhanced vegetation index that combines simple ratio and NDVI approaches. Provides improved sensitivity to vegetation changes and reduced soil background effects.

An index specifically designed to estimate leaf chlorophyll content using red edge bands. LCI is sensitive to chlorophyll variations while being less affected by leaf structure and canopy architecture.

Vegetation index designed to estimate chlorophyll content with reduced sensitivity to non-photosynthetic vegetation and soil background effects.

Enhanced vegetation chlorophyll index with improved sensitivity and reduced soil background effects. Modified version of MCARI using standard satellite bands.

Advanced vegetation chlorophyll index with enhanced sensitivity and reduced soil background effects. Improved version of MCARI for better leaf area index prediction.

Modified Chlorophyll Absorption Ratio Index 710 is designed to measure chlorophyll content in vegetation. It provides a method to estimate chlorophyll content by comparing reflectance at different wavelengths, particularly in the red and near-infrared regions of the spectrum.

MCARI/MTVI2 is a ratio index that combines the Modified Chlorophyll Absorption Ratio Index (MCARI) with the Modified Triangular Vegetation Index 2 (MTVI2). This combination provides improved sensitivity to leaf chlorophyll content while reducing the influence of leaf area index variations, making it particularly useful for agricultural applications.

MCARI/OSAVI combines the Modified Chlorophyll Absorption Ratio Index (MCARI) with the Optimized Soil-Adjusted Vegetation Index (OSAVI). This ratio index is designed to estimate leaf chlorophyll content while minimizing the confounding effects of leaf area index and soil background reflectance.

MCARI/OSAVI750 is a vegetation index that combines the Modified Chlorophyll Absorption Ratio Index with the Optimized Soil-Adjusted Vegetation Index using red-edge bands. It is specifically designed to estimate chlorophyll content using the 750nm band instead of traditional NIR bands.

Hyperspectral version of MSAVI optimized for precise wavelength bands. Provides enhanced vegetation monitoring with reduced soil background effects.

A modified simple ratio vegetation index optimized for boreal forest applications. It normalizes the difference between NIR and red reflectance, providing improved LAI estimation in forest environments.

Modified Simple Ratio 705,750 is a vegetation index that uses the red-edge spectral region to assess vegetation characteristics, particularly chlorophyll content. It calculates the normalized difference between reflectance at 750nm and 705nm wavelengths.

Enhanced vegetation index combining green, red, and near-infrared reflectance for improved leaf area index estimation and vegetation monitoring.

Advanced triangular vegetation index with enhanced sensitivity to vegetation chlorophyll content and reduced soil background interference.

Non-Homogeneous Feature Difference for urban applications

A vegetation index that uses a nonlinear relationship between NIR and red bands to reduce the saturation effect at high biomass levels. The squared NIR term helps maintain sensitivity to vegetation changes in dense canopies.

Normalized Green for vegetation applications

Normalized NIR for vegetation applications

Normalized Red for vegetation applications

OSAVI2 is a variant of the Optimized Soil Adjusted Vegetation Index that uses red-edge bands (750nm and 705nm) instead of traditional NIR and red bands. This modification improves sensitivity to vegetation changes while maintaining the soil brightness correction factor of 0.16, making it particularly effective for vegetation monitoring in areas with variable soil backgrounds.

Oil Spill Index for water applications

Plastic Index for water applications

Perpendicular Impervious Surface Index for urban applications

The Photochemical Reflectance Index (PRI) was developed by Gamon, Penuelas, and Field (1992) to track diurnal changes in photosynthetic efficiency. PRI detects changes in xanthophyll cycle pigments that occur during plant stress, providing a measure of light use efficiency and general ecosystem health through remote sensing.

Plant Senescence Reflectance Index (PSRI) is designed to detect plant stress and senescence by measuring the ratio of carotenoid to chlorophyll pigments. It is sensitive to changes in leaf pigments that occur during plant aging, stress, or fruit ripening, making it useful for monitoring crop maturity and health status.

Red Chromatic Coordinate for vegetation applications

An index that calculates the red edge inflection point, which is the wavelength of maximum slope in the red edge region. REIP is sensitive to chlorophyll content and vegetation stress.

A variant of the red edge inflection point calculation using slightly different wavelengths. This index provides an alternative measurement of the red edge position for chlorophyll assessment.

A normalized difference vegetation index using red edge bands instead of traditional red and NIR. This index is particularly sensitive to chlorophyll content and vegetation stress.

Red-Edge Position Linear Interpolation (REP) is a spectral index that detects the red-edge position through linear interpolation. The red-edge position is a key indicator of vegetation health, chlorophyll content, and plant stress, representing the inflection point between red absorption and NIR reflectance.

Red Green Blue Vegetation Index for vegetation applications

SPOT HRV XS-based Redness Index 4 for soil applications

A spectral index that calculates the color saturation by comparing the maximum and minimum RGB values. Used for analyzing vegetation characteristics and spectral indices for degradation of natural environments.

Soil-Adjusted Vegetation Index 2 for vegetation applications

Soil-Adjusted Vegetation Index Thermal for burn applications

Sentinel-2 LAI Green Index for vegetation applications

Shadow Index for vegetation applications

The Structure Insensitive Pigment Index (SIPI) was developed by Peñuelas et al. (1995) to assess the ratio of carotenoids to chlorophyll-a while minimizing the effects of canopy structure variation. SIPI is particularly useful for detecting plant stress and senescence, as chlorophylls tend to decline more rapidly than carotenoids under stress conditions.

Simple Ratio (860, 550 and 708 nm) for vegetation applications

An index designed to estimate vegetation chlorophyll content while minimizing the effects of leaf area index. TCARI is particularly useful for precision agriculture and crop health monitoring.

TCARI/OSAVI is a combined vegetation index that integrates the Transformed Chlorophyll Absorption in Reflectance Index (TCARI) with the Optimized Soil-Adjusted Vegetation Index (OSAVI). It is designed for accurate estimation of crop chlorophyll content while minimizing the effects of soil background and leaf area index variations.

TCARI/OSAVI 705,750 is a modified version of the TCARI/OSAVI index that uses the red-edge bands at 705nm and 750nm instead of traditional red and NIR bands. This modification improves sensitivity to chlorophyll content estimation while reducing the influence of leaf area index and soil background.

A vegetation index designed to minimize soil brightness effects on vegetation measurements. TSAVI requires knowledge of the soil line parameters (slope and intercept) for optimal performance.

A simple transformation of NDVI that shifts values to avoid negative numbers. TVI ranges from 0 to 1, making it easier to interpret and use in some applications.

The Triangular Vegetation Index (TVI) was developed by Broge and Hansen (2000) based on the triangular area formed by green peak, near-infrared shoulder, and chlorophyll absorption minimum. TVI is sensitive to both chlorophyll content and LAI, capturing radiative energy absorbed by pigments and providing improved retrieval accuracy with reduced saturation effects.

A vegetation index that uses the triangular area formed by green, red, and red-edge reflectance values. It is sensitive to leaf chlorophyll content and is particularly useful for estimating green LAI.

Visible Atmospherically Resistant Index (700 nm) - A spectral index for vegetation applications.

A red edge variant of VARI that uses red edge bands instead of green. This index is designed to estimate vegetation fraction with reduced atmospheric effects.

The Visible Atmospherically Resistant Index (VARI) is designed to emphasize vegetation in the visible portion of the spectrum while mitigating illumination differences and atmospheric effects. It evaluates the 'greenness' in plants using only visible light bands, making it ideal for standard RGB cameras without requiring specialized multispectral sensors.

VI6T Index - A spectral index for burn applications.

A hyperspectral vegetation index that uses the red edge spectral region to assess vegetation health and chlorophyll content. It is particularly sensitive to vegetation stress and early detection of plant diseases.

A vegetation index that uses specific red edge wavelengths to assess vegetation health and chlorophyll content. It is sensitive to changes in leaf internal structure and chlorophyll concentration.

A simple ratio vegetation index using red edge wavelengths to assess vegetation health and chlorophyll content. The ratio of 715nm to 705nm provides information about the red edge position and slope.

A vegetation index designed to improve sensitivity for moderate to high biomass conditions where traditional NDVI saturates. The weighting factor (0.1) enhances the dynamic range of the vegetation signal.

A vegetation index that accounts for soil background by using a weighted difference between NIR and red bands. The weight parameter 'a' is the slope of the soil line, typically derived from bare soil measurements.