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Slope
Slope fits a curve, at each pixel, to how the image changes over a few wavelengths of illumination. The band values are used for the y-axis, and the band wavelengths for the x-axis.
Wavelengths
Slope reads a single multiband image. In “wavelengths”, enter the wavelength of each band in nanometers, one per band. For example, green might be 530.
Curves and outputs
| Curve (“output”) | Bands needed | Parameters you can output |
|---|---|---|
| line | at least 2 | slope, intercept |
| parabola | at least 3 | curvature, center, intercept |
| cubic | at least 4 | curvature, inflection, critical, intercept |
By default (“all”), every parameter is output, one per band, so the output has 2, 3 or 4 bands. Choose a single parameter to output only that one band.
Image at a wavelength
The “format” is parameters by default. Choose image instead to output a single band: the fitted curve's response at the wavelength you enter in “wavelength”. The parameter choices then do not matter.
The output is floating point.
