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US 10,769,436 B2Granted
Multiband filtering image collection and analysis
AssigneeSentera, Inc.
InventorRyan Lee Nelson
Life of this patent
Estimating the term…
Abstract
An image capture device may capture visible and infrared light, and image analysis may be used to generate a map of the Normalized Difference Vegetation Index (NDVI) of healthy vegetation. Because NDVI data focuses on red and near infrared (NIR) reflectance of plants, NDVI data may be generated using an aircraft-mounted camera with optical filtering to collect various wavelengths. To reduce the size, weight, complexity, and cost of the image analysis system, a multiband optical filter may be used to capture multiple passbands simultaneously.
Claims21
An aerial multispectral imagery system comprising:
- a first multichannel image sensor attached to an aerial vehicle to capture a first multispectral filtered image of a vegetation area;
- a first multiband optical filter attached to the first multichannel image sensor to filter an image of the vegetation area and provide the first multispectral filtered image of the vegetation area to the first multichannel image sensor;
- and
- a processor to;
- generate a first image data set based on the captured first multispectral filtered image, the first image data set including data for a first spectral response curve of a first channel having a first spectral region of interest and data for a second spectral response curve of a second channel having a second spectral region of interest;
- determine, using the first image data set, a first spectral content in the first spectral region of interest by subtracting from a first channel spectral response a percentage of a second channel spectral response within the second spectral region of interest, where the percentage is a ratio of the first channel spectral response and the second channel spectral response within the second spectral region of interest;
- and
- determine, using the first image data set, a second spectral content in the second spectral region of interest by subtracting from the second channel spectral response a percentage of the first channel spectral response within the first spectral region of interest, where the percentage is a ratio of the second channel spectral response and the first channel spectral response within the first spectral region of interest.
5 more elements
A method of aerial multi spectral imagery, comprising:
- capturing a first multispectral filtered image of a vegetation area, the first multispectral filtered image filtered by a first multiband optical filter and captured by a first multichannel image sensor attached to an aerial vehicle;
- generating a first image data set based on the captured first multispectral filtered image, the first image data set including data for a first spectral response curve of a first channel hang a first spectra region of interest and data for a second spectral response curve of a second channel having a second spectral region of interest;
- determining, using the first image data set, a first spectral content in the first spectral region of interest by subtracting from a first channel spectral response a percentage of a second channel spectral response within the second spectral region of interest, where the percentage is a ratio of the first channel spectral response and the second channel spectral response within the second spectral region of interest;
- and
- determining, using the first image data set, a second spectral content in the second spectral region of interest by subtracting from the second channel spectral response a percentage of the first channel spectral response within the first spectral region of interest, where the percentage is a ratio of the second channel spectral response and the first channel spectral response within the first spectral region of interest.
2 more elements
At least one non-transitory machine-readable storage medium, comprising a plurality of instructions that, responsive to being executed with processor circuitry of a computer-controlled device, cause the computer-controlled device to:
- capture a first multispectral filtered image of a vegetation area, the first multispectral filtered image filtered by a first multiband optical filter and captured by a first multichannel image sensor attached to an aerial vehicle;
- generate a first image data set based on the captured first multispectral filtered image, the first image data set including data for a first spectral response curve of a first channel having a first spectral region of interest and data for a second spectral response curve of a second channel having a second spectral region of interest;
- determine, using the first image data set, a first spectral content in the first spectral region of interest by subtracting from a first channel spectral response a percentage of a second channel spectral response within the second spectral region of interest, where the percentage is a ratio of the first channel spectral response and the second channel spectral response within the second spectral region of interest;
- and
- determine, using the first image data set, a second spectral content in the second spectral region of interest by subtracting from the second channel spectral response a percentage of the first channel spectral response within the first spectral region of interest, where the percentage is a ratio of the second channel spectral response and the first channel spectral response within the first spectral region of interest.
2 more elements
Dependencies are inferred from the claim text.