Grayscale values from 6% to 48*% are the most common selections for nominal lighting conditions. Higher values would be selected for bright lighting conditions. The percentage is selected so images do not appear over- or The neutral grayscale bandĪverage reflectivity of each target ranges from 3% to 82%. Selected by the user will depend upon the pixel sampling needed to Targets rangeįrom 1.2 meters to 20 meters in size. Universities located throughout the world. Including NASA, USDA, DoD, Monsanto and numerous farms and These targets have been sold to a wide range of customers Staking targets insures they lie flat and that they stay in place. Targets may be stakedĭown to the ground through grommets stitched into the targets. In addition, these targets may be used toĬorrelate imaging results obtained from a variety of differentĭurable Type 822 Woven Polyester fabric. Ground Calibration Targets may also be used to help geo-reference TheseĮnable Tetracam systems to compensate for lighting conditions that Standard to provide calibration correction factors. Multispectral Ground Calibration Target may be used as a Placed in theĬamera’s field of view, the known reflectance values of a
Wavelengths monitored by Tetracam cameras. Multispectral Ground Calibration Targets provide a relativelyįlat response to incident radiation throughout the VIS-NIR Representation of the reflected radiation from a given subject Multispectral Ground Calibration Targets help users standardize
Reflected by a subject that are represented in the image willĭiffer from those that would be represented under other more If the multi-spectral imagingįactors into account during image processing, the wavelengths These include properties of the atmosphere, the time of day they Varies with factors that are independent of that subject. Radiation that is reflected from any subject under observation
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