MAPIR Camera Reflectance Calibration Ground Target Package
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This package contains three ground targets (color cards), each with defined curves (see diagram). The target material has a matte Texture with reflective properties, is close to the Lambertian cal reflection. So it doesn't matter where the sun is in the sky or whether they had started their Work earlier and under different light conditions. To take you before the start of each flight a picture (vertical shooting) of the respective color map(s). It is important to make sure that the color chart is not shaded. The recorded images are used in Post-processing of the calibration for the Pixel values.
The reflective ground targets used Meterial is brand new on the market and was developed by Peau Productions/ MAPIR to be able to achieve even better results at an affordable price. It is high-quality, scratch-resistant quality, not faded or changed over time. The base substrate is durable and evaporated, processed, coated glass in a high vacuum. Measurements were made using several Shimadzu Spectrophotometers and photometers sphere (Ulbricht sphere).
If you like the MAPIR to use Plugin for Fiji (ImageJ) Software, you can select the previously created images of the ground targets. The QR Code is automatically detected, the reflection value is automatically calculated and applied to all pictures, and calibrated. After that you can create with the Software of your choice, the Ortho-mosaic. When using a Raster Calculator for the respective Index, e.g. NDVI, generates the calibrated Index values clean.
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