As the title suggests, I wanted to create a Reflectance map for RGB using Mavic3T images, but I am unable to. Has some done this or have any leads that can help me. Please let me know.
Thank you.
Regads, Kumar Vaibhav
@kumarvaibhavb I confirm that it is not possible to create a true optical reflectance map from standard RGB imagery using PIX4Dmapper.
The primary reason for this limitation is that all RGB cameras apply pre-processing (often proprietary) to generate visually pleasing imagery. This preprocessing means that the original sensor data needed for radiometric accuracy is lost. Because of this, we cannot reliably back-compute the absolute reflectance values required for a true reflectance map. A reflectance map is fundamentally an image where each pixel’s value indicates the scene’s reflectance.
If your primary goal is a high-quality, visually accurate 2D map from your RGB data, we recommend generating an orthomosaic instead. Unlike a reflectance map, the orthomosaic output is designed to be color-balanced to produce a more visually pleasing result and is the appropriate output for RGB projects in PIX4Dmapper.
True reflectance data requires imagery from multispectral sensors, which are designed to capture and retain the necessary radiometric information.
I hope this helps
@Rhea_Garratt , Thank you very much for such a detailed and precise response. It helps a lot and I understand this as a fact and am willing to go with it.
Nonetheless, I still would like to ask a question as a followup to see if there is any alternate possible. So, I have been comparing VI’s across RGB, thermal, multispectral, and hyperspectral, and it would be great if I can have VI’s based on RGB data alone. Do you think I can use VI’s based on DN values from orthomosaics? Please let me know.
Thanks again.