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Topics - juacarri

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1
General / Assign RGB to a multispectral point cloud
« on: October 14, 2020, 03:44:18 PM »
Hi! I'm trying to create a point cloud from images taken with a Micasense RedEdge camera, but once I perform the radiometric calibration, the RGB colors in the point cloud are modified to a false color. Do you know how to fix this?

I don't know if it is related with this issue, but if I export the dense point cloud normalized (applying the B1/32768 and so on formulas in the raster transform), the color values for the points are very low:


        X                            Y                      Z              blue      green          red         redEdge    IR
729012.768169 4393739.324077 227.843895 0.105255 0.149109 0.048462 0.243195 0.202972
729012.612752 4393738.960428 227.977216 0.061981 0.095306 0.028412 0.182037 0.185944
729012.839116 4393738.558298 227.977531 0.063629 0.097778 0.030914 0.183228 0.170929
729012.733558 4393738.435439 227.986485 0.064087 0.092926 0.031097 0.170258 0.168488
729012.144106 4393738.849464 227.941197 0.096130 0.146027 0.049622 0.236603 0.202454
729012.082371 4393737.394998 228.054853 0.112457 0.158722 0.048279 0.233826 0.188354
729012.310966 4393737.410769 228.049419 0.111267 0.162079 0.050140 0.243866 0.201782

Point cloud exported and visualized in CloudCompare:



2
Camera Calibration / Radiometric calibration before point cloud export
« on: October 17, 2019, 11:05:50 AM »
Hello, I'm working with the images from a Micasense RedEdge and I have a question about the workflow. Currently I'm doing the radiometric calibration as first step of the process, later I align the photos and immediately I densify the point cloud.

After the densification, I export the point cloud to a .txt file. Could you let me know if the colours exported are being radiometrically corrected before the export?

Thanks!

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