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Topics - jguan

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General / Issue of orthophoto with DJI Phantom4 Multispectral
« on: February 23, 2021, 02:04:07 PM »
Hi everyone,

Since March 2020, we have started to use Agisoft Metashape Pro to generate multi-spectral orthophoto with the photos taken by DJI Phantom4 Multispectral.

There are at least one hundred orthophotos that have been generated, in most of these orthophotos, we have found this problem (see the attachment): There are alternately spaced ribbons on the orthophoto, and are consistent with the drone's flight path. It seems that more camera calibration may be needed. But there doesn't exist a panel calibration for this drone.

Does anyone else encounter the same problem, is there any good solution?

Thanks a lot.

Jeany

2
Camera Calibration / calibration reflectance for camera MultiSPEC-4C
« on: February 23, 2021, 01:01:43 PM »
Hi everyone,

We try to align some photos taken by camera MultiSPEC-4C with Agisoft Metashape Pro 1.7.1.

But we met some problems when we want to calibrate reflectance, actually, we don't have a CSV file with calibration information.

Does anyone know where can I find these factors reflectance for this camera? We have only a calibration target in the box of the camera.

Thanks a lot.

Jeany

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