Messages

1

General / About Camera projection center in Metashape

« on: November 07, 2022, 06:09:12 AM »

I have a question about camera projection center described in
Appendix D. Camera models section of
https://www.agisoft.com/pdf/metashape-pro_1_8_en.pdf .

Is camera projection center "optical center of lens" or "center of CMOS image sensor"?


My understanding is "optical center of lens" in attached image.

Is it right?

2

Python and Java API / Re: how to apply NDVI formula with pan-sharpening RedEdge-P bands?

« on: July 12, 2022, 10:07:31 AM »

Thank you Mr Paulo,

You answered about the way to output pan-sharpening bands.

So I want to know how to apply NDVI ,say, "NIR - RED"/"NIR + RED" formulae after your process.

3

Python and Java API / how to apply NDVI formula with pan-sharpening RedEdge-P bands?

« on: July 12, 2022, 04:15:23 AM »

I read MicaSense article which describes how to output pan-sharpening bands from input bands.

https://support.micasense.com/hc/en-us/articles/4416696717847-Pan-sharpening-processing-data-from-RedEdge-P-sensor-in-Agisoft-Metashape

This article explains how to output pan-sharpening bands first, then how to apply NDVI formula using output bands.

How do I need to do these process using Python API?

4

General / Coordinate value is different so mach between NDVI and RGB orthomosaic ALTUM

« on: April 13, 2021, 09:41:03 AM »

I used ALTUM sensor and using python script to generate Orthomosaic TIFF.

I updated camera location using CSV.

Output ortho's positon values are very different.

I looks like several meters difference.

I want to know the reason of this and how to improve this.

5

General / Re: Reflectance calibration does not produce the results shown in the tutorial

« on: November 13, 2020, 09:39:56 AM »

I tried to divide each bands by 8192, it displayed like attached.

do you think this setting is right?

6

General / Reflectance calibration does not produce the results shown in the tutorial

« on: November 13, 2020, 07:59:24 AM »

Hello,

I am trying the tutorial for ALTUM spectral camera's reflectance calibration.
https://agisoft.freshdesk.com/support/solutions/articles/31000148780-micasense-rededge-mx-processing-workflow-including-reflectance-calibration-in-agisoft-metashape-pro

I got reflectance values CSV from micasense and loaded it into Metashape.

In the tutorial, generated dense point cloud and orthomosaic is RGB colored,
But when I tried same procedure in the tutorial, always I get "Black" orthomosaic and pointcloud.

Do you know to solve this phenomenon?

Best Regards,