Pix4d Fields generates a Reflectance map?

Agriculture Pix4Dfields Feature Request
1

I’ve been looking for all the web if Pix4d Fields has a Reflectance Map output as Pix4d Mapper has, it’s important for us to know this before we buy the licence. Thanks for your help

2

Yes Pix4dfields outputs reflectance values if you have a drone with radiometry support. What drone do you want to use?

3

Thanks for the response! We use an AgEagle Ebee X with a Micasense Red Edge

4

Yes that will work perfectly, it will also automatically recognize the calibration panel, if present in the dataset.

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5

Hi all, I just have a question, my reflectance map in redege, nir or another mono band of the MAvic 3 M (from the multispectral sensor) (red, green, rededge and nir) give me values between 0,00 and 0,01. It seems to me streange value and need an multiplication by 255 no ?
But when i make reflectance map with the RGB sensor I have values between 0 and 2 (when I split by 255 like red / 255 or green / 255) it seems to me normal no ?

In fact my question is, how can I have an good reflectance map with my monobands (nir, redege …)?

Thanks for your responses

6

You need to use a radiometric reflectance target to calibrate your dataset:

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7

Can we use a radiometric reflectance target after generate the map or do I to import in first the picture of the radiometric reflectance traget before import the rest of pictures ?

8

For information I saw that I forgot to import the radiometric reflectance target picture before strat the generating of the map,

I restarted the process and it’s all good :wink: :sweat_smile:

Thank for your helpfull,

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9

After several tries I have again a small problem,

Importing the radiometric reflectance target before starting the map generation does not always work despite the fact that the radiometric correction is checked during the import,

Any idea ?

I may have the answer to my own question,

During my tests I used two radiometric reflectance target:

  • The radiometric reflectance target from MAPIR
  • The radiometric reflectance target from Micasense

What I observed is only valid when I use the MAPIR radiometric reflectance target,

When I use the Micasense radiometric reflectance target, I manage to make the reflectance maps band by band,

I think in the end that the MAPIR radiometric reflectance target is not supported by Pix4D Fields (too bad and it’s too bad that we can’t enter the values of radiometric reflectance target manually as on pix4D mapper), is that right?

which I may have the answer to my own question,

During my tests I used two radiometric reflectance target:

  • The radiometric reflectance target from MAPIR
  • The radiometric reflectance target from Micasense

What I observed is only valid when I use the MAPIR radiometric reflectance target,

When I use the Micasense radiometric reflectance target, I manage to make the reflectance maps band by band,

which radiometric reflectance target are supported by Pix4D Fields ? And which have we have to use for the Mavic 3 M ?

10

Hi,

You are right, PIX4Dfields does not support Mapir reflectance target. Although, for the M3M, we encourage you to work with the Micasense one as we know it’s compatible with the M3M as well.

Best
José

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