Process one individual multispectral raw image (not mosaicing)

PIX4Dmapper
1

I am trying to determine the angle of the sun from the individual Sequoia Multispectral raw images. Is there any way I can determine that?

And is it possible to process 1 single raw image to get reflectance value (without mosaicing)?

Also, how can I get the footprint size of one single raw image?

2

Hi,

The sun angle value will be there in the image EXIF (Xmp.Camera.SunSensorRelativeRotation). After processing in Pix4DMapper, a file called project_name_sun_angles.csv is generated in the params folder: https://support.pix4d.com/hc/en-us/articles/202977149?page=1#comment_360009291071

You will need to have a look at Reflectance Estimation - Sequoia - Parrot Developers Forum or the other pages of parrot development forum for calculating reflectance value of a single image. You can also read the white paper here: https://support.pix4d.com/hc/en-us/articles/204894705-Camera-Requirements-for-Precision-Agriculture

By the footprint size, are you referring to the ground sampling distance?

3

Hi Momtanu,

Thanks for you, I will have a look. The footprint I mean how much area on the ground is captured by a single shot image. If I can calculate the X and Y distance in meter.

4

You can calculate that with the GSD calculator, it depends on the flight height, focal length, and some other parameters.

5

Oh Momtanu, Thank you so so much. This what you shared with me, answers it all!

1 Like