# About reflectance panel and radiometric correction **URL:** \ **Category:** Agriculture\ **Created:** [March 21, 2022, 10:47am UTC](https://community.pix4d.com/t/about-reflectance-panel-and-radiometric-correction/21915 "2022-03-21T10:47:23Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![echo825](https://avatars.discourse-cdn.com/v4/letter/e/7feea3/32.png) [@echo825](https://community.pix4d.com/u/echo825)\ **Post date:** [March 21, 2022, 10:47am UTC](https://community.pix4d.com/t/about-reflectance-panel-and-radiometric-correction/21915/1 "2022-03-21T10:47:23Z")
Hi I used the sequoia panel to calibrate the image taken by DJI multispectral camera. But Pix4D fields sent out this message. ‘‘Reflectance targets were found, however, the reflectance factor could not be determined for all bands. Performing radiometric correction without reflectance targets.’’ what’s the problem? ---
**Author:** ![Jose.Arnaudo](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/jose.arnaudo/32/5966_2.png) [@Jose.Arnaudo](https://community.pix4d.com/u/Jose.Arnaudo)\ **Post date:** [March 21, 2022, 1:50pm UTC](https://community.pix4d.com/t/about-reflectance-panel-and-radiometric-correction/21915/2 "2022-03-21T13:50:44Z")
Hi, This is caused due to the lack of blue band in the sequoia camera, I guess the reflectance panel doesn’t have it either. So when trying to calibrate all bands from P4M, blue is missing. Also read “The Parrot target does not report reflectance values for the P4M bands. You need to measure them yourself. First, measure the spectral reflectance factor with a spectro-radiometer. Then you need to know the spectral sensitivity of the P4M bands, and using that you can compute the effective nominal reflectance value of the Parrot target for the P4M bands” stated in this thread > [@Reflectance by Phantom4 Multispectral](https://community.pix4d.com/t/reflectance-by-phantom4-multispectral/13536/12): > > Hi all, Let’s assume we get the correct factor values (from parrot or lab calibration) for using the parrot sequoia calibration target in our DJI P4 MSP processing. Can you explain how this can be done automatically, without the need from us manually to type in the reflectance factor value in the radiometric calibration window? At the moment the calibration target is automatically selected and also the light blue rectangle is drawn (so it is detected) but the factor values are missing. Best. José ---
**Author:** ![echo825](https://avatars.discourse-cdn.com/v4/letter/e/7feea3/32.png) [@echo825](https://community.pix4d.com/u/echo825)\ **Post date:** [March 22, 2022, 12:20am UTC](https://community.pix4d.com/t/about-reflectance-panel-and-radiometric-correction/21915/3 "2022-03-22T00:20:22Z")
Thank you Arnaudo. Then, can you recommend another calibration panel? Is it possible to correct the radiometric information of other companies’ panels? e.g. sentera or micasense? ---
**Author:** ![Jose.Arnaudo](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/jose.arnaudo/32/5966_2.png) [@Jose.Arnaudo](https://community.pix4d.com/u/Jose.Arnaudo)\ **Post date:** [March 22, 2022, 9:46am UTC](https://community.pix4d.com/t/about-reflectance-panel-and-radiometric-correction/21915/4 "2022-03-22T09:46:53Z")
Correct, Micasense or Sentera could be used. Best ---
**Author:** ![Timbang\_Deli](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/timbang_deli/32/356_2.png) [@Timbang\_Deli](https://community.pix4d.com/u/Timbang_Deli)\ **Post date:** [September 26, 2022, 7:39am UTC](https://community.pix4d.com/t/about-reflectance-panel-and-radiometric-correction/21915/5 "2022-09-26T07:39:51Z")
Hi Jose, just to confirm, if we use calibration panel from sentera or micasense there will be no problem in processing P4M image in pix4d? For the result, is it sufficient enough to be used in plant monitoring? thanks ---
**Author:** ![Jose.Arnaudo](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/jose.arnaudo/32/5966_2.png) [@Jose.Arnaudo](https://community.pix4d.com/u/Jose.Arnaudo)\ **Post date:** [September 27, 2022, 9:44am UTC](https://community.pix4d.com/t/about-reflectance-panel-and-radiometric-correction/21915/6 "2022-09-27T09:44:04Z")
Hi, Yes they can be used for plant monitoring. Best,