> For the complete documentation index, see [llms.txt](https://support.senterasensors.com/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.senterasensors.com/home/sentera-calibrated-reflectance-panel/sentera-calibrated-reflectance-panel/calibration-imagery-post-processing/radiometric-corrections-with-pix4d-mapper.md).

# Radiometric Corrections with Pix4D Mapper

{% hint style="info" %}
Pix4D Mapper is only recommended for users with Type 4 Panels. Other panel types can be automatically processed in Pix4D Fields. Support for Type 4 panels is coming soon to Pix4D Fields. 
{% endhint %}

Radiometric Corrections are performed in Pix4d Mapper by manually outlining the Reflectance Panel and inputting the Reflectance Factor value for each spectral band. Click the link below to view Pix4D's support documentation.

{% embed url="<https://support.pix4d.com/hc/en-us/articles/206494883>" %}
How to Perform Radiometric Corrections with Pix4D Mapper
{% endembed %}

***

## Reflectance Factors by Sensor

Ensure that you use the Reflectance Factor values corresponding to your panel type and sensor. Select your sensor below to view the Reflectance Factor values for each panel type.

<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td>6X Series Sensors</td><td><a href="/files/ie7njkEcFKdzuHN1Ot8j">/files/ie7njkEcFKdzuHN1Ot8j</a></td><td><a href="/pages/4I33wN4keql1AAlfKRXD">/pages/4I33wN4keql1AAlfKRXD</a></td></tr><tr><td>Mavic 3 Multispectral</td><td><a href="/files/Hb8MroT1tRcmeUANvfLZ">/files/Hb8MroT1tRcmeUANvfLZ</a></td><td><a href="/pages/TbQHTTc2tHQXg2TF5MXu">/pages/TbQHTTc2tHQXg2TF5MXu</a></td></tr><tr><td>Phantom 4 Multispectral</td><td><a href="/files/fTsNexnCywYnY4gJltPr">/files/fTsNexnCywYnY4gJltPr</a></td><td><a href="/pages/ptT4kT7WxyDgJrXIHAPC">/pages/ptT4kT7WxyDgJrXIHAPC</a></td></tr></tbody></table>

***

## Instructions

{% stepper %}
{% step %}

### Processing Options

On the menu bar click **Process > Processing Options...**, the pop-up *Processing Options* appears.
{% endstep %}

{% step %}

### Index Calculator

Click **3. DSM, Orthomosaic and Index** and select the tab **Index Calculator**.

<div data-with-frame="true"><figure><img src="/files/vkBY2NgF6yWVE62jRSC0" alt=""><figcaption></figcaption></figure></div>
{% endstep %}

{% step %}

### Begin Calibration

In the section *Radiometric Processing and Calibration*, the different available discrete bands are displayed. Under each band, click **Calibrate...**
{% endstep %}

{% step %}

### Select Panel Image

Click **Browse...** to import the corresponding image of the calibration target for the selected band.

<figure><img src="/files/0HYOiqGkosV47dGaCfw6" alt=""><figcaption></figcaption></figure>

Draw a region on the image that will define the radiometric calibration area, the region should be well inside the gray target and exclude all borders.&#x20;

Insert the *Reflectance Factor* value for the selected band.&#x20;

{% hint style="warning" %}
Ensure that you're using the correct value for your sensor and panel type. [#reflectance-factors-by-sensor](#reflectance-factors-by-sensor "mention")
{% endhint %}

Click **OK**. The camera is now calibrated for this band.
{% endstep %}

{% step %}

### Repeat for each band

Repeat the same procedure for each of the discrete band, click **OK** and run the project.
{% endstep %}
{% endstepper %}