In the Build Point Cloud dialog box select the desired reconstruction parameters. If necessary, adjust the reconstruction volume (bounding box) in the Model view mode using Rotate Region, Resize Region, and Move Region instruments.Ģ. This option allows you to compensate for calibration inaccuracies for lenses that are not exactly described by the current Brown's camera model used in Metashape.ġ. Usually, Fit additional corrections can actually give an improved result for the RTK drone in a project without using GCP. To improve the accuracy of the alignment use Optimize Cameras option from the Tools menu and select the parameters for optimization as presented in the image below. For a multi-camera system, it will be enough to specify the projection of the marker on only one channel (not necessarily on all). If you used GCPs, you should place markers and load the coordinates before optimization. If you have ground control points (GCPs), you can find useful information about workflow with markers in our solution - Aerial data processing (with GCPs). The result of the align photos operation will be shown in the Model view as the estimated camera locations and tie point cloud (representing the matching points between the images): To cancel the processing click Cancel button. The progress dialog box will appear displaying the current processing status. The settings presented on the image below are set based on the particular dataset parameters and can be referred to as example values, the settings may differ depending on the project.ĭisabling Generic preselection option may be helpful for the low resolution images of the areas with vegetation, such as crop fields or forests.Ĥ. In the Align Photos dialog box select the desired alignment options. Select Align Photos. command from the Workflow menu.Ģ. Additionally, the relative offsets of the sensors in the rig and the interior orientation (calibration) parameters for each sensor are estimated.ġ. At this stage, Metashape estimates the camera position and orientation for each multi-camera system and generates a tie point cloud consisting of the tie points. Once the images are loaded into Metashape, they need to be aligned. You can find the workflow for such a case in our article - MicaSense Altum processing workflow (including Reflectance Calibration) in Agisoft Metashape Professional (both for automatic detection and manual masking of the calibration images). If you have images of the radiometric panel, it is recommended to include them in the calibration process. Enable Sun sensor for calibration and press OK button: Open Tools Menu and choose to Calibrate Reflectance option. Only the Sun sensor option is to be used for the Reflectance calibration if no radiometric panel had been used and no calibration images had been provided for the dataset. It is possible to select several cameras and apply Set Accuracy. command from the images context menu on the Reference pane and input accuracy data both for a position (i.e. If this data is missing, then set accuracy (m) manually. It is suggested that prior to adding images to the project the following options are to be enabled in the Advanced tab in the Preferences dialog (select Tools > Preferences.): Load camera orientation angles from XMP meta data and Load camera location accuracy from XMP meta data. The coordinate information will be automatically loaded from the image meta data to the Reference pane. Don't add JPG files from the RGB camera that may also be present in the images folder. Select Multi-camera system data layout in the Add Photos dialog - thus Metashape will automatically arrange the bands according to the information in the image metadata.Īdd images only in TIFF format to the project (all selected at once). In the Add Photos dialog browse the source folder and select files to be processed. The parameters shown in the images in the article are recommended for this type of data. This article describes the following processing steps: We are grateful to Gembloux Agro-Bio Tech (University of Liège) for the provided dataset. This tutorial covers the main processing stages related to the DJI multispectral data processing. Modified on: Wed, 22 Mar, 2023 at 11:09 AMĪgisoft Metashape Professional supports the processing of multispectral images captured with DJI P4 Multispectral drone. Solution home Tutorials Multispectral and thermal data processing DJI Phantom 4 Multispectral data processing
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