Agisoft Metashape: Video Photo Cutting and 3D Model Building

(Recommended to save the project after each step)

1. Cutting Photos from Video

• Go to File > Import > Video.
• Choose a folder to save the extracted images.
• Trim the video to remove unnecessary parts by setting Cut In and Cut Out.
• Set Frame Step to Large.

2. Align the Photos (This step also call Tie Points)

• Go to Workflow > Add Folder > Single > Add Photos.
• Next, go to Workflow > Align Photos. (Accuracy: Moderate) Once the processing is complete, click the Camera Icon to proceed.

3. Building the Point Cloud

• Go to Workflow > Build Point Cloud

Quality: Medium
Click- save project after each step
Click- Calculate point confidence
Depth filtering: Mild

(After this stage you can skip to stage 9 and build DEM- if you don’t need a nice 3D model)

4. Move Region

* organize the box on the model area- Align the model with the axis orientation.

5. Scale the Model

• Add marker point > Right click on a specific point and 1 more point.

• Create scale bar > Select 2 point in the reference > Right click on the scale bar > modify- change the distance.

• Add marker point > change to z and set to 0

• Tools > optimize cameras > ok > yes

• Model> Transform Object> Update Transform

Save!!!!

6. Cleaning

Manual cleaning – go to manual selection icon and select “free form”, then select the point that irrelevant and delete.

7. Building the 3D Model (The “Build Model” - creating a 3D representation of your object, which includes both dense cloud generation and mesh creation)

• Go to Workflow > Build Model.

• Source data: Point cloud.

• Face count: Moderate.

After the processing is complete, click the Triangular Icon to finalize the model.

8. Building the Texture (the Build Texture process is used to apply photographic textures to a 3D mesh or model, giving it realistic surface details. Essentially, it wraps your 3D model in high-resolution imagery to make it look more lifelike and visually accurate)

• Go to Workflow > Build Texture.

• Texture type: Diffuse map

• Source data: images

• Mapping mode: Generic

• Blending mode: mosaic

• Texture size: 8192

After the processing is complete, click the small arrow next to the Triangular Icon and select TEXTURED.

9. Building the DEM (Digital Elevation Model- represents the elevation of the terrain. It is created from the dense point cloud or mesh)

• Go to Workflow > Build DEM.

10. Building the Orthomosaic (is a type of aerial photograph that has been geometrically corrected so that the scale of the image is uniform across the entire image. In simpler terms, it’s a map-like image where the distortions from the camera angle or topography have been removed, making it a “true” representation of the earth’s surface)

• Go to Workflow > Build Orthomosaic.

• Set Pixel Size to 0.0005x 0.0005y.

11. Exporting Results

• Go to File > Export > Export Orthomosaic.

• Choose JPEG (with Tiff: None).
  • Export DEM:

• Go to File > Export > Export DEM.

• Choose Tiff.

• No Tiled