Example Datasets Available for Download: Spherical Camera

Spherical Camera 
The goal of this project is to generate the 3D model of a church taken by an NCTech iSTAR spherical camera. 
3D Textured Mesh
General project information
Project
Location "The Church of Santiago", located in Betanzos (A Coruña, Spain)
Average Ground Sampling Distance (GSD) Undefined
Area covered Undefined
Output coordinate system Arbitrary Coordinate System 
Image acquisition
UAV None
Image acquisition plan 2 walks in the church
Camera NCTech iSTAR
Images
Number of images 8
Image size 10000x5000
Image geolocation coordinate system Arbitrary Coordinate System
GCPs
Number of GCPs None
GCPs coordinate system None
Download* and project files

The dataset can be downloaded here.

The downloaded folder contains the following files and folders: 

  • images: RGB images in JPG format.
  • example_spherical.p4d: project file that can be opened in Pix4Dmapper.

*The usage of this dataset is meant to be for personal and professional training. If you would like to use it for commercial or promotional objectives, please be sure to mention "Courtesy of Pix4D / pix4d.com" linking all this text to pix4d.com.

Instructions

Follow the instructions to:

Process the dataset using the included .p4d project file

This section describes how to process the dataset in order to generate the 3D model of a building.

1. Open the project example_spherical.p4d by double clicking it. 
2. On the Menu bar, click View > Processing. The Processing bar opens at the bottom of the main window.

 
Note: As the goal of this project is to generate only the 3D model (no DSM or Orthomosaic), the template selected for processing is 3D Models. This can be seen in Process > Processing Options... .

 3. On the Processing bar, click Start to start the processing.

Process the dataset creating a new project

This section describes how to create and process a project in order to generate a 3D model of a building.

A) Create a new project:

1. Start Pix4Dmapper.
2. On the Menu bar, click Project > New Project....
3. The New Project wizard opens.
4. In Name: Type a name for the project. In this example, type example_spherical.
5. (optional) In Create In: click Browse..., and in the Select Project Location pop-up, navigate to select the folder where the project and results will be stored and click Select Folder.

 
Note: When the project is created, a folder named after the project name typed in the Name field will be created in the selected folder and will store all the results. The .p4d project file will also be stored in this folder.

6. (optional) Select the check box Use As Default Project Location to save all new projects in the selected folder.
7. In the section Project Type, keep selected the default option New Project.
8. Click Next.

The New Project wizard displays the Select Images window.

9. Click Add Directories... and select the images folder to add the images to the project.
10. Click Next.

The New Project wizard displays the Image Properties window. No image geolocation is detected.  The camera model is loaded from the camera model database (iSTAR_2.7_10000X5000(RGB)).

11.Click Next.

The New Project wizard displays the Select Output Coordinate System window. By default the last output coordinate system selected in the software is selected.

12. Select Arbitrary Coordinate System with Unit meters.
13. Click Next.

The New Project wizard displays the Processing Options Template window. 

 
Note: As the goal of this project is to generate only a 3D model (no DSM or orthomosaic), the template selected for processing is 3D Models.

14. Select the 3D Models template.
15. Click Finish to finish the wizard and create the project. The Processing bar opens at the bottom of the main window.

B) Process the project:

1. On the Processing bar, click Start to start the processing.

C) Improve the project:

To improve the results of the Densified Point Cloud and the 3D Textured mesh, the following Processing Options can be selected:

1. On the Menu bar click Process > Processing Options...
2. Select the processing step 1. Initial Processing.
3. Select the tab General.
4. In the section Keypoints Image Scale, select Custom and from the drop down list select 1 (Original Image size).

 
Note: This selection allows to extract the keypoints using the original image size. 

5. In the Processing Options window click 2. Point Cloud and Mesh.
6. Select the tab Point Cloud.
7. In the Point Cloud Densification section click the drop-down list Image scale and select 1 (Original Image size, Slow) and from the drop-down list Point Density select High (Slow).

 
Note: The original image size is used to compute additional 3D points. More points are computed especially in areas where features can be easily matched. By selecting High Point Density, a 3D point will be computed for every Image Scale pixel. For more information about the Processing Options: 202557799

8. Click OK.
9. On the Processing bar, click Start to start the processing.

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