FOVEX 360s/Creating Project Manual
Setting up a Project
The following steps show how to setup a measurement project manually:
Accessing Project Data and Results
FOVEX 360S Graphical User Interface (GUI) provides 4 different views (tabs) for accessing data and results:
|Image View||It displays the image content and related measurement data. To view an image, double-click on the Image item in the Project Explorer.|
|Network View||It displays the 3D measurement network including camera stations, 3D points, error vectors and CAD objects.|
|Report View||It displays the content of the item at Project Explorer in tabular and text forms. The tabular or text forms of the items at Project Explorer are shown in Report|
|Layer View||It displays the defined layers for the project. To view content, click on Layer View tab.|
Image orientation means finding the most accurate estimate for three orientation angles (w, phi, and kappa) and the 3D coordinates of the location of the camera stations. These 6 parameters are called exterior orientation parameters of an image.
Estimation of these parameters does not require external information such as distance between camera stations or the location of the image points in 3D.
Automated with Natural Features
The quality of image orientation with this method depends on the quality of the extracted features in the image. The following steps provide necessary information to orient images successfully.
|Step 1.||From the toolbar press on Auto Process with Natural Features (Auto Process toolbar).
The result of Auto Process with natural features. The network does not have yet a proper scale.
|Step 2.||Scale of the network can be recovered by manual scale-bar definition.
This process has been explained in the section “Add Scale Bar”.
|Note: The group of Feature Detection & Matching parameters influences the results of feature detection and matching. This group of parameters can be accessed from Project Explorer the Settings of the project:|
Manual with Image Point Measurement
This method needs the interaction and supervision of the user. It is suggested for the projects in which good quality of natural features are not available. The following steps provide necessary information to orient images by manually measurement of the image points:
|Step 1.||Open two images which have sufficient (>50%) overlap from the list of images at Project Explorer. These two images should not be taken from an identical location.|
|Step 2.||Measure at least five corresponding image features among these opened images and associate unique but corresponding labels to them. Choose your image points such to spread them across the image. Image features can be measured by using the “Draw manual point” at the toolbar of the Image View:
Correspondence of image feature measurement is defined in FOVEX 360s by giving a unique label to the corresponding features. For example, “A0” in the following:
The following Figure shows all the manually measured corresponding image points at two different images:
|Step 3.||Perform Orient Images. Orient Images can be accessed from the Adjustment toolbar:
|Step 4.||If the number of corresponding image points is more than 12 and still the images are not
oriented, go to step 5. Before going to step 5, double check if all image points are corresponding to each other.
|Step 5.||If all images are oriented or you would like to stop building network process, then go to 7.|
|Step 6.||Open the next non-oriented image (with a red decoration color) and go to Step 2.|
|Step 7.||End of image orientation. The following figure shows the result of image orientation for this project which was consisted of 4 images:
Scaling the Project
The final step of the creation of a 3D measurement project is scaling the project. Scale-bars can be added to the project in three ways. Click on Scale Bars at Project Explorer and go to the tab of Report View. Right Click on the middle of window and select Add Scale Bar. The next sections describe possible ways to adding scale to project.
Context menu of Scale Bars at Report View: the addition of a scale bar to the project.
Add Scale Bar
By clicking on Add Scale Bar a tabular form is displayed as follows:
The following information should be given for each scale bar:
- A unique ID of the scale-bar
- The first ID of scale-bar end point 1
- The second ID of scale-bar end point 2
- Calibrated temperature, if available
- Calibrated length of the scale-bar
- Standard deviation (uncertainty) of the scale-bar length
Click on the Active Check Box and the project will be scaled to the size of the given scale bar.
Add Scale by Camera Station
By clicking on Add Scale by Camera Station the following dialog box is displayed:
Provide the distance between up & bottom camera stations and Press “Add”. The project will be scaled automatically with the given length of scale-bars.