Viewing Images Tutorial - ngageoint/voxel-globe GitHub Wiki
Viewing Images
Viewing the images and cameras can be accomplished using the "Image View" application. Viewing the cameras can be accomplished using the Tie Point Creator application. Creating tie points is covered here
Select the "Image View" link. Clicking the icon opens and closes the "Image Set" selection slide out.
When you upload a new dataset, the Image Set is created for you. Select your recently uploaded dataset (Providence for the tutorial), and click the icon to close the list.
This canvas easily handles images of any size, allowing you to use mouse wheel to zoom in and out, and click and drag to pan through the image. Through this OpenLayers3 interface you can:
- Pan around the image using click and drag
- Zoom in by double clicking, using the zoom bar on the right, pressing the + button on the right, or pinching-out on touch devices.
- Zoom out by shift+double clicking, using the zoom bar on the right, pressing the - button on the right, or pinching-in on touch devices.
- Rotate by using the rotate icon in the upper right corner, Shift+Alt+Click and drag (prevented by some Linux window managers), or pinch-rotating.
- Press the ⇑ (Image Up) icon to reset the image rotation
You can increase the number of images you are viewing by increasing the Display setting in the bottom left, up to 8 Images Per Page. Clicking Next Page and Previous Page allows you to view the rest of the images.
Viewing Camera
To view the cameras, return to the Home page and select the "Tie Point Creator"
images/tiepoint_creator_select.png
The icon is for Tie Point selection, not used here. Select your recently uploaded dataset, for the tutorial, use the Providence Image Sequence and Providence KRT for the Camera Set, and click the icon to close the list.
images/tiepoint_camera_viewer.png
On the left you will see the Cesium Virtual Globe viewer. Pan over until you can see the Orange Camera icon. Cesium has a similar mouse interface to the Image Viewer, see here for basic Cesium usage.
Each camera casts a center ray indicating the pointing direction of the camera model. Initially, all cameras except VXL KRT metadata will point straight down, until SFM processing has been ordered. Once SFM has been ordered and completed, all cameras will point in the correct direction.
Click on a camera to make it the center of rotation, where the frustum of the camera will be visible. Clicking the Next Page icon will exit this mode and show the next camera in sequence.
