Upload, view, and overlay images
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See the View and navigate in the 3D interface page for basic 3D navigation principles.
Segments.ai allows you to upload images along with point clouds. Additionally, you can also specify the camera calibration parameters, which allows you to view the 3D point cloud and objects on the image. See for information on how to add camera images and calibration parameters to a sample.
When you open a sample with images, you can see the thumbnails of the images at the bottom of the main labeling window.
Click on the thumbnail of the image
Or press the number key (1 - 9) corresponding to the image. The images are numbered from left to right.
The 3D overlay (of objects and the point cloud) is only visible if the camera parameters of the image are specified.
Click on the thumbnail of the image again
Or press Esc
Or press the number key (1 - 9) corresponding to the image again
To zoom in or out, scroll using the mouse wheel, or double-click in the viewer.
Hold the hotkey (Ctrl/cmd by default) and click and drag.
To toggle the point cloud overlay on and off, press the hotkey (Ctrl + q by default) or toggle it in the 3D interface settings. Disabling the point cloud overlay allows you to see the camera image in more detail, while enabling it allows you to see if the camera and lidar are well calibrated.
When one or more calibrated images are available, a synchronized image viewer appears in the bottom right of the screen. When hovering in the perspective or top view this viewer automatically zooms to the location of the pointer in the closest camera image.
When a cuboid is selected, the synchronized image viewer shows the active cuboid in every camera image where it appears.
To switch between the camera images, press the arrow buttons on the left/right of the synchronized image viewer, or press a rectangle at the bottom of the synchronized image viewer.
You can also zoom/pan in the synchronized image viewer in the same way as in the image viewer (see above).
When adding images to a sample, you have to specify a row and column for each image. This information is used to display a grid of your images. You can view this grid in a separate browser tab (which you could move to a second screen).
You can interact with the images in the grid as follows:
To zoom in/out on an image, scroll using the mousewheel or double-click on the image.
To pan an image, click and drag on the image.
To open the image viewer in the main labeling window, click the camera icon in the top right corner of the image.
To open the image grid in a new tab, press the "Open grid" rectangle next to the camera images at the bottom of the main viewer.
