Image annotations

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This article describes how to annotate images for inspection purposes.

Access the Image viewer

To start inspecting images, choose one of the following methods:

  • In the Layers tab of the left side navigation menu, click an image in the Camera Layer.
  • In the 2D view, click on a 2D camera icon.
  • In the 3D view, click on a 3D camera icon

The Image viewer opens on the right. The image enlarged at the top of the viewer is the one that has been clicked or whose camera icon has been clicked. The rest of the images appear as miniatures in the carousel at the bottom of the viewer.

Browse the image

The image can be browsed by:

  • Clicking the arrows shown on the enlarged image.
  • Using the left and right arrows on the keyboard.
  • Using the scroll bar under the carousel and clicking on a different image.
  • Clicking a different image in the Camera Layer in the Layers tab of the left side navigation menu.
  • Clicking a different 2D camera icon in the 2D view.
  • Clicking a different 3D camera icon in the 3D view.
  • Clicking on the point cloud in the 3D view. This will automatically select the best image that contains the selected point.

Annotate the images

To annotate an image:

  1. Choose the image to annotate, by using one of the above methods or by picking the image miniature from the carousel.
  2. Click annotation_on_image.pngAdd annotation to start using the Image annotation tool. The icon turns blue and the cursor becomes a cross when in the editing mode.
  3. Add a rectangular box to highlight features on a specific image: start drawing from the central point of the item that is being annotated and drag the cursor to adjust the dimension of the annotation box. When drawn, the Image annotation details panel opens.
  4. Add the details of the image annotation:
  • Annotation type: the user can insert any value. Uncategorized is the default type. The inserted types are remembered for future annotations of the user.
  • Severity level: choose a severity level from 1 to 5 (green to red from the lowest to the highest) or an undefined level (?). Undefined is the default severity level.
  • (Optional) Description: comments or further descriptions can be added in this field.

The content of the details is automatically saved when drawing the box.

A circle now appears in the image miniature in the carousel. The circle is filled with:

  • The color corresponding to the severity level of the created image annotation.
  • The number of image annotations with the same severity level in the same image.

Once drawn, the image annotation cannot be moved. Delete it and draw a new one if needed. 

How to delete image annotations

To delete an image annotation:

  1. In the Image viewer, enlarge the image with the image annotation that has to be deleted.
  2. Ensure the editing mode is off: the icon Image annotation tool icon is black and the cursor is not a cross.
  3. Click the box of the image annotation that has to be deleted.
  4. In the Image annotation details panel, click Delete annotation.

How to mark an image as reviewed

An image can be marked as reviewed.

To mark an image as reviewed:

  1. Choose the image to mark, by using one of the above methods or by picking the image miniature from the carousel.
  2. At the top left of the Image viewer, tick the checkbox Reviewed.

The image miniature in the carousel now shows the Reviewed tag.


Image annotations in the reports

Image annotations are included in the reports that can be exported from Pix4Dinspect. More information in: Reports.


Link the 3D view with the Image viewer

The Image viewer is by default linked to the 3D view. This means that, when browsing the images:

  • If in the 3D view, the 3D view is aligned with the view of the camera that is selected in the Image viewer.

At the top of the Image viewer, click link.png to toggle the link with the camera view.

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