After tracking completes, the corrections stage in ABC Tracker allows for:
|Manual Mode||Guided Mode|
|You select which track to modify||ABC Tracker asks for information on a particular track|
|You select which operation to perform to modify the track||ABC Tracker performs operations automatically based on your input|
|You select the time frame to adjust||ABC Tracker queues up a few seconds of video footage and presents it for review|
In general, it is recommended to complete guided reviews first and then perform manual reviews
This is because guided reviews leverage behind-the-scenes tracking data to make semi-automatic connections, reducing the amount of manual effort to get accurate results
ABC Tracker automatically generates pre-built reviews for you to complete. These are instances where ABC Tracker has some tracking data available, but needs more confidence about a particular object's location or orientation. ABC Tracker will ask questions about an object, and then use your input to track that object and/or neighboring objects automatically.
Read the complete article on Guided Mode
ABC Tracker has a complete suite of tools to manually correct tracking data. These tools provide the ability to:
Read the complete article on Manual Mode
The solid vs. dashed bounding boxes indicate the presence or absence of detections for an object in a specific frame:
As Guided Reviews are completed, many of the dashed bounding boxes will disappear. This is because Guided Reviews are specifically chosen to provide ABC Tracker with the additional information it needs to have more confidence on an object's location.
There is a small diamond located on one end of each object. This diamond shows the position of the object's head.
If the diamond is on the wrong end of the object, it can be adjusted through a Manual Review.
Many of the incorrect orientations are automatically corrected during Guided Reviews, so often it is more efficient to complete the guided reviews first and then review the object orientations.
In ABC Tracker, the orientation of each object is visualized by the orientation of the object's bounding box. When these results are exported to CSV, the orientation is recorded using an image coordinate system (in clockwise order):
The method of performing corrections depends on the correction "mode." See the following pages for details on performing corrections:
ABC Tracker saves all corrections automatically. After a correction is performed, the green checkmark at the bottom-left corner of the playback window switches to a spinning gear. This indicates that ABC Tracker is processing the correction that was just completed, and the spinning gear will switch back to a green checkmark once the correction is finished processing.
Corrections can be undone at any time. After pressing the "undo" button at top-left corner of the video playback window, ABC Tracker will confirm that you would like to undo the last correction operation that was performed.
After performing an "undo" operation, it is best to wait until the green checkmark is displayed in the bottom left corner of the video playback window (see "Saving Your Work" section for screenshot).
This ensures that the tracking data being shown in ABC Tracker reflects the undo operation that was performed.
During corrections, ABC Tracker offers several video playback tools that can increase productivity.
To read more on these tools, see Video Playback Tools
During manual mode, the correction progress tab will display three statistics:
The Gantt chart displays one horizontal bar for each track. The length of the bar indicates the duration of the track. The x-position of the bar indicates the time-position of the track (beginning, middle, or end of the video).
A track can be selected by clicking on its corresponding bar in the Gantt chart. Once a track is selected, manual corrections can be performed on that object.
To make the Gantt chart disappear, move the cursor off of the Gantt chart area and onto the video playback window
All visualizations that are shown on the video player can be adjusted. Use the Visualization Properties tab to:
There are also global settings for the video playback window: