AI Vision Investigation

Explore AI Vision with an example project! Can you answer all the questions correctly?

Step by Step

Diagram Description: A visual representation of a VEX AIM activity field. It shows a grid with a VEX AIM Coding Robot positioned in the center. Around the robot are various objects: a sports ball (yellow), an orange barrel, a blue barrel, an AprilTag with ID 1, and a small red classroom object (like a pom pom). The layout is designed to test the robot's AI vision capabilities.

Place the VEX AIM Coding Robot in the center of the field. Place a sports ball, an orange barrel, a blue barrel, AprilTag ID 1, and one small red classroom object (like a pom pom) around the field, as shown in the diagram above.
Open this VEXcode AIM project, or recreate the project shown on the next page in VEXcode AIM, and download it to the robot.
Read the project, and predict what you think the robot will do when the project is run.
Run the project and observe the robot's behavior. Then, think more about the blocks in the project. Answer the following questions in your journal:
- What does the AI Vision viewer block do when the project is run?
- If the robot isn't responding to the red pom-pom, how can you use the viewer to help debug the problem?
- Which parameter should you select in the get data block to get the sports ball data from the AI Vision sensor?
- Why do you need to use the get data block before the Al Vision object exists? block?
- Why is the get data block inside a forever loop? What happens if it is outside the loop?
- What does the bearing value from the Al Vision object property block tell the robot?

'LEVEL UP'

Aim at the Cargo – Select a cargo object to detect. Remix the project to code the robot to turn toward a barrel or sports ball.
Detect the Pom Pom - Remix the project so your robot can turn until the red pom pom (or classroom object) is detected.

Pro Tips

View the VEXcode API Reference to learn more about Al Vision commands. [VEXcode API Reference]
For more information about the Data in the AI Vision Utility, see this VEX Library article. [VEX Library Article]

Project Code Description

The VEXcode AIM project uses a block-based programming interface. The sequence of blocks is as follows:

When Started Block:

AI Vision show viewer on screen: Activates the AI Vision viewer.
Turn to find the AprilTag ID 1: Commands the robot to orient itself towards AprilTag ID 1.
Set turn velocity to 20 %: Sets the robot's turning speed.
Turn right: Initiates a right turn.

Forever Loop:

Get AprilTag ID 1 data from AI Vision: Continuously attempts to retrieve data for AprilTag ID 1 from the AI Vision sensor.
If Block: Checks if AI Vision object exists? is true.

If true, the robot executes: Turn to heading (heading in degrees) + AI Vision object bearing degrees. This block turns the robot to face the detected object.
Break: Exits the current loop (the 'if' block's execution).

Wait 0.02 seconds: Pauses the robot's execution briefly.

Standards

CSTA 1B-CS-02: Model how computer hardware and software work together as a system to accomplish tasks.

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