Represent connected CMUcam5 Pixy2 vision sensor and tracks object (color blob)
Since R2020a
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Add-On Required: This feature requires the Simulink Support Package for LEGO MINDSTORMS EV3 Hardware add-on.
Libraries:
Simulink Support Package for LEGO MINDSTORMS EV3 Hardware
Description
The Pixy2 Vision Sensor block allows you to extend the capabilities of the LEGO® MINDSTORMS® EV3 hardware and reads the coordinates of object (color blobs) detected by the Pixy2 vision sensor.
Note
This block supports Pixy2 LEGO firmware version 3.0.14.
Functional Modes
Pixy2 Vision Sensor block has four functional modes:
Color Signature: Detects object that matches the configured color signature in the PixyMon utility.
Color Code Signature: Detects object that matches the configured color-coded signature in the PixyMon utility.
Color and Color Code Signature (Mixed): Detects object that matches the configured color and color-coded signature in the PixyMon utility.
Line: Detects and tracks the line.
Launch PixyMon
If you have already installed the support package for LEGO MINDSTORMS EV3 hardware and followed the additional hardware setup as mentioned in Install Support for LEGO MINDSTORMS EV3 Hardware, the PixyMon utility will launch automatically.
Ports
Output
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X — x-location of the center of the detected object
pixels | scalar
The x-location of the center of the most significant object (color blob) based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to either Color Signature, Color Code Signature, or Color and Color Code Signature (Mixed).
Data Types: uint16
Y — y-location of the center of the detected object
pixels | scalar
The y-location of the center of the most significant object (color blob) based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to either Color Signature, Color Code Signature, or Color and Color Code Signature (Mixed).
Data Types: uint16
Width — Width of detected object
pixels | scalar
The width of the most significant object (color blob) based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to either Color Signature, Color Code Signature, or Color and Color Code Signature (Mixed).
Data Types: uint16
Height — Height of detected object
pixels | scalar
The height of the most significant object (color blob) based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to either Color Signature, Color Code Signature, or Color and Color Code Signature (Mixed).
Data Types: uint16
Object Count — Number of detected objects
positive integer in the range [1, 255]
The number of objects (color blobs) based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to either Color Signature, Color Code Signature, or Color and Color Code Signature (Mixed).
Data Types: uint8
Signature — Color or color code signature of detected objects
positive integer in the range [1, 7]
The signature of the color or color-coded objects (color blobs) based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to either Color Code Signature or Color and Color Code Signature (Mixed).
Data Types: uint16
Angle — Angle of detected object
integer in the range [-180, +180]
The angle of the color or color-coded signature of objects (color blobs) based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to Color and Color Code Signature (Mixed).
Data Types: int16
Xstart — Start point of x-coordinate for detected line
pixels | scalar
The starting point of the x-coordinate of the most significant line based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to Line.
Data Types: uint16
Ystart — Start point of y-coordinate for detected line
pixels | scalar
The starting point of the y-coordinate of the most significant line based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to Line.
Data Types: uint16
Xend — End point of x-coordinate for detected line
pixels | scalar
The ending point of the x-coordinate of the most significant line based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to Line.
Data Types: uint16
Yend — End point of y-coordinate for detected line
pixels | scalar
The ending point of the y-coordinate of the most significant line based on the field of view, as detected by the Pixy2 vision sensor.
Dependencies
To enable this port , set the Tracking mode parameter to Line.
Data Types: uint16
Intersection Flag — Presence of intersecting lines
1 (true) or 0 (false)
The presence of intersecting lines in the field of view of the Pixy2 vision sensor. 1 indicates the presence of intersecting lines.
Dependencies
To enable this port , set the Tracking mode parameter to Line.
Data Types: uint8
Parameters
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EV3 brick input port — Input port connected to Pixy2 vision sensor
4 (default) | positive integer in the range [1, 4]
Select the input port on the LEGO MINDSTORMS EV3 hardware to which the Pixy2 vision sensor is connected. There are four ports on the hardware and you can select any one of the ports. Specify a unique input port for each Pixy2 Vision Sensor block in the model.
I2C address — I2C bus identifier
0x54 (default) | address in the range [0x54, 0x57]
Enter the hexadecimal address of the I2C bus connected to the Pixy2 vision Sensor. Ensure that the same I2C address is configured in the PixyMon utility.
Tracking mode — Select tracking mode
Color Signature (default) | Color Code Signature | Color and Color Code Signature (Mixed) | Line
Select the tracking mode to detect the object that matches the configured color or color-coded signature in the PixyMon utility. The xy-coordinates, width, and height of the detected object remain the same for the Color Signature, Color Code Signature, and Color and Color Code Signature (Mixed) tracking modes.
Color Signature — Color signature of object to be tracked
1 (default) | positive integer in the range [1, 7] | ALL
Select the color signature of the object to be tracked as configured in the PixyMon utility. Select ALL to track all the configured color signatures.
Sample time — Time sample interval
0.1 (default) | positive scalar in the range [0.001, 1]
Enter the time interval at which the block reads values from the Pixy2 vision sensor.
Version History
Introduced in R2020a
See Also
Open Block Library for LEGO MINDSTORMS EV3 Hardware
Topics
- Track Colored Objects Using Pixy2 Vision Sensor
- LEGO EV3 Object Tracking System Using Pixy2 Vision Sensor and PID Controller
External Websites
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