Cody Casey
The PixyCam is a small camera that can track colored objects and, with the help of its pan/tilt kit, can physically move to aim itself. The Pixy2 is an upgraded version of the PixyCam, with added features such as line-following capabilities and built-in LED headlights. When assembled with the pan/tilt kit, the Pixy2 can auto-aim at moving objects. The tracking speed can be modified by adjusting the panLoop and tiltLoop PID numbers.
| Characteristics | Values |
|---|---|
| Can Pixy pan and tilt by itself? | Yes, Pixy can pan and tilt by itself with the help of its pan/tilt kit. |
| Tracking speed | Can be modified by adjusting the panLoop and tiltLoop PID numbers. |
| Power source | USB battery |
| Compatibility | Not compatible with Pixy for LEGO Mindstorms. |
| Ease of assembly | Easy to assemble with complete instructions provided. |
| Mounting options | Can be mounted on a desktop or a robot. |
| Camera movement | May wobble slightly as it attempts to center itself on the tracked object. |
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What You'll Learn
PixyCam can track coloured objects
The PixyCam is a small camera that can track coloured objects. It can be used without a PC, and it has a special aptitude for following coloured objects. The PixyCam uses a hue-based colour-filtering algorithm to detect objects. The object needs to have a distinct hue, and PixyCam can memorise up to seven different objects.
The PixyCam can be combined with a pan/tilt mechanism, which allows the camera to physically move to aim itself. The pan/tilt mechanism comes in a kit and requires assembly. The build takes some attention to detail, but once assembled, the PixyCam will auto-aim at moving objects. The tracking speed can be modified by adjusting the panLoop and tiltLoop PID numbers.
To teach the PixyCam an object, the object must be placed before the camera lens. The user must then select "Set Signature 1" from the Action menu and highlight the body of the object by keeping the left mouse button pressed. Once the button is released, the camera will memorise the item's colour. The LED colour will match the colour being presented, and when the button is pressed, the signature is set. The brightness of the flashing LED indicates the "goodness" of the hue of the object.
The PixyCam can also be taught an object through PixyMon. The user must plug in the USB cable between the PixyCam and a computer and run PixyMon. The user can then select "Action" and "Set Signature 1" from the pulldown menu. The user must then select the region they want PixyCam to use to learn the object. If successful, a "Success!" message will appear in the command window, followed by a response number between 0 and 100, which is the "goodness" number.
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The pan/tilt kit helps PixyCam aim itself
The PixyCam is a small camera that can track coloured objects. With the help of its pan/tilt kit, it can physically move to aim itself. The pan/tilt kit allows the PixyCam to auto-aim at moving objects. The kit is easy to assemble and comes with complete instructions. It includes a pan-tilt base that attaches directly to an Arduino with an Arduino-compatible hole pattern and includes stand-offs and fasteners. The pan/tilt program is built into PixyMon, so it's quick to get up and running.
The PixyCam can be taught to "see" a coloured object using a mouse to highlight the proper colour or via a single-button interface. Once the camera is enabled to track objects, the pan/tilt kit can be assembled. The PixyCam can be attached to an Arduino, Raspberry Pi, BeagleBone, or other dev board that communicates via SPI, I2C, UART, or USB. The tracking speed can be modified by adjusting the panLoop and tiltLoop PID numbers.
The pan/tilt kit for Pixy2 is redesigned and is smaller and faster than the original Pixy's pan-tilt kit. The Pixy2 also features line-following capabilities and a pair of bright LEDs to light its path. It is also cheaper than the original Pixy, at just under $60.
The pan/tilt mechanism is not compatible with Pixy for LEGO Mindstorms.
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Pixy2 is smaller, faster, and cheaper than the original Pixy
The PixyCam is a small camera that can track coloured objects and, with its pan/tilt kit, can physically move to aim itself. The Pixy2 is an upgraded version of the original Pixy. It is smaller, faster, and cheaper than the original Pixy.
Pixy2 has new algorithms that can detect and track lines, intersections, and "road signs". These road signs can be used to instruct a robot to perform actions such as turning left or right, or slowing down. Pixy2 performs these tasks at 60 frames per second, allowing the robot to be fast and efficient.
Pixy2 is also easy to set up and use. It comes with a special cable that can be plugged directly into an Arduino, and a USB cable to connect to a Raspberry Pi. It also offers software libraries for Arduino and Raspberry Pi to simplify programming. Pixy2 is entirely open-source, providing access to its software, firmware, and hardware.
Additionally, Pixy2 has line-following capabilities and a pair of bright LEDs to light its path. It can learn to detect objects by simply pressing a button. It only sends the data you are looking for, such as the X-Y coordinates, size, and unique ID of the object. Pixy2 is a versatile device that can be used for various applications or innovative projects.
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Pixy2 can be attached to a dev board that communicates via SPI, I2C, UART, or USB
The Pixy2 camera can be attached to a development board that communicates via SPI, I2C, UART, or USB. Pixy2 has three separate methods of communication. The first method, Serial, includes SPI, I2C, and UART interfaces. The serial interfaces all use a simplified protocol with a small code and memory footprint, and the code is simple to port to different microcontrollers. This is the method that is used for communication with Arduino. Using the serial protocol, Pixy2 sends complete information about what it detects and accepts simple commands for setting the pan/tilt servos.
The second method is USB, which is intended for microcontrollers with more memory resources (RAM and flash). The code for the USB protocol has a larger memory footprint. This is the method used to communicate with the Raspberry Pi and BeagleBone Black, and it is used by PixyMon to stream live video and read/write configuration information.
The third method is SPI with SS, which is the same as the Arduino ICSP SPI except that it includes support for Slave Select through pin 7 (SPI SS). This means that you need to drive SPI SS low before sending/receiving each byte.
The Pixy2 can be used with a pan/tilt kit, which allows it to physically move to aim itself. The pan/tilt kit is not compatible with Pixy for LEGO Mindstorms. The Pixy2 pan-tilt kit is smaller and faster than the original Pixy's pan-tilt kit.
To set up the Pixy2 with a development board, you need to determine the desired communication interface. If your controller is Linux-based and has a USB host port, use libpixyusb2. If your controller doesn't support USB but supports SPI, use SPI. If your controller doesn't support SPI but supports I2C, use that, as it is more flexible than UART. If your controller only supports UART serial, use that.
Once you have determined the communication interface, you can connect the Pixy2 to the development board using the supplied Arduino cable. You can then set up the Pixy2 through the PixyMon Utility, which allows you to view what the Pixy2 sees as either unprocessed or processed video. You can configure the I2C address between 0x54 and 0x57 and set up the color tracking mode to track up to seven unique colored objects.
The default color tracking mode for Pixy2 is Color Signature, but you can also use Color Code Signature, Color and Color Code Signature (Mixed), or ALL to track all color signatures. You can also use the line tracking mode, which outputs the start and end coordinates of the most significant line and detects intersections along the line.
Overall, the Pixy2 camera offers a range of communication interfaces and tracking modes, making it a versatile option for computer vision applications.
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The pan/tilt mechanism is not compatible with Pixy for LEGO Mindstorms
The PixyCam is a small camera that can track coloured objects. It can be used with a pan/tilt kit to physically move and aim itself. The Pixy2 is an upgraded version of the PixyCam, with added features such as line-following capabilities and built-in LED headlights. While Pixy and Pixy2 are compatible with a pan/tilt kit, the mechanism is not compatible with Pixy for LEGO Mindstorms.
There are, however, 3D-printed models and designs available online that can be used to create a pan/tilt mechanism for the Pixy camera and LEGO Mindstorms. These models and designs may require some modification to ensure a proper fit and function. One such modification includes using Gorilla Glue to attach the Pixy camera to a mask and drilling a hole in the bottom of the mask's chin.
Additionally, there are pan/tilt kits available for the Pixy camera that are not specific to LEGO Mindstorms. These kits allow the Pixy camera to move and track objects independently. The kits typically require some assembly and programming to function properly. It is important to note that the base of the Pixy camera may need to be held or attached to something to prevent sliding during movement.
The pan/tilt kits for the Pixy camera offer an entertaining way to explore computer vision and object tracking. Users can experiment with the tracking speed and observe the camera's attempts to centre itself on the tracked object. The camera can be connected to a computer to programme and power it, and it can also be attached to development boards such as Arduino, Raspberry Pi, or BeagleBone.
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