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cameras

Although Project Babble is compatible with any camera, the quality of tracking can vary significantly based on several factors, including lighting, camera angle, framing, and field of view. If you plan to build your own setup using custom components, keep the following example of a “good image” in mind:

Characteristics of a Good Image:​

  • Even Lighting: Ensure the face is well-lit with consistent, even lighting that doesn’t fluctuate due to environmental factors. This can be achieved using visible or infrared (IR) light.
  • Balanced Field of View: Aim for a field of view between 120° and 130°, with minimal distortion.
  • Proper Camera Alignment: The camera should be positioned horizontally in line with the mouth.
  • Minimal Artifacts: The image should have little to no noise, strobing, or other artifacts that could interfere with tracking.

We recommend using ESP32-based OpenIRIS trackers with lenses offering a 120° to 160° field of view.

Camera Recommendations:​

  1. OV2640 160° FOV IR / Night Version (850nm)

    • Ideal for use with infrared lighting; firmware cropping is recommended.
    • Buy on AliExpress

    Alternatively:

  2. OV2640 120° FOV (Requires Manual IR Filter Removal)

    • A solid choice, but you'll need to remove the IR filter if using infrared lighting.
    • Buy on AliExpress

    Alternatively:

  3. OV2640 130° FOV (Requires Manual IR Filter Removal)

    • Finding this option may require some searching, as listings are common but not always available.

    Amazon Alternative:

    • Note that you will need to manually remove the IR filter for this option.

IR Filter Removal Warning:​

If you choose to remove the IR filter from your camera, please wear eye protection as the filter may shatter during the process. You can follow this tutorial for guidance: IR Filter Removal Tutorial

Additional Considerations:​

  • Some mounts, like Physics Dude's Index mount, may require a camera with a longer connector than the standard short one. Be sure to check the connector length when selecting a camera to order.