Dashcam Tilt

Learn how to train AI to grade the quality of a device's tilt angle

Device Tilt example

Well-mounted devices are critical for the Hivemapper community to generate high-quality map data. Based on input from a decentralized community of AI Trainers, contributors with better tilt angles receive a better reputation score, resulting in better rewards. Contributors with poor-quality tilt angles receive worse rewards, and in extreme cases, receive no rewards at all.

In this game, you must answer only one question: did the driver angle their device correctly?

Game Contents

You will be presented with the following information:

1. A sample image from the device being rated

2. An overlay of lines showing what is and isn’t allowed

   1. The top line will show the highest point the ground can be visible in the image

   2. The bottom line will show the lowest point where sky can be visible in the image

You have three choices:

1. “Good” for a device that is angled correctly

2. “Bad” for a device that is angled incorrectly

3. “Not sure” if you don’t know how to answer for this device

Please remember: you are only grading the tilt angle of the device. You are not grading the quality of the image, the weather, or if there are objects inside the vehicle or part of the vehicle that are blocking the device. You should select “Good” as long as the device is tilted correctly, even if the windshield is covered in rain or the road features are difficult to see due to glare from the sun.

You are never penalized (or rewarded) for selecting “not sure.” Do not hesitate to use it, to help ensure that contributors are graded fairly for the quality of their mount.

What Makes a Device Tilt Good?

• ✅ There is not too much ground visible in the image
• ✅ The horizon is roughly in the center of the image (not including trees, mountains, buildings, etc.)
• ✅ There is not too much sky visible in the image

Let’s take a look at some examples of good Dashcam Tilt imagery:

Good Device Tilt Examples

✅ Forward-facing device with a level horizon

✅ Forward-facing device that has almost too much ground but is still within the lines

✅Side-facing device with a level horizon

✅Forward-facing device with level horizon, even if trees or mountains are above the top line

What Makes a Device Tilt Bad?

• ❌ There is too much ground visible in the image
• ❌ The horizon is too high or too low in the image (not including trees, mountains, buildings, etc.)
• ❌ There is too much sky visible in the image

Let’s take a look at some examples of bad Tilt Angle imagery:

Bad Device Tilt Examples

❌ Device with ground angled above the top line

❌ Device with too much sky (Sky is visible below the low line)

What Doesn’t Make a Device Tilt Bad?

Do not select “bad” for an image just because one of the following is true. The Dashcam Tilt may be bad for other reasons, but these alone are not enough to grade a mount as bad:

• Trees or mountains over the horizon line

• Device facing the side instead of the front

• Device being blocked by an object within or attached to the vehicle

• Raindrops, glare, or other temporary objects visible by the device

• Trees, buildings, or other objects directly outside the vehicle that are close to the device

✅Device facing the side instead of the front