Regardless of whether capturing with your mobile phone or some other camera, here are the most important guidelines for capturing for Mapillary. (Check out our extra tips for walking, cycling or driving as well.)
- The main point when capturing is to keep on moving and to try and hold the camera itself still.
- Mapillary supports images in landscape orientation. Adjust the camera to be level with the horizon (the Mapillary apps have tilt lines on the camera screen to help with that).
- Normally you aim the camera towards the direction of movement, where the road in front of you meets the horizon.
- The ideal environment for a Mapillary sequence is to have the sun behind you, minimal traffic and fewer people about.
- Take many images in one sequence (at least 10, but more is better) and in close proximity to each other (5 m is ideal).
We use a computer vision technology called Structure from Motion (SfM) to create an immersive experience when you're viewing the sequences. SfM works based on overlapping points between different images. If you follow the above tips, your images will have enough overlap and you will end up with seeing something like this.
Here is how to capture different objects.
- Streets and roads. When your want to cover a street, make sure the camera is pointed in the direction of the street. If you have time, first cover one direction and then the other. When that is done, you can orientate the camera left or right to the direction of travel.
- Corners. When walking around corners, it is best to take more images with lots of overlap to create smoother transitions. Selecting manual mode or adjusting the frequency of automatic capture can help achieve this.
- Facades. To capture facades, point the camera to the left or right towards the direction of travel. This works best when the street is wide enough so that large parts of the facades are visible, and you are moving slowly.
- Interesting places. For interesting locations, you can consider panorama mode which provides a nice viewing experience. This is a particularly useful way to capture street intersections, but also for spectacular views.
- Objects. To capture a single focal point such as a statue or a small structure, orbit around it taking pictures at different angles. (In some cases, manual capture mode might be more suitable for this than automatic.)