I see. Maybe it is indeed not a good idea to capture with a normal phone. But we can of course not compete with for example Google streetview and Cyclomedia their quality and equipement. Of course, you want the best images for Mapillary but you can’t expect the best quality.
I have to note that also camera’s mounted on cars can produce some low quality image. So stating that using a bicycle is not good is not completely true in my opinion. If you have a stable camera and you can cycle straight then you can also produce good quality images.