Systems, methods, and apparatuses for stereoscopic imaging

A method to calibrate an omnidirectional stereo camera apparatus, the omnidirectional stereo camera apparatus comprising a first convex mirror and a first camera disposed behind the first convex mirror, a second convex mirror and a second camera disposed behind the second convex mirror, the first convex mirror and the second convex mirror being arranged such that a first mirrored surface of the first convex mirror and a second mirrored surface of the second convex mirror face each other, wherein the first camera captures imagery reflected off the second convex mirror and the second camera captures imagery reflected off the first convex mirror, the method being implemented in a computer system including one or more physical processors and storage media storing machine-readable instructions, the method comprising:

• estimating a first system model, the first system model comprising estimations of one or more of a first shape of the first convex mirror, a first position of the first convex mirror, a second shape of the second convex mirror, a second position of the second convex mirror, a third position of the first camera, or a fourth position of the second camera;
• obtaining imagery captured by the first camera and the second camera depicting a reference object, the reference object being positioned in three-dimensional space adjacent the omnidirectional stereo camera, the imagery including a first image comprising a first representation of the reference object captured by the first camera and a second image comprising a second representation of the reference object captured by the second camera;
• determining first position information corresponding to the first representation of the reference object in the first image and second position information corresponding to the second representation of the reference object in the second image;
• estimating a reconstruction of the reference object based on the first system model, the first position information, and the second position information;
• reprojecting the reconstruction of the reference object onto image planes, such that the reconstruction of the reference object is reprojected onto a first plane and a second plane;
• determining third position information corresponding to the reprojected reference object in the first plane and fourth position information corresponding to the reprojected reference object in the second plane;
• and
• updating the system model based on the reprojections, such that the first system model is updated based on one or both of a first difference between the first position information and the third position information, or a second difference between the second position information and the fourth position information.