3D object model reconstruction from 2D images

A system comprising:

• one or more processors configured to perform operations comprising:
• determining a size of an object in an image plane of a camera used to capture an image depicting the object;
• converting the size of the object in the image plane into a pixel size based on a camera sampling density of the camera used to capture the image;
• determining, from the image, a depth of a key point of the object in the image based on the size of the pixel size of the object using similar triangles;
• determining, using the depth of the key point, a three-dimensional position of the key point;
• generating, using a neural network, a three-dimensional representation of the object, the three-dimensional representation comprising a plurality of mesh nodes defined in a coordinate system relative to the key point;
• and
• positioning the three-dimensional representation of the object based at least in part on the three-dimensional position of the key point,
• wherein positioning the three-dimensional representation of the object comprises applying a position dependent rotation to the three-dimensional representation of the object.

A non-transitory computer readable medium comprising computer readable instructions that, when executed by one or more processors, configure the one or more processors to perform operations comprising:

• one or more processors configured to perform operations comprising:
• determining a size of an object in an image plane of a camera used to capture an image depicting the object;
• converting the size of the object in the image plane into a pixel size based on a camera sampling density of the camera used to capture the image;
• determining, from the image, a depth of a key point of the object in the image based on the size of the pixel size of the object using similar triangles;
• determining, using the depth of the key point, a three-dimensional position of the key point;
• generating, using a neural network, a three-dimensional representation of the object, the three-dimensional representation comprising a plurality of mesh nodes defined in a coordinate system relative to the key point;
• and
• positioning the three-dimensional representation of the object based at least in part on the three-dimensional position of the key point,
• wherein positioning the three-dimensional representation of the object comprises applying a position dependent rotation to the three-dimensional representation of the object.