Methods, computer program products and systems for 3D reconstruction

A computer program product comprising a non-transitory computer-readable storage medium having thereon a computer program comprising program instructions, the computer program being loadable into a processor and configured to cause the processor to perform a method for 3D reconstruction by:

• obtaining (S100) a set of images, each image overlapping a region of interest,
• performing (S400) image registration for the set of images, the image registration comprising determining a set of intrinsic and/or extrinsic camera parameters for each image, wherein performing the image registration comprises:
• correlating (S410) each image with a reference 3D data set, the correlating (S410) of each image with the reference 3D data set being arranged to update the intrinsic and/or extrinsic camera parameters for each image, and
• generating (S600) a 3D data set relating to the region of interest using (S610) 3D reconstruction based on the registered images, wherein generating the 3D data set relating to the region of interest comprises:
• generating an initial guess for the 3D data set based on the reference 3D data set;
• determining a search space based on the initial guess and the reference 3D data set, the search space being arranged to limit potential parameters of the 3D data set during subsequent 3D reconstruction;
• and
• 3D reconstructing the 3D data set, the 3D reconstruction starting from the generated initial guess and performed within the determined search space.

A system for 3D reconstruction, the system comprises

• a processor, and
• a memory,
• the memory having stored thereon a computer program comprising program instructions, the computer program being loadable into the processor and configured to cause the processor to perform the method for 3D reconstruction by:
• obtaining a set of images, each image overlapping a region of interest,
• performing image registration for the set of images, the image registration comprising determining a set of intrinsic and/or extrinsic camera parameters for each image, wherein performing the image registration comprises;
• correlating each image with a reference 3D data set, the correlating of each image with the reference 3D data set being arranged to update the intrinsic and/or extrinsic camera parameters for each image, and
• generating a 3D data set relating to the region of interest using 3D reconstruction based on the registered images, wherein generating the 3D data set relating to the region of interest comprises:
• generating an initial guess for the 3D data set based on the reference 3D data set;
• determining a search space based on the initial guess and the reference 3D data set, the search space being arranged to limit potential parameters of the 3D data set during subsequent 3D reconstruction;
• and
• 3D reconstructing the 3D data set, the 3D reconstruction starting from the generated initial guess and performed within the determined search space.