Overview over the principle of hypercentric imaging using lensless digital-holography. The wave field is known across the camera plane x′ and can be reconstructed in the object plane x to yield an image of the object. However, for hypercentric imaging, we numerically apply a virtual aperture with diameter d. The aperture cuts out a part of the spherical wave of each object point and turns it into a ray-like wave field. Upon propagation into the perspective plane, this lets object points further away from the camera shift outwards across the image, as seen from P_A and $P_A^{\text{'}}$. In contrast, object points closer to the camera, on the opposite side of the perspective plane, will appear shifted inwards. This behavior creates the hypercentric perspective.