Abstract
rviodel reconstruction using photoconsistency refers to a method that creates a photohull,
an approximate computer model, using multiple calibrated camera views of an object. The
term photoconsistency refers to the concept that is used to calculate the photohull from the
camera views. A computer model surface is considered photoconsistent if the appearance of
that surface agrees with the appearance of the surface of the real world object from all camera
viewpoints.
This thesis presents the work done in implementing some concepts and approaches described
in the literature. A photoconsistent voxel b&':>ed method was used to generate the photohull.
An algorithm b&':>ed on this method calculates the geometry of the visual hull by removing
inconsistent voxels from a initial spherical volume until the resultant appearance of the volume
is consistent with all the camera views. A photo consistency cost function is used to determine
the consistency of a voxel. This cost function is based on the colours of the pixels of the camera
views that correspond to the portion of the surface that a particular voxel is representing.
The primary cost function used in this thesis is the maximum RMS error between the colour
of the voxel, determined by the mean of all the pixel colours from all camera views that
can see the voxel, and the pixel colours obtained from each camera view. A threshold is
used to determine whether the photo consistency error of a voxel indicates if it is consistent or
inconsistent. An estimation algorithm is used to determine an approximation to the threshold
that would correspond to the best model reconstruction results.
The accuracy of the constructed photohull is determined by comparing a rendering of the
obtained photohull and a camera image that was not used in the reconstruction process. A
silhouette is used to remove background from the images.
Joubert, K (2021). 3D model reconstruction using photo consistency. Afribary. Retrieved from https://tracking.afribary.com/works/3d-model-reconstruction-using-photo-consistency
Joubert, Kirk "3D model reconstruction using photo consistency" Afribary. Afribary, 15 May. 2021, https://tracking.afribary.com/works/3d-model-reconstruction-using-photo-consistency. Accessed 10 Nov. 2024.
Joubert, Kirk . "3D model reconstruction using photo consistency". Afribary, Afribary, 15 May. 2021. Web. 10 Nov. 2024. < https://tracking.afribary.com/works/3d-model-reconstruction-using-photo-consistency >.
Joubert, Kirk . "3D model reconstruction using photo consistency" Afribary (2021). Accessed November 10, 2024. https://tracking.afribary.com/works/3d-model-reconstruction-using-photo-consistency