Semi-3-D resistivity monitoring for groundwater recharge tests using 2-D difference inversions

ESINVM 3 D : A 3 D resistivity inversion package

We have developed an open source 3D, MATLAB based, resistivity inversion package. The forward solution to the governing partial differential equation is efficiently computed using a second-order finite volume discretization coupled with a preconditioned, biconjugate, stabilized gradient algorithm. Using the analytical solution to a potential field in a homogeneous half space, we evaluate the ac...

Automating Seismic Waveform Analysis For Full 3-D Waveform Inversions

Matching of 3-d Curves Using Semi-diierential Invariants Matching of 3-d Curves Using Semi-diierential Invariants

Reference 1] Tomm a s Pajdla and Luc Van Gool. Matching of 3-D curves using semi-diierential invariants. Abstract A method for matching 3-D curves under Euclidean motions is presented. Our approach uses a semi-diierential invariant description requiring only rst derivatives and one reference point, thus avoiding the computation of high order derivatives. A novel curve similarity measure buildin...

Recognizing 3-D Objects Using 2-D Images

To visually recognize objects, we adopt the strategy of forming groups of image features with a bottom-up process, and then using these groups to index into a data base to nd all of the matching groups of model features. This approach reduces the computation needed for recognition, since we only consider groups of model features that can account for these relatively large chunks of the image. T...

Matching 2 D & 3 D Articulated Shapes using Eccentricity

Shape matching should be invariant to the typical intra-class deformations present in nature. The majority of shape descriptors are quite complex and not invariant to the deformation or articulation of object parts. Geodesic distances computed over a 2D or 3D shape are articulation insensitive. The eccentricity transform considers the length of the longest geodesics. It is robust with respect t...