See also Digital Step Edges from Zero-Crossings of Second Directional Derivatives.

*Haralick, R.M.[Robert M.]*,

**Edge and Region Analysis for Digital Image Data**,

*CGIP(12)*, No. 1, January 1980, pp. 60-73.

Elsevier DOI
*Facet Model*.
*Segmentation, Edges*.
*Segmentation, Facet Model*.
Fit a sloped plane to the image region rather than a uniform intensity.

See also Facet Model for Image Data, A.
BibRef
**8001**

*Watson, L.T.[Layne T.]*,
*Laffey, T.J.[Thomas J.]*,
*Haralick, R.M.[Robert M.]*,

**Topographic Classification of Digital Image Intensity Surfaces
Using Generalized Splines and the Discrete Cosine Transform**,

*CVGIP(29)*, No. 2, February 1985, pp. 143-167.

Elsevier DOI
*Primal Sketch*.
BibRef
**8502**

Earlier: A2, A3, A1:

**Topographic Classification of Digital Image Intensity Surfaces**,

*CVWS82*(171-177).
The complete paper on the topographic primal sketch. This refers
to several other related papers. The results are based on first
and second directional derivatives, with splines or the cosine
transform used to estimate the surface.
Proofs in:

See also Topographic Primal Sketch, The.
BibRef

*Shapiro, L.G.*,
*Haralick, R.M.*, and
*Pong, T.C.*,

**The Use of the Facet Model and the Topographic Primal Sketch
in Image Analysis**,

*ACV88*(II 1-46).
BibRef
**8800**

*Pong, T.C.[Ting-Chuen]*,
*Shapiro, L.G.[Linda G.]*,
*Haralick, R.M.[Robert M.]*,

**Shape Estimation from Topographic Primal Sketch**,

*PR(18)*, No. 5, 1985, pp. 333-347.

Elsevier DOI
BibRef
**8500**

Earlier:

**Shape Estimation from Topographic Primal Sketch:
An Initial Feasibility Study**,

*ICPR84*(597-600).
BibRef

*Haralick, R.M.[Robert M.]*,
*Watson, L.T.[Layne T.]*,
*Laffey, T.J.[Thomas J.]*,

**The Topographic Primal Sketch**,

*IJRR(2)*, Spring 1983, pp. 50-72.
BibRef
**8300**

Earlier: A3, A1, A2:

**The Topographic Primal Sketch and its Application to
Passive Navigation**,

*DARPA83*(304-317).
Proof of some of the concepts in

See also Topographic Classification of Digital Image Intensity Surfaces Using Generalized Splines and the Discrete Cosine Transform. Computing ridges and valleys, then using these in the navigation experiment.
BibRef

*Mainguy, Y.*,
*Birch, J.B.*,
*Watson, L.T.*,

**A Robust Variable Order Facet Model For Image Data**,

*MVA(8)*, No. 3, 1995, pp. 141-162.
BibRef
**9500**

Chapter on 3-D Object Description and Computation Techniques, Surfaces, Deformable, View Generation, Video Conferencing continues in

Three-Dimensional Surface Reconstructions .

Last update:May 2, 2021 at 12:04:43