kerautret / accv2016dgptutorial

ACCV 2016 Tutorial on Digital Geometry Processing : Extracting High Quality Geometric Features

ACCV2016DGPTutorial

ACCV 2016 Tutorial on Digital Geometry Processing : Extracting High Quality Geometric Features

Slides of the presentation:

• slides part 1
• slides part 2

Linux/MacOs build:

Windows build:

Requires

Before starting the tutorial you need to have the following dependancies:

• CMake >= 2.6
• Boost >= 1.46 (modules: program_options)
• DGtal

Simple Installation of the DGtal Library

To install DGtal follows theses steps: (more details available on the official site)

• Clone the current version of DGtal: (or get the archive from a given USB key):

    git clone [email protected]:DGtal-team/DGtal.git
  

• Then recopy the following command lines:

  • cd DGtal;
  • mkdir build; cd build
  • cmake .. -DBUILD_EXAMPLES=FALSE -DBUILD_TESTING=FALSE
  • make

• Alternatively you can use ccmake and select in the interface the associated options.

List of exercices:

To generate and compile this project you can do:

• git clone [email protected]:kerautret/ACCV2016DGPTutorial.git
• cd ACCV2016DGPTutorial.git; mkdir build; cd build
• cmake .. -DDGtal_DIR=/YOUR_DGtalDIR/build
• make

If you was use an IDLE like xCode you can add the option to generate an xCode project with: -GXcode

Tuto 1: basic DGTal (see instructions)

The objective of this first exercise is to read an input contour and display it with Board2D.

You should obtain something like that:

Tuto 2: level set contours (see instructions)

The aim of this exercise is to extract the 2D level sets contours from a gray scale image and an given selected interval.

You should obtain something like that:

Tuto 3: extracting curvature from DCA (see instructions)

In this tutorial exercice, we show a simple curvature extraction defined from the recognition of Digital Circular Arcs.

You should obtain something like that:

Tuto 4: computing Alpha Thick Segment (see instructions)

In this exercise we simply apply the recognition of a maximal Alpha Thick Segment.

You should obtain something like that:

Tuto 5: Tangential Cover (see instructions)

Here we explore the helper functions of the SegmentComputerUtils class DGtal/geometry/curves/SegmentComputerUtils.h in order to compute all the maximal AlphaThickSegment covering a given point.

You should obtain something like that:

Tuto 6: Meaningful Thickness (see instructions)

The main objective is to compute the Meaningful Thickness for a given point (a) and then for all the contour points (b).

You should obtain something like that:

(a)	(b)