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Getting started

Installing DGtal

These programs depend of DGtal, a library providing tools and algorithms for digital geometry.

You can install this library as follows:

git clone git://github.com/DGtal-team/DGtal.git
mkdir build && cd build && cmake .. && make

Compilation

mkdir build
cd build
cmake .. -DDGtal_DIR=/path/to/DGtal/build
make main

Learn

Compute the signature vectors of all the images of the given database and store them in some file. This program is multithreaded: you can highly reduce the execution time on a multi-core machine.

Basic usage:

./learn --nbthread <number of threads> --input <image database folder> --output <output file>

Classify

Print the probability of the given image to belong to each of the classes, in the order provided by the CSV file.

It requires a file containing the signature vectors of all the images, as computed by the program learn. Consider using the file descriptors.info.

Basic usage:

./classify --classes <classes CSV file> --descriptors <descriptors file> --image <image file>

Distance

Print the distance between the signature vectors of the two given images.

Basic usage:

./distance <image file 1> <image file 2>

Example

# Compute the file descriptors.info using 4 threads
./learn -j 4 -i database -o descriptors.info
# For each class, print the probability that the image apple-3.pgm belongs to it.
./classify -c classes.csv -d descriptors.info -i database/apple-3.pgm