libsgm's Introduction

libSGM

A CUDA implementation performing Semi-Global Matching.

Introduction

libSGM is library that implements in CUDA the Semi-Global Matching algorithm.
From a pair of appropriately calibrated input images, we can obtain the disparity map.

Features

Because it uses CUDA, we can compute the disparity map at high speed.

Requirements

libSGM needs CUDA (compute capabilities >= 3.0) to be installed.
Moreover, to build the sample, we need the following libraries:

OpenCV
OpenGL
GLFW3
GLEW

Build Instructions

$ git clone https://github.com/fixstars-jp/libSGM.git
$ cd libSGM
$ mkdir build
$ cd build
$ cmake ../
$ make

Sample Execution

$ pwd
.../libSGM
$ cd build
$ cd sample/movie/
$ ./stereo_movie <left image path format> <right image path format> <disparity> <frame count>
left image path format: the format used for the file paths to the left input images
right image path format: the format used for the file paths to the right input images
disparity: the maximum number of disparities (optional)
frame count: the total number of images (optional)

"disparity" and "frame count" are optional. By default, they are 64 and 100, respectively.

Next, we explain the meaning of the "left image path format" and "right image path format".
When provided with the following set of files, we should pass the "path formats" given below.

left_image_0000.pgm
left_image_0001.pgm
left_image_0002.pgm
left_image_0003.pgm
...

right_image_0000.pgm
right_image_0001.pgm
right_image_0002.pgm
right_image_0003.pgm

$ ./stereo_movie left_image_%04d.pgm right_image_%04d.pgm

The sample movie images available at http://www.6d-vision.com/scene-labeling under "Daimler Urban Scene Segmentation Benchmark Dataset" are used to test the software.