λvue SDK User Manual
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The λvue Sample GUI User Manual provides an easy way to build a GUI application to use λvue SDK on Linux, Mac and Windows.

The λvue Sample GUI User Manual is still under construction, so the content of this document may change over time.

1. Introduction

This part gives you an overview of the technologies described in this guide.

1.1. What is λ·vue

Quanta Research Institute and MIT researchers collaborated to develop λvue that amplifies color changes and movements in video that are invisible to the naked eye. The λvue allows you to 'see' a person’s pulse by magnifying the color of the person’s skin, and to 'see' a person breathing by amplifying the subtle changes in movement.

Magnification enhances small movements in the source video. It works best for periodic changes such as breathing or pulse. This technique is designed to expose very small changes when the rest of the image is very still.

Quanta Research Institute has created this software development kit so that you can experiment with the λvue on your own videos and webcam.

For more information on the technology, please contact QRI ( info@lambda.qrilab.com ).

1.2. About this guide

This guide covers the basic instructions needed to build a GUI application to use λvue SDK.

These instructions are intended to be used on λvue SDK installed machine.

2. Linux

2.1. System Requirements

The λvue sample GUI relies on tight integration with the host development environment, including the host compiler and C runtime libraries, and is therefore only supported on distribution versions that have been qualified for this λvue SDK.

2.1.1. Minimum System Requirements

  • 2 GHz or faster 64-bit (x64) processor

  • 4 GB RAM

  • 2 GB available hard disk space

Laptop which has both Intel and NVIDIA graphics cards might have some issues of extension "GLX" missing on display

2.1.2. Environment Tested

  • Ubuntu 12.04 64-bit

  • Qt 5.5.0 for Linux 64-bit

2.2. Qt Installation

2.2.1. Ubuntu

We recommend to use the Qt 5.5.0 for Linux 64-bit .

  1. Download the Qt 5.5.0 for Linux 64-bit installer .

  2. Change mode of the installer and launch it with the steps below: 

    chmod +x qt-opensource-linux-x64-5.5.0-2.run
sudo ./qt-opensource-linux-x64-5.5.0-2.run

  3. Follow the instructions to finish installation

2.3. Third-praty Libraries Installation

2.3.1. Ubuntu

  1. Please follow the steps below to install third-party libraries: 

    sudo apt-get install libglu1-mesa-dev libconfig++8-dev

2.4. Build λvue Sample GUI Application

2.4.1. Ubuntu

  1. Download GUI Sample (All Platform) from the λvue webiste

  2. Decompress the tarball

  3. Launch Qt Creator from the Dash Home

  4. In the Welcome tab, click the Open Project button

  5. Open the GekoQt.pro which located in the LambdaVueGUI directory

  6. Click the Configure Project button

  7. Select Build from the toolbar and click the Build All

The builds should produce no error message. The resulting binary will appear under the same directory of GekoQt.pro called LambdaVueGUI .

Once you compile finished, you can download our sample video from following URL and use this video to test λvue sample GUI by double click the resulting binary LambdaVueGUI or by typing following at the command line : 

./LambdaVueGUI

3. Windows

3.1. System Requirements

The λvue sample GUI relies on tight integration with the host development environment, including the host compiler and C runtime libraries, and is therefore only supported on distribution versions that have been qualified for this λvue SDK.

3.1.1. Minimum System Requirements

  • 2 GHz or faster 64-bit (x64) processor

  • 4 GB RAM

  • 2 GB available hard disk space

3.1.2. Environment Tested

  • Windows 7 32-bit / 64-bit

  • Qt 5.4.2/5.2.1 with MinGW and OpenGL

    In Windows system, you need to build with Qt, MinGW and OpenGL and it can run on 64-bit environment.

3.2. Qt Installation

We recommend to use the Qt 5.4.2 with MinGW and OpenGL or Qt 5.2.1 with MinGW and OpenGL .

  1. Download the Qt 5.4.2 with MinGW and OpenGL or Qt 5.2.1 with MinGW and OpenGL .

  2. Double click on the downloaded file

  3. Follow the instructions to finish installation

3.3. Build λvue Sample GUI Application

  1. Download GUI Sample (All Platform) from the λvue webiste

  2. Decompress the tarball

  3. Copy dll files listed below from Qt/MinGW installation path to the LambdaVueGUI directory:

    The dll files would located in a path like C:\Qt\Qt5.4.2\5.4.2\mingw49_32\bin

    • icuin*.dll

    • icuuc*.dll

    • icudt*.dll

    • libgcc_s_dw2-1.dll

    • libstdc++-6.dll

    • libwinpthread-1.dll

    • Qt5Core.dll

    • Qt5Gui.dll

    • Qt5OpenGL.dll

    • Qt5Widgets.dll

  4. Launch Qt Creator from the Start menu

  5. In the Welcome tab, click the Open Project button

  6. Open the GekoQt.pro which located in the LambdaVueGUI directory

  7. Click the Configure Project button

    The default installation path of LambdaVue SDK is C:\LambdaVueSDK . If you have changed the installation path, please remember to modify your SDK_ROOT in line 23 of your Geko.pri.

  8. Select Build from the toolbar and click the Build All

The builds should produce no error message. The resulting binaries will appear under the same directory of GekoQt.pro called LambdaVueGUI.exe .

Once you compile finished, you can download our sample video from following URL and use this video to test λvue sample GUI by double click on the LambdaVueGUI.exe .

4. Mac

4.1. System Requirements

The λvue sample GUI relies on tight integration with the host development environment, including the host compiler and C runtime libraries, and is therefore only supported on distribution versions that have been qualified for this λvue SDK.

4.1.1. Minimum System Requirements

  • 2 GHz or faster Intel-based processor

  • 4 GB RAM

  • 2 GB available hard disk space

4.1.2. Environment Tested

  • Mac OS X 10.9 or later

  • Xcode

    Before you install Qt, you need install Xcode first. You can download Xcode from App Store. But it may require you to use the newest version of Mac OS X.

  • Qt 5.5.0 for Mac

4.2. Qt Installation

We recommend to use the Qt 5.5.0 for Mac .

  1. Download the Qt 5.5.0 for Mac installer .

  2. Follow the instructions to finish installation

4.3. Build λvue Sample GUI Application

  1. Download GUI Sample (All Platform) from the λvue webiste

  2. Decompress the tarball

  3. Launch Qt Creator from directory where you installed the Qt.

  4. In the Welcome tab, click the Open Project button

  5. Open the GekoQt.pro which located in the LambdaVueGUI directory

  6. Click the Configure Project button

  7. Select Build from the toolbar and click the Build All

The builds should produce no error message. The resulting binaries will appear under the same directory of GekoQt.pro called LambdaVueGUI .

Double click the LambdaVueGUI to open the sample application.

Once you compile done, you can download our sample video from following URL and use this video to test λvue sample GUI