VPixx Online Classroom And Library (VOCAL)
VOCAL is a collection of online tutorials created by VPixx staff and contributors. VOCAL aims to help researchers learn about VPixx device functionality and how to optimize it for their research. Code examples and snippets are provided throughout.
Modules with the Guide tag include general explanations of device features, while the Project tag means the module includes step-by-step instructions for creating a simple experiment in MATLAB or Python. For more information, click on some of the modules below.
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Frequently Asked Questions
Popular questions about hardware and software, answered. Includes a general troubleshooting guide for common problems encountered during setup and testing.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
Diagnosing and Disabling Dithering in the Graphics Pipeline
A basic guide to dithering, how to diagnose dithering in your graphics pipeline, and how to disable it for error-free synchronization.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
High-Bit-Depth Grayscale with M16 Video Mode
Part one of a series on the special high-bit-depth video modes available with VPixx hardware. M16 offers high-bit-depth, full-resolution grayscale with colour overlay options.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
PROPixx Projection Geometry and System Configuration
The PROPixx projector is our most versatile visual stimulation system. In this guide, we introduce several important notions that influence the design of your research space and the validation of your desired projection geometry. This guide covers the principles which guide the system configuration, including image dimensions, lens choice, type of projection, and covers certain specialized applications.
Contributed by: Dr. Sophie Kenny, VPixx Technologies
Timing and Synchronization in Gaze-Contingent Displays and Latency-Sensitive Research Paradigms (V-VSS 2020)
This talk was presented by Dr. Sophie Kenny at the first Virtual Meeting of the Vision Sciences Society (V-VSS) on June 22nd, 2020.
Contributed by: Dr. Sophie Kenny, VPixx Technologies
High Speed Eye Tracking in Vision Science: TRACKPixx3 Technology and Applications (V-VSS 2020)
This talk was presented by Dr. Lindsey Fraser at the first Virtual Meeting of the Vision Sciences Society (V-VSS) on June 21st, 2020.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
Advanced Vision Research Paradigms With the PROPixx High Refresh Rate Projector (V-VSS 2020)
This talk was presented by Dr. Sophie Kenny at the first Virtual Meeting of the Vision Sciences Society (V-VSS) on June 20th, 2020.
Contributed by: Dr. Sophie Kenny, VPixx Technologies
Tools for Experiment Creation (Virtual VSS 2020)
This talk was created by Lindsey Fraser as part of our exhibitor page at the 2020 Virtual meeting of the Vision Sciences Society (V-VSS).
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
Choosing the Right VIEWPixx
A side-by-side comparison of our three VIEWPixx CRT replacement monitors, with tips for choosing the best model for your research.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
Introduction to the LabMaestro Simulator
An introduction to the LabMaestro Simulator, a hardware simulator for programming and testing experiments without using VPixx hardware tools.
This page will be updated regularly as more features become available.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
High Refresh Rate Displays in Neuroscience (Neuromatch 2.0)
A recording of our presentation at Neuromatch 2.0 on May 27, 2020, on state-of-the-art applications of 1440 Hz displays in neuroscience.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
Record Response Times With a RESPONSEPixx Button Box
Calculate response times with respect to the video refresh of a visual stimulus using the RESPONSEPixx and MATLAB/Psychtoolbox.
Contributed by: Dr. Sophie Kenny, VPixx Technologies
Gamma-Correct the Luminance of a Display
Sample the luminance of any display using an X-Rite photometer or colorimeter. Calculate the gamma value that characterizes the non-linearity of your display. Generate and apply the gamma-correction color lookup table that will linearize its luminance.
Contributed by: Dr. Sophie Kenny, VPixx Technologies
Visualizing Gaze Data
The TRACKPixx3 data format and automatic event flagging make visualizing gaze data easy. This project shows how to plot raw eye traces, heat maps, and fixation and saccade events for a single trial. Sample data is provided.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
Sending Triggers with Pixel Mode
Use the top leftmost pixel on your display to send custom digital TTL triggers synchronized to frame onset
Contributed by: Dr. Lindsey Fraser & Dr. Sophie Kenny, VPixx Technologies
Introduction to Eye Tracking with the TRACKPixx3
This project explores the data output of the TRACKPixx3. Includes code and sample data.
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
Introduction to Registers and Schedules
An introduction to two of the key synchronization features of VPixx hardware, with code examples
Contributed by: Dr. Lindsey Fraser, VPixx Technologies
