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VPixx Online Classroom and Library

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VPixx Online Classroom and Library

Main

[VPixx Main Site]
[Scientist Portal Access]

Main

Introductory Topics

The Logic of VPixx Hardware Control

A centralized I/O hub
Register writes and updates
Precision timekeeping with GetTime and markers
Configuring inputs and outputs with schedules
Example: A simple reaction time task

Using VPixx Hardware with PsychoPy

Choosing the Right VIEWPixx

Why replace a CRT monitor?
LCD Technology
Data I/O and synchronization
Side-by-side comparison

Synchronization Strategies for Multimodal Neuroscience

Special Features

High-Bit-Depth Video Modes

Introduction to Bit Depth and Colour Lookup Tables (CLUTs)
L48: High Bit Depth Colour and Full Resolution, Limited Colour Space
M16: 16-bit greyscale and limited colour, full resolution
C48: Wide Range, High Bit Depth Colour

Sending and Receiving Analog Signals with VPixx Hardware

Generating two tones using the DAC schedule
Recording an incoming analog signal

Sending Triggers with Pixel Mode

Using Pixel Sync for Stimulus-Accurate Timing

Example: Sending a digital trigger on Pixel Sync
Troubleshooting Pixel Sync

Record Response Times With a RESPONSEPixx Button Box

Construction and functionality of the RESPONSEPixx
Perform basic interactions with your data acquisition device
Record and use a digital input log
Restrict recording to specific button presses and cue participants to valid response choices

Forwarding RESPONSEPixx Button Activity to a Third-Party Receiver

Eye Tracking

Introduction to Eye Tracking with the TRACKPixx3

Principles of TRACKPixx3 operation
The TRACKPixx3 buffer
A simple free viewing task in MATLAB

TRACKPixx3 Calibration Walkthrough

TRACKPixx3 calibration and data collection routine in PsychoPy Builder
TRACKPixx3 calibration and data collection routine in Python IDE
TRACKPixx3 calibration and data collection routine in LabMaestro

Common Eye Tracking Problems and How to Solve Them
Implementing a Real-Time Gaze Follower on the Console
Configuring the TRACKPixx3 Analog Output
Visualizing Gaze Data
Checking if Fixation is Inside a Region of Interest

PROPixx Projection System

Tips for Positioning your Projector and Screen
Adjusting PROPixx Brightness

PROPixx Projection Geometry and System Configuration

Image Dimensions
Rear and Front Projection Screens
Lens Shift

PROPixx High Speed Projection Modes

Real time refresh rates
Quad 4x: 480 Hz colour, half resolution
Grey720: 720Hz greyscale, full resolution
Quad12x: 1440Hz greyscale, half resolution

3D Projection with the PROPixx and 3D Polarizer
Temporal Characteristics of the PROPixx DLP Projector
Rapid Invisible Frequency Tagging (RIFT) using the PROPixx 1440 Hz mode

VIEWPixx /3D

3D Stimulus Presentation with the VIEWPixx /3D
Measuring Pixel Behaviour and Temporal Characteristics of the VIEWPixx /3D

Troubleshooting and Support

What is Pixel Identity Passthrough?
GPU Recommendations for VPixx Displays and I/O Hardware
A Scientist's Guide to Frame Dropping
Diagnosing and Disabling Dithering in the Graphics Pipeline
Diagnosing Display Issues on the PROPixx Projector

Cleaning and Disinfecting VPixx Hardware

Video I/O Hubs
PROPixx Projector
CRT Replacement Monitors
Projection Screens and Mirrors
Eye Trackers
SOUNDPixx Audio System
Other Accessories

Gamma-Correct the Luminance of a Display

Automate luminance measurements and plot the results
Estimate gamma
Generate and apply a gamma-correction CLUT
Using the gamma-correction CLUT in your experiments

VSS Keynote Lectures

VSS2021: Whatever works: Celebrating diversity in brain scaling and evolution
VSS2022: Coordinate frames and shape perception in neural nets
VSS2023: Creating, (Mis)using, and Detecting Deep Fakes

Presentations by VPixx Staff

Advanced vision research paradigms with the PROPixx high refresh rate projector (V-VSS 2020)
High speed eye tracking in vision science: TRACKPixx3 technology and applications (V-VSS 2020)
Timing and synchronization in gaze-contingent displays and latency-sensitive research paradigms (V-VSS 2020)

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Introductory Topics

The VOCALs are great for getting started with VPixx Hardware.

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The Logic of VPixx Hardware Control
Using VPixx Hardware with PsychoPy
Choosing the Right VIEWPixx
Synchronization Strategies for Multimodal Neuroscience

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