MultiVision Studio

1. Introduction

MultiVision Studio is a graphical tool developed by ShiMetaPi for hybrid vision cameras (RGB + EVS). It is a multi-function software that supports visualizing, configuring, and analyzing image- and event-based vision data.

No camera?

Go to Downloads — Sample recordings, download a .raw file, and play it back in this tool to experience preview, EVT2→CSV export, and all other features.

2. Driver installation

[Install preparation]

• Make sure the event camera is connected to the computer via a USB3.0 interface.
• Power on the device and wait for the system to recognize the hardware.

[Install driver]

• Run the USB Function Filesystem installer to deploy the driver automatically.
• If the driver does not install automatically, restart the computer and enter disable driver signature enforcement mode:

• Settings → Update & Security → Recovery → Restart now → Troubleshoot → Advanced options → Startup Settings → Disable driver signature enforcement

[Verify installation]

• Open Device Manager and confirm that USB Function Filesystem shows as enabled.

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3. MultiVision Studio features

3-1 Usage notes

The main features of this software are real-time preview of camera raw data, recording & replay, filtering effects, OTA upgrade, SN-code retrieval, plus an EVT2-to-CSV visual-text tool.

3-2 Basic usage

1. Get the MultiVision Studio program

Close antivirus software before extracting.

rktools: system upgrade tool

ffmpeg: audio/video processing tool

MultiVision Studio: graphical tool

2. Application interface

Click the device in the upper-left corner to open the real-time preview, or use the shortcut Ctrl + S.

3. EVS event parameters

raw: raw event count

erc: event count after ERC (event-rate control) limiting filt: event count after filtering

fps: EVS event frame rate

disp: EVS event render frame rate M/S: USB transfer bandwidth

3-3 Recording area

Click "Settings" in the upper-left corner to open recording settings.

Click "Tools — Show/Hide function area" in the upper-left corner to open the function area.

3-3-1 Recording & replay

You can record EVS and APS separately or simultaneously.

APS recording: optionally convert to MP4 or AVI format (requires ffmpeg.exe).

MP4 has no timestamps; AVI carries timestamps — choose according to your needs.

EVS recording: raw data, viewable via the player or after conversion to CSV.

3-3-2 Player replay

Select an EVS (raw) / APS (mp4/avi) file.

3-3-3 Display area

1. Overlay EVS onto APS:

2. Decay rate

Larger value → slower decay → longer afterglow/trail: triggered events stay on the picture longer, suited to observing motion trajectories and motion patterns.

Smaller value → faster decay → shorter afterglow/trail: the picture updates more "cleanly", showing only the most recent events, suited to observing instantaneous changes.

3-4 Event control area

3-4-1 ERC (Event-Rate Control)

Purpose: limits the upper bound of events rendered per frame, preventing the render from freezing when the event volume is too large.

3-4-2 Spatial denoise

Purpose: filters out isolated noise events. Real object motion produces event clusters on neighboring pixels, while sensor noise shows up as isolated single-pixel events.

Parameters:

Parameter	Options	Meaning
Window size	3×3 / 5×5 (default) / 7×7	The neighbor search range; larger is more permissive
Min neighbors	1 / 2 (default) / 3	How many neighbors inside the window count as valid signal

3-4-3 AFK Anti-Flicker

Purpose: suppresses fixed-frequency noise produced by periodic flickering light sources (e.g. PWM-dimmed LEDs). Such sources repeatedly trigger events in the same region at a fixed period; they are invisible to the eye but appear as persistent flicker blocks on EVS.

Off by default, because it is only effective for specific light-source scenarios.

3-4-4 Event trail filter

Purpose: pixel-level temporal filter that removes "trail-redundant events" at high-contrast edges and isolated temporal noise. Runs before AFK and spatial denoise.

Three modes:

Mode	Strategy	Effect
TRAIL (keep flip)	For same-pixel same-polarity events, keep only the first within the time window (a polarity flip is kept immediately)	Cuts the trail, keeps edge changes
STC-keep trail	Check the 3×3 neighborhood for same-polarity events; if present, keep all	Keeps the full motion trail
STC-cut trail	Check the 3×3 neighborhood; if present, keep only one event per polarity per pixel	Keeps only the first contour event

3-5 Exposure / gain control area

Exposure and gain settings for APS.

3-5-1 Exposure mode

Can be set to auto or manual exposure.

Manual exposure: supports adjusting exposure time and analog gain.

3-6 Settings

The settings window can be opened from the upper-left corner.

Includes: recording settings (ffmpeg path, APS/EVS recording save paths), IP settings, EVS frame-rate settings.

3-6-1 Recording settings

3-6-2 IP settings

3-6-2 EVS frame-rate settings

3-7 Tools

3-7-1 EVT2-to-CSV tool

Converts a recorded EVS raw file to CSV to view events.

3-7-2 System upgrade

Select an image; after verification, the upgrade can begin.

3-8 SN code retrieval

From the upper-left "Help — About MultiVision Studio" you can view the machine code.