Prophesee Event-Based Vision Knowledge Center

There is a very obvious display delay when developing our data collection software
While developing our data collection software with five EVK4 cameras, we ran into a display problem. We have contacted the local Prophesee support, and they told us to test the provided sample code (metavision\sdk\cv\samples\metavision_noise_filtering).
Metavision studio crashes without error messages
Hello, Metavision Studio crashes immediately after start, even before the GUI appears. There is no error message produced and seemingly no logging output generated. I am using metavision SDK version 3.1 and a EVK2-4.1 with the latest firmware. Has anybody
ModuleNotFoundError: No module named 'metavision_core'
Hello, I have installed metavision SDK on ubuntu 18.04 successfully, and the Metavision Studio worked well. Besides, I have set the anaconda environment according to the usage https://docs.prophesee.ai/stable/installation/linux.html. However, when I
Filtering the event video
Hi After filtering the raw event video using various filtering algorithms as shown in your code example, is it possible to save the filtered event file as a raw file?
3D visualization of the camera poses
Good morning, I'm working with Show Calibrated Pose after having calibrate my camera and I have a couple of questions: 1. I would as first notice that if I run show_calibrated_poses.py -e /path/intrinsics.json -m it returns an error Traceback (most recent
imu camera calibration
good morning all! I'm trying to create an all-in-one disposable with silky ev cam and lsm9ds1 imu. Can someone please tell me how to create the rototranslation matrix for this complex system for the calibration? Thank you !!
Is it possible to invert the polarity of EVK4 sync_out?
We are designing a synchonization circuit for multiple EVK4 cameras. In our test, the fall edge of the sync_out signal (50ns) is much shorter than the rise edge (~200ns). Is it possible to invert the polarity of sync_out signal by setting the api/registers
Index file created by metavision_raw_info.exe
When executing metavision_raw_info.exe from Metavision Intelligence 3.0.2, an index file named [input_raw_filename].tmp_index is automatically created. I remember this was not the case for older versions, which did not create any additional file each
Daisy Chain Build
Hi, In the synchronization application notes it says: "Daisy Chain is not yet supported natively in current software release. Contact us for more information on how to build it." I am using the OpenEB version of the driver, built for Fedora OS (which
Is there sample code for vibration monitoring about amplitude?
Hello. I want to display vibration monitoring about amplitude at SilkyEvCam(VGA). I found vibration sample code "Vibration estimation". https://docs.prophesee.ai/stable/metavision_sdk/modules/analytics/samples/vibration.html#chapter-sdk-analytics-samples-vibration-estimation
Consume trigger events using the BaseStage/Cam API
Hi, Just wondering if it is possible to access trigger events using the BaseStage::set_consuming_callback() API. In the docs there is only mention of the HAL API for accessing trigger events. Thanks!
Sparse Optical Flow
is there a publication where I can read how the used algorithm for sparse optical flow computation works?
How to produce() for FrameDisplayStage
Hi, I'd like to visualise images outputted by a custom stage. To do that, I'm inheriting from BaseStage and now need to call produce(xxx) appropriately. I saw that the class FrameDisplayStage tries to cast the input to FrameData in the function set_consuming_callback
When to use SDK vs HAL
After reading through the tutorials, it seems to me that many things can be achieved through the HAL API that can also be done through the SDK. For example, opening a camera and adding a callback for events can be done using the HAL (eg HAL Viewer Sample)
EVK4 Gen4.2 bias settings
Hello, I wonder how to interpret the values "bias_diff_on" and "bias_diff_of" and why it is not possible for our setup with EVK Gen4.2 to set both values to 190 and 190. Metavision3.0 allows us to set only 190 and 140. What is background of that behavior?
EVK1 GEN3.1 VGA - Pins "push pull" or "open-collector"
Hello, We want to synchronize a 2D camera with the trigger of an EVK1 GEN3.1 VGA camera. To do this we use the PIN 0 and 1 of the camera as detailed in the following link: https://support.prophesee.ai/portal/en/kb/articles/trigger-in-out We would like
EVK4 Gen4.1 bias settings
Dear Prophesee team, the new bias settings shipped with Metavision 2.3.2 comes with all bias settings in the imx636_CD_standard.bias are set to zero. Additionally, from the EVK4 documentation, there is a printout from the Metavision Intelligence Suite
Access to DominantFrequencyEventsAlgorithm class in Python
Hello, We are working with the program metavision_vibration_estimation.py and we would like to access the DominantFrequencyEventsAlgorithm class of the Analytics module in Python. We would like to redefine the use of the "min_pixel_count" parameter
DVS for Ultra high speed applications (Real time)
Dear Prophesee Team! Problem Statement: I want to process the Raw Event (X, Y, P, T) data with Delta t of 4000uS / 250 FPS in real-time. Any process (slow/fast) inside the main loop shouldn’t affect the input stream of the camera. Below is the main loop
moving between 2 targets
Hello, Using a GEN 3 EVK VGA CD and high speed mirror, we are tracking two objects at 200Hz. We use the trigger-in to mark the movement of the mirror. We try to use the triggers time information to sort the events between the two objects but we remain
RAW Files export with Python
Hello, I would like to export the video stream of the camera in RAW format with a Python code. I have noticed that none of the available ".py" code allows to save the video stream in this format. Have you already implemented this function?
calling set_mode_standalone() in metavision 2.3.2 causes funky device state
Moving from metavision 2.2.2 to 2.3.2 revealed the following issue: When calling set_mode_standalone() the device: 1) stopped giving cd callbacks 2) returned -1 for all bias parameters. How to reproduce: Insert the following line at line 220 in the apps/metavision_viewer.cpp
Controlling EVK1 with LABVIEW
Hello, We were currently using the EVK1 camera from the Windows command prompt. We would like to be able to control it via a LABVIEW environment (call the program, set parameters, start acquisition, output events). Have you already done this? If yes,
Modify "process_to" during execution
Hello, I am currently working on the Python version of metavision_vibration_estimation. When launching the executable, we can specify the argument "process_to" to define the acquisition time. Is it possible to modify the value of this variable during
Is there a way to provide a memory for the driver to write into, with openEB?
We are using openeb sdk, and we added a callback function to acquire the EventCD data like this: cam_ptr->cd().add_callback(cb) In cb, the events are copied from driver's memory to our memory. After getting enough events, we feed them to the next-step
Min contrast sensitivity of VGA CIS sensor (EVK3-VGA)
Hi! We recently acquired a EVK3-VGA and I have a question about its minimal contrast sensitivity. I am wondering what the minimal contrast sensitivity this sensor could achieve? I found there are different numbers (12% and 25%) in three references (please
Error ‘Failed to load module “canberra-gtk-module”’ when launching metavision_viewer
Using Metavision Intelligence 2.3.1, I get the error ‘Failed to load module “canberra-gtk-module”' on Ubuntu when launching metavision_viewer. How can I fix this?
What kind of extension USB cable can I use for my evk?
The cable delivered with the camera is too short for my usage but using a longer one is not reliable and my EVK is not always working properly.

As a Prophesee customer, join the community conversation.
Request your free access today.

Most Discussed Topics
IMX636 - Anti Flicker Filter (AFK) - Problem
Hello, I am currently working with the IMX636 camera and I am trying to suppress the events generated by the pixels of a computer monitor (60 Hz). My goal is to use the AFK (Anti-Flicker) filter to remove this flickering. To do this, I modified the camera
Reconstructing Boot Sequence for GENX320
Dear Community, i am trying to use the GENX320 starter Kit on an FPGA, which is why I want to re-construct the boot-up sequence for the MIPI EVT2.1 stream using I2C from the 15-pin adapter. I tried to copy the signals from the Linux drivers (https://github.com/prophesee-ai/linux-sensor-drivers),
Separting the sensor module from the CCAM adapter
I need to mount the EVK3 (VGA) sensor to a cage-mount system. The simplest way I can think of to do this is to separate the sensor and the CCAM adapter board and connect them with a flexible cable. Does any such cable exist?
EVK4 HD Calibration result
Hello, i'm new to event camera and i followed most of the tutorial from ur documentation in order to do a good biases tuning and an intrinsec calibration. I used the metavision calibration pipeline with the chessboard pattern and i manage to get result
Using IMX636 Metavision Starter Kit on KV260 Ubuntu
I have a project where we are trying to record with multiple cameras, including the IMX636 Metavision Starter Kit for the Kria KV260 board. The other cameras have been implemented on the Kria KV260 board, but with the Ubuntu image installed on it. We

Prophesee Event-Based Vision Knowledge Center

There is a very obvious display delay when developing our data collection software

Metavision studio crashes without error messages

ModuleNotFoundError: No module named 'metavision_core'

Filtering the event video

3D visualization of the camera poses

imu camera calibration

Is it possible to invert the polarity of EVK4 sync_out?

Index file created by metavision_raw_info.exe

Daisy Chain Build

Is there sample code for vibration monitoring about amplitude?

Consume trigger events using the BaseStage/Cam API

Sparse Optical Flow

How to produce() for FrameDisplayStage

When to use SDK vs HAL

EVK4 Gen4.2 bias settings

EVK1 GEN3.1 VGA - Pins "push pull" or "open-collector"

EVK4 Gen4.1 bias settings

Access to DominantFrequencyEventsAlgorithm class in Python

DVS for Ultra high speed applications (Real time)

moving between 2 targets

RAW Files export with Python

calling set_mode_standalone() in metavision 2.3.2 causes funky device state

Controlling EVK1 with LABVIEW

Modify "process_to" during execution

Is there a way to provide a memory for the driver to write into, with openEB?

Min contrast sensitivity of VGA CIS sensor (EVK3-VGA)

Error ‘Failed to load module “canberra-gtk-module”’ when launching metavision_viewer

What kind of extension USB cable can I use for my evk?

Most Discussed Topics

IMX636 - Anti Flicker Filter (AFK) - Problem

Reconstructing Boot Sequence for GENX320

Separting the sensor module from the CCAM adapter

EVK4 HD Calibration result

Using IMX636 Metavision Starter Kit on KV260 Ubuntu