No module named 'metavision_sdk_base_paths_internal'
Hi! When I tried to run the python tutorials, there is a problem: No module named 'metavision_sdk_base_paths_internal'. Please see the attached photo below: I found some related files but they are not named exactly the same with the module above: Could
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
Xorg blank screen issue: Kria + IMX636
I am trying to run the kv260-psee application by using the HDMI connected between Kria and a display monitor. Following the instructions at https://docs.prophesee.ai/amd-kria-starter-kit/application/app_deployment.html I could power on the sensor but
Frequency / bias value matching table
Hi, I just found this table that relates bias_hpf and bias_fo in terms of high-pass cut-off frequency and Low-pass cut-off frequency but this is for GEN 3.1. Can you please share the table or the graphs (https://support.prophesee.ai/portal/en/kb/articles/bias-tuning-flow)
Using the IMX636 + MIPI CSI-2 with Jetson Orin instead of AMD Kria
Does anyone have experience making this work? - Device tree looks like it's available here: https://github.com/prophesee-ai/linux-sensor-drivers - I'm curious if there's a driver available for the Jetson, and if not, if anybody has tips to write one for
Stereo Calibration
I am trying to add a stage to a stereo calibration pipeline this stage must receive the flow of two streams of the events coming from two Prophesee cameras and the stage must filter them and lets go only the events coming from both cameras having the
How to read .h5 file format in Metavision 4.4.0
Hello, I am trying to read the dataset DSEC (Download – DSEC (uzh.ch)) with the Metavision 4.4.0. The dataset is supposed to be from Prophesee Gen3, and the file format provided is .h5. From my understanding .h5 and .hdf5 have the same porperties, and
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)
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
Duplicate events in the event stream
Hi, I'm using EVK4 HD for event data collection. I find that there are several duplicate cd events (i.e. the same events in pixel location, timestamp and polarity) in the event stream. Are these duplicate events redundant, which I can remove without any
About the sensitivity of the sensor under different lighting conditions
I have a question regarding the reduced sensitivity of sensors under low light intensity. I noticed from the datasheet that a higher contrast change is required to generate an event under low light intensity. However, it seems that the same absolute value
Help! how to deal with the problem?
OS: Windows 11 Professional (23H2) Error: Metavision studio internal error, code 3221225785 signal null
Load intrinsic and extrinsic parameters into the EVK4 using Python
Hello everyone, I have recently been working on a project where I use the EVK4 event-based camera along with a regular RGB camera to capture two types of data simultaneously. To ensure that the view and surface of the objects we shoot remain consistent,
How could I measure the S-curve of the IMX636？
Due to the requirements of my research, I need to measure the response probability curve of the IMX636 sensor to different contrasts accurately. How should I proceed with the precise measurement? And this link https://support.prophesee.ai/portal/en/kb/articles/gen4-0-qe
Where to get EVK4's Sensor Characterization?
Hi, Prophesee! Now I have an EVK4, but Sensor Characterization need to know, such as latency, shot noise rate, threshold and etc. In this link, https://support.prophesee.ai/portal/en/kb/prophesee-1/metavision-sensing/sensors, I found the documents of
Quantifying Signal Strength
I'm trying to quantify the strength of a signal at different accumulation periods, from 100us up. Typically I would use SNR for this, but in the case of an event sensor, that metric is mostly irrelevant. Can someone recommend a strong candidate for quantifying
Uncertainty in lux measurement from .get_illumination()?
Greetings, I was wondering if uncertainty in the lux measurement returned by `.get_illumination()` was known? Thank you.
get_illumination returning -1
I'm trying to compare the sensor lux readout to the events/sec at different bias settings, but the get_illumination readout from the I_monitoring interface only returns -1. Am I missing something about how to get this information? Thanks, Rich
Whether new events are generated during readout latency
Hello. I use the EVK4 event camera for some high activity cases, such as recording the rapid movement of many particles. In this case, due to the high number of particles, the timestamps of the generated events will have a maximum delay of 60 microseconds.
Win 11 Metavision 4.6.2 cmake "Could NOT find TIFF" error
Hello, I am trying to install Metavision on Windows 11 and compile the metavision_viewer. With the Metavision 4.6.2, I got this error after the command: cmake .. -DCMAKE_BUILD_TYPE=Release CMake Error at C:/Program Files/CMake/share/cmake-3.31/Modules/FindPackageHandleStandardArgs.cmake:233
Bias Bandwidth
Hi, As far as I understand the Bias Bandwidth is a parameter that can be changed to avoid high or low lighting fluctuations, but I will also affects the bandwidth of the camera, which is restrictive to the maximum events per sec that can be processed.
Quantification of active pixels/s.
Hi, I would like to know please if there is any code from Metavision to calculate the active pixels/second in a recording? I was thinking in converting my recording to frames by using the Frame Generator and then, having frames with certain accumulation
Unable to locate the path to necessary DLLs for Metavision Python bindings
I am trying to follow the tutorial 'RAW File Loading using Python' (RAW File Loading using Python — Metavision SDK Docs 4.4.0 documentation (prophesee.ai)), but when I launch the program, it shows the following error: Unable to locate the path to necessary
Vibration estimation seems to have a weird bottleneck
Hi, I've been using the vibration estimation code that is provided but im having some issues. The vibration estimation works fine even for detecting high frequencies however I want to run the detection it self at a higher frequency (so how often the algorithm
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?
Feature tracking algorithm
Hi, Is there a feature tracker specifically made or compatible with a prophesee event camera? I want to compare such an algorithm to a conventional KLT tracker. Does metavision or a third-party company provide such an algorithm? Kind regards, Rik van
EVK4 measurement error information
I want to track an object using a Kalman filter, and among the variables, there is an item called variance of the sensor's measurement error, which can be provided by the manufacturer, where can I request it? My model is evk4
Camera not detected in Metavision Starter kit KV260 (IMX636)
Dear Prophesee Support Team, I am working with the Prophesee Metavision Starter Kit for AMD Kria KV260 and followed the instructions provided in the Quick Start Guide. After flashing the SD card and booting the board, I attempted to launch Metavision
Skipping events, based on the performance problems
Hello, Prophesee Team! Let say we have a simple pipeline: auto& cam_stage = p.add_stage(std::make_unique<Metavision::CameraStage>(std::move(cam), event_buffer_duration_ms)); auto& algo_stage = p.add_stage(std::make_unique<AlgoStage>(), cam_stage); auto&
Recording Application for two EVK4's and an RGB Camera
Greetings! In order to do research on event based vision in the context auf autonomous driving I am currently working on developing an application that is used to record two EVK4's- as well as images of an industrial RGB camera. The application is written
Data Collection Issues
I want to use a Python script to simultaneously control the real-time display and acquisition of event data and frame camera data from the same scene. When I use dual threading, the event stream thread displays and saves normally, but the frame camera
USB and MIPI camera different bias defaults and ranges
I am seeing different default bias values and allowable ranges between the MIPI and USB versions of the IMX636. The following figure are the bias values that are found in this article as well as through testing on the Metavision Studio application. For
No module named 'metavision_sdk_base_paths_internal'
Hi, Prophesee team I want to install Metavision SDK on Ubuntu 22.04 and i installed it following the installation document. But when i trie to run python tutorials, i meet a problem :No module named 'metavision_sdk_base_paths_internal' . My python version
EVK4-HD 事件相机的同步怎么接
您好，如果我想要实现事件相机与RGB相机帧同步，我需要怎么接呢？我有一个主控制器可以给RBG相机发帧同步Tigger，事件相机这一段我是只需要把那个Tigger接5脚就行了吗？他的时钟可以悬空吗？
Error while compiling metavision_sdk_get_started
Hi, I have an error while trying to compile the file metavision_sdk_get_started. PS C:\Users\ahamm\Documents\MA4\Project_event_camera\Code\PROPHESEE\core> python metavision_sdk_get_started.py Traceback (most recent call last): File "C:\Users\ahamm\Documents\MA4\Project_event_camera\Code\PROPHESEE\core\metavision_sdk_get_started.py",
Restarting the "Photodiode Voltage" for EVK4
I'm a student at Carnegie Mellon and we're working on a project that needs to measure the events when the illumination of a pixel increases from zero in a static scene (such as instantaneously taking the lens cap off). Currently, we have an EVK4 model.
Event Frame GPU Loading Sample using C++
Hello, I am trying to run the Event Frame GPU Loading Sample using C++ and I am getting an unexpected error. I installed CUDA 11.7, and i am running in a Windows OS. I am following the steps as stated here: Event Frame GPU Loading Sample using C++ — Metavision
Event camera acquisition on Jetson Orin
Hello, I would be interested to make event camera recordings with a jetson orin : 945-13730-0005-000 | Kit de développement NVIDIA Jetson AGX Orin Developer Kit NVIDIA | RS (rs-online.com) Event Camera Evaluation Kit 4 HD IMX636 Prophesee-Sony How can
Extrinsic Calibration Issue- Unable to detect LEDs
Hi I've been trying to use Arduino 2560 to blink 2 LEDs at different frequencies(150&200Hz) - code attached below. However, it seems like LEDs aren't being detected by the Prophesee EVK4 camera - (bias settings are at default (recording attached)) when
Event Camera for Optical Communication
Has anyone used an Event Camera for optical communication? I would like to use and LED to transmit data that can be received with an event camera. Some scenarios include: 1) stationary transmitter 2) moving transmitter 3) multiple transmitters
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