EVK4 Camera data transfer
The EVK4 camera with an USB3 cable is rated for hundreds of MB/s of data transfer; however, when running the EVK4 camera in a rapidly changing environment (where almost all pixels across the camera's resolution are changing) for around 10 seconds, an
Expected response for large intensity changes
Hello, I have a question regarding the expected response from the event camera pixels for very large intensity changes. The working principle of event cameras is that the if the long contrast between the intensity levels exceeds a certain threshold (determined
Some questions about positive events and negative events
I have an EVK4 device, when I use python's EventsIterator to read the events generated by the device, the delta_t is 10ms, and other parameters are the default values, but I found that when the brightness of the picture captured by the event camera does
Details about internal circuits
To facilitate my research, I would like to understand the general logic of the integrated circuit inside a sensor or schematic diagram. Where could I obtain these materials？And my sensor is IMX636.
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
Power consumption EVK3
Hello everyone! According to the product brief document of EVK3 power consumption is 4.5W, there is no power consumption value in the manual of EVK3. For EVK4 - power consumption 500mW (Typ), 1.5W (Max) (according to its manual). So we measured maximum
Serial Number Write Failed
We have four EVK3 gen 4.1 cameras that have serial numbers: "ffffffff" for all four cameras and would like them to be unique. Below is what all four cameras display when using the metavision_platform_info command: ## Prophesee Gen4.1 HD ## # System information
MVTec HALCON Cannot Recognize Evk4 Camera
I follow the guidence https://support.prophesee.ai/portal/en/kb/articles/mvtec-halcon-acquisition-interface#Installation, but it still cannot recognize the camera. In particular, I am confused about the specific implementation of the interface installation
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
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
Raw data capture in KV260-IMX636 sensor not decoding with metavision-viewer
Hi, We have imx636 mipi event camera sensor running in KV260 board and it is running with metavision_viewer app. But when we replay the raw data captured with metavision_viewer app, first it is not able to decode. Throws missing format error. Next added
Deciding between EVK4 and Kria starter kit.
Hello Prophesee Support team, We are trying to purchase the IMX636 sensor, but are deciding between EvK4 and AMD kria kit. I am concerned whether there would be more complications with the kia kit. - Are there any limitations for using the AMD kria kit
EVK1 VGA is not seen by metavision studio 3.1
I have EVK1 VGA camera, one of the old ones, I also installed metaviison_sdk 3.1 beucase it is latest version that supports that cameras, but when I click open camera i get only "No Prophesee cameras available, please check that a camera is connected
ModuleNotFoundError: No module named 'metavision_sdk_stream'
I have an EVK4 and I am trying to interact with the camera using Python. I have installed the SDK according to the instructions on this page (https://docs.prophesee.ai/stable/installation/windows.html) but when I create/activate the venv, Python can import
Extrinsic Calibration Reference Point
Hello everyone, I am currently performing an extrinsic calibration with the EVK4 HD and would like to validate the results of my translation. I have already been able to measure the X (horizontal) and Y (vertical) directions in a CAD model or directly
Re-extract bias file
Hello, I left a message because I have a problem. I know that when I shoot, raw files and bias files come out. But I accidentally deleted the bias file, so only the raw file remains. At this time, is there a way to find out the bias setting value again
EVK4 HD Evaluation KIt
Hello Prophesee Support, I have following questions regarding EVK4-HD. 1. Does you provide Lens with EVK4-HD kit purchase? 2. Can you provide 3D CAD model of the lens ? Regards, Nikunj
Installation of free Metavision sdk 4.6.2
metavision-sdk-analytics-bin : Depends: libopencv-core4.5d (>= 4.5.4+dfsg) but it is not installable Depends: libopencv-highgui4.5d (>= 4.5.4+dfsg) but it is not installable Depends: libopencv-imgproc4.5d (>= 4.5.4+dfsg) but it is not installable Depends:
ROS node with standard CPU architecture
Hello, I am trying to use the EVK4 to make a ROS node for a larger system. I am looking to build the ROS node on a PC with a traditional x86 Intel-i7 processor. I saw on the ROS node website (GitHub - prophesee-ai/prophesee_ros_wrapper: ROS driver for
Possible acquisition problems with stripes and misalignment
Hello everyone, I've been experiencing some strange behavior with the visualization of events. The sensor model is EVK4. I have two devices, and both exhibit the same behavior. Specifically, I notice several shifted bands across the image, almost as if
Bad x320 firmware? Driver development for Raspberry Pis
After a few weeks of playing around, our Genx320 can talk over i2c to a Raspberry Pi 5, but apparently not over MIPI/CSI2. This involved creating a device tree overlay, modifying the Linux drivers open sourced by Prophesee, patching v4l2 utils, compiling
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
EVT 2.1 format and examples from GenX320
Hi there, I'm working on an application using the Kria KV260 starter kit and GenX320 sensor. We have the simulation IP working correctly and producing events which correspond which is great but I have two questions: Based on my understanding of https://docs.prophesee.ai/stable/data/encoding_formats/evt21.html,
Meta studio keeps a blank tab in front of the camera livestream
Whenever I try to use metavision studio with the EVK4 camera, the tab shown in the figure stays in front of the main interface, even when I try to minimize it most of the time. Sometimes minimizing works but even then I am unable to use any of the buttons
KeyError: np.uint32(50000)
Hello, when I was using the Python inference pipeline for detection and tracking, an error "KeyError: np.uint32(50000)" occurred. The specific situation is shown in the screenshot below. This is the same whether I'm using the driving_sample dataset or
How to Improve Video Clarity and Edge Definition for Hand Movement with EVK4 in Indoor Lighting?
Hello, I'm currently working with the EVK4 and I'm trying to improve the clarity of the videos it captures, specifically making the edges of moving objects, like fingers, more defined. I've been experimenting with various parameters, but haven't been
Use the trigger interface to collect, and open the collected RAW files with metasion software. There is a freeze on the screen. How can I eliminate it? Thank you!
External trigger source 1MZ, logic analyzer test results RAW file trigger information 3、When opening RAW files through METAVISON software, the screen keeps getting stuck, and the effect is as shown in the attachment. 4.problem 4.1. Want to know how to
LIBUSB_TRANSFER_ERROR after running for sometime
Camera: EVK4 Environment: Ubuntu2204, OpenEB 4.6.2, libusb 1.0.0 Problem: We are running USB camera for long time but sometimes get the following messages. [HAL][ERROR] ErrTransfert [HAL][ERROR] LIBUSB_TRANSFER_ERROR [HAL][ERROR] ErrTransfert [HAL][ERROR]
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
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,
Pre-trained Model
I want to implement event stream based object detection and tracking, I noticed that the official documentation mentions pre-trained models, what algorithms it uses and what datasets it is trained on, where to download pre-trained models
Contrast threshold IMX 636
Hello, I've been watching this video (Metavision Training Videos | Introduction to Event-Based Vision Sensor) to understand the definition of contrast threshold. They mentioned that IMX 636 sensor uses a log definition of contrast but I haven't found
Graphical User Interface for synchronized recording of Events and frames.
Hello everyone, I am currently working on a project in which a hardware trigger between the EVK 4 and an industrial camera is used to record events and images in a synchronized manner. The focus here is on ease of use. The aim is to create a GUI that
adding a hardware IR cutoff filter in EVK4
Hello Prophesee and community, we would like to record in an environment which is contaminated by "IR flickering light". So we plan to add an IR cutoff filter into EVK4 (HD). Similar to the description for EVK1 here: https://support.prophesee.ai/portal/en/kb/articles/inserting-filter
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)
Timestamp of triggers
Dear all, I followed your documentation page to successfully record a RAW file with external trigger events using a wave generator. My question is about the exact function call from which the time is calculated in your example. When the time counter is
get_pixel_dead_time() erroring out on Gen4.1 EVK3-HD
I get the following error when trying to get pixel dead time for my EVK3-HD Gen4.1: Metavision HAL exception Error 104000. Has anyone experienced this or alternatively knows the dead time with default parameters?
RotateEventsAlgorithm
Hello, Where can I get the description/example of this please?
Camera sensor check
Hi Prophesee team, I want to find a sensor data sheet for our camera RDK2 IMX636. Could you please help me give me some information about it? Best regards, Yugang
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