Slice Condition using Python
Hi, I'm trying to make use of the CameraStreamSlicer() function to change the duration of each slice. I've tried looking through all the documentation but I cant seem to figure out how to do this using the Python functions. Based on the information I
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
About the focusing of IMX636
When I was focusing the camera, I met some problems. I followed the steps in the documentation(How to focus an event-based camera), but when I set the aperture to the maximum, no matter how I adjust the focal length, it will look like the image below.
About the IMX636 bias
I noticed in the documentation that for the IMX636 model, only bias_diff_on/off has an effect on its sensitivity. But in my tests, I found that bias_diff also had an impact. I want to know what the details should be.
IMX636 Bias Values for Automotive Driving Scences
Hello, I am planning to use the EVK4 with the IMX636 sensor in recording of an automotive dataset. Are there any existing experiences or recommendations regarding bias adjustment for driving scenes or outdoor environments? If not, what would be the best
x320 writes bad data to file?
With a x320 ES (which doesn't support the EVT3 format), a patched OpenEB (to support v4l2 devices) can only write raw files of collected data -- hdf5 files open then almost instantly close without any errors. If I convert the raw files to hdf5 with `metavision_file_to_hdf5`
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
The exact threshold value of IMX636
I am currently utilizing the imx636 sensor for my research.To proceed with my work, I need to determine the exact threshold value rather than the bias parameter. How could I get this information？
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
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
event camera noise
Hello, I have an EVK3-IMX636 camera, and my observation scenario involves detecting faint spatial targets in dark space. I would like to inquire about how to configure the camera so that it outputs as many events as possible generated by the sensor, without
Advice to combine spatter_tracking and vibration_estimation algorithms
Good afternoon, I wanted to ask how it is better to combine spatter_tracking and vibration_estimation algorithms in one code, so that when i run that code, both features appear at the same window, and work flowlessly parallel. I used this scripts provided
Spectral response curve for EVK4
Hello, I am trying to measure and verify the response probability S curve of the EVK4 camera. But I cannot find the quantum efficiency or detailed spectral response curve for the sensor in the preliminary datasheet. Only found a table with several wavelengths
How to play back data from raw files in real time?
When playing back data from file using OpenEB (5.0.0) using the code below (simplified), the data packets are delivered not in real-time (usually much faster). Is there anything that I'm doing wrong? ``` const auto cfg = Metavision::FileConfigHints().real_time_playback(true);
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
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
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]
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