Help! how to deal with the problem?
OS: Windows 11 Professional (23H2) Error: Metavision studio internal error, code 3221225785 signal null
Measuring Pixel array current GENX320
Hello, Is there a pin on the GENX320 EVK3 kit where it possible to measure the total current generated by the photodiodes of the pixel matrix ? I'm trying to measure dark current from the pixel's photodiode. For that, the closest i got to the value of
Delayed response of events in Low Light Conditions.
Hii, my experiment consist in a black rotating dot with a background light to generate contrast. When I keep all conditions the same only changing the light intensity of the background light I notice that there is like a time delay or a latency (I dont
Multiple DVS synchronization (more than 1 slave)
Hello everyone, Our team plans to synchronize more than one slave DVS (with one master and three slaves). We've followed the recommendations for multiple DVS synchronization, but during testing, we found that only one slave is precisely synced with the
Video writing for spatter tracking
Hello, I am using the metavision_spatter_tracking.py code with these parameters: python metavision_spatter_tracking.py -i recording.raw --cell-width 7 --cell-height 7 --activation-ths 10 --accumulation-time-us 50 -f 3 -o video I want to save the video
How to record in stereo?
Hello. I'm connecting 2 event cameras in stereo. I already did the synchronization by using the metavision_sync.py algorithm but I couldn't find out how to start to record with both cameras at the same time. I used the metavision_simple_recorder.py but
When the saturation takes place, do the remaining columns become more sensitive?
Hii, I have been doing an experiment to understand a bit more the behavior of the camera when the saturation takes place and my results show that the higher the saturation, the higher the average event rate per row. My experiment consists of several points
Writing in a GENX320 register
Hi ! I'm trying to measure the quantum efficiency for GENX320. I'm trying to follow the same procedure as in the related article https://support.prophesee.ai/portal/en/kb/articles/qe-estimation As the article mentions, quantum efficiency can be determined
OpenEB: metavision_player (.cpp example) doesn't write video in .avi
Hi! I compiled OpenEB on Jetson platform (Ubuntu 20.04) according the manual: https://docs.prophesee.ai/stable/installation/linux_openeb.html#chapter-installation-linux-openeb I need to save recorded video from event camera EVK3 in .avi format: ~/openeb/sdk/modules/core/cpp/samples/metavision_player/
How to get a symmetry between bias_diff_off and bias_diff_on about IMX636
Hi, there is a note that it is possible to get a symmetry between "bias_diff_off" and "bias_diff_on" by setting those two bias parameters to the same value in the biases of metavision SDK docs. I want to know the same value is point to the current value
How to improve the writing speed of CSV files?
# Define a thread function to write to the CSV def write_to_csv(event_queue, output_file): with open(output_file, 'w', newline='') as csv_file: csv_writer = csv.writer(csv_file) while True: try: # Get events
How do I output recorded events directly to a.CSV file instead of a.raw file
I'm using python. I saw the simple_recorder routine and the raw_to_csv routine in the python example. But I had a problem when I tried to combine the functionality of these two routines (to display camera contents through a window and output a csv file
Dynamic ROI
Hi guys I am trying to solve the following problem and am stuck: I have detected some regions of interest. In addition to the position, I have recorded the corrosponding timestamp. Now I want to dynamically extract the regions from the existing RAW file
access to the introspect player
Hi there, I found out about the Introspect Player shown in the bias tunning video. https://support.prophesee.ai/portal/en/kb/articles/bias-tuning-region-of-interest-roi-31-8-2023 It would be very useful for our research if we could access it. I was wondering
Problem generating Histo or Diff raw files
Hello, I am running "event frame gpu loading sample" by following the exact instructions given: First, compile the sample as described in this tutorial. Then, you can use the metavision_event_frame_generation sample to generate event frame RAW files in
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
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
Some routines do not run and cannot find corresponding module
When I tried to run the metavision_sdk_get_started file, I found that some of the files were not found in the set file (see the image for details). My python version is 3.8. I'm using the windows version. Can you tell me what I should do to successfully
Reduce resolution of a recording
Hello, I am running some recorded .raw data with 1280*720 resolution and I would like to make some comparisons on how this would work on a 640*480 resolution. I have been searching on how to do this and I have seen the posibility of applying a ROI filter
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
Issue with Converting Recordings to HDF in Metavision Studio
Hello I have encountered an issue while using Metavision Studio to convert a series of video recordings into HDF files. Specifically, when attempting the conversion process, some of the videos fail and prompt an error message related to the chronological
All paths, where OPENEB binary is installed on linux (arm64, Jetpack 5, ubuntu 20.04)
Hello Prophesee Team, I have compiled my CPP application on the development system and now I am trying to understand which binaries are exactly created on my development system by the OPENEB 4.3.0 installation process. This will allow me to copy them
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.
Raw file to video
Hello, I noticed that there are some code samples available for converting RAW files to video in C++. However, I'm having difficulty finding an equivalent solution for Python. Could you please advise if there is any Python code available to do this ?
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",
Readout saturation definition
Hi, is it correct to say that read saturation is a combined effect between event rate and number of active rows in the image? I have done an experiment with different lighting conditions and speeds and I find that improving the lighting conditions, the
vcpkg installation error
Hello, This might not be related to the application directly, but I am getting stuck at one of the steps in the installation process! I am having trouble installing the vcpkg as it is having trouble downloading 7-zip and manually downloading it and adding
When the camera is connected to the computer, the camera cannot be recognized (Windows)
Installation package version: 4.5 After the camera is connected to the computer, the device WestBridge can be found in the universal serial, but the camera cannot recognize it. What plugins do I need to install or do so that the camera can recognize it
PolarityFilterAlgorithm is not in Pipeline
Hi! How to use Metavision::PolarityFilterAlgorithm() algorithm in metavision_viewer.cpp file without pipeline? Metavision::PolarityFilterAlgorithm() used in 2 examples: metavision_filtering.cpp and metavision_composed_viewer.cpp with pipeline. The part
Sparse Optical Flow in C++ Speed information
For extracting the speed information using the metavision_sparse_optical_flow I changed some code lines as in the website is said with the function void writeCSV. This function gets the flow_output and writes it down in a csv format. I try to run the
Issues of EVT2 RAW File encoder
Hi, when I used metavision_evt2_raw_file_encoder to encode a CSV file into an EVT2 format RAW file, I found that the timestamps of the events in the RAW file were different from that in the original CSV file. There is a difference of tens of microseconds
Accumulate events between triggers
Hi, Just wondering if it is possible to accumulate events between triggers to frames. For example, when an on trigger fires, then accumulate events until next trigger. Thanks!
OPENEB 4.3.0 Pipeline Jetson Xavier Performance
Hello Prophesee Team, I successfully compiled OPENEB 4.3.0 on arm64 Ubuntu 20.04 using the guide provided at https://docs.prophesee.ai/4.3.0/installation/linux_openeb.html Additionally, I managed to compile and run my C++ application, that utilizes the
Error gotten while finding modules in Python samples
I have an issue while trying to convert with the provided "metavision_file_to_csv" one of the samples. This is what i input in the command windor: py metavision_raw_to_csv.py -i spinner.raw. While finding the different functions and modules this calls,
Error when installing extra libraries
I am re installing the whole metavision SDK and i am checking all the extra libraries are installed. When i run this command: python -m pip install "opencv-python==4.5.5.64" "sk-video==1.1.10" "fire==0.4.0" "numpy==1.23.4" "h5py==3.7.0" pandas scipy the
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)
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
Camera connection error: [SERVER] - stderr - [HAL][ERROR] Unable to open device
I connected an IMX636 to my computer, ran metavision studio (SDK 3.1.2) and clicked "open a camera". However, cmd will display the ERROR message "[SERVER] -stderr - [HAL][ERROR] Unable to open device". This error will be reported for a total of 4 times,
Dataset Structure for YOLOv8 Training Issue:
I'm encountering problems while training a YOLOv8 model using a custom dataset structure. I've followed the steps outlined in Prophesee YOLOv8 tutorial and used the Prophesee ML labeling tool. I am getting the following error: ValueError: num_samples
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
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