Sample not running in new version
Hello, With the new release Metavision SDK (4.6) I am unable to open samples (ex. metavision_time_surface.py). But with version 4.53 there is no problem. The following error is shown: ImportError: DLL load failed while importing _errors: The specified
Why do the OFF events come first in a moving object?
Hello, In this example the spinner end is spinning from left to right (clockwise). Why are the first events happening OFF events? Because the contour of ON events also do not look round, so I was wondering how the camera records the movement.
Ask for help
Hello, I would like to ask what is the difference between setting bias_diff_off to -20 and 20?
GenericProducerAlgorithm::is_done() does not change status automatically
Hello, I use Metavision::camera for reading from a file or a camera, and GenericProducerAlgorithm to get events (in the same way as in the metavision_player example) Now I want to close the application when all events was read from a file and processed
ColorPalette in metavision_simple_viewer.py
Hi, All! When I change ColorPalette in metavision_simple_viewer.py I get these error: Code lines 55, 56: As the same time ColorPalette with Light, Dark and CoolWarm is working. How can I manage with this error? Best Regards, Rafael.
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
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
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 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
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
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
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
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
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
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
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,
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
Metavision SDK version.
Hello, To work with my EVK2 Prophesee Evaluation Kit Camera - Gen41 which version of Metavision SDK should I install? can I have the link please? Thank you. Have a great day.
Capturing events between event triggers
I need a way to generate frames using only events between 2 consecutive event triggers. For example, consider the diagram below, where dashes represent CD events, and pipes represent trigger events. I need to be able to ignore events labeled "x" and use
PyTorch version of detection_and_tracking_pipeline.py.
Hi, I have encountered an issue while running detection_and_tracking_pipeline.py. Could you please advise which version of PyTorch I should install? It seems that the version I have installed is incorrect. My graphics card is NVIDIA 4060.
Request for Information on Video Deblurring Technique from Prophesee YouTube Demo
Hi everyone, I recently watched a video on Prophesee's official YouTube channel (link) demonstrating video deblurring. It showcased a method combining a CMOS camera's output with an event sensor's stream. Unfortunately, I couldn't find any related samples
How to calibrate?
Hey, How to use the calibration command? I am using this command with `metavision_mono_calibration_recording` the checkerboard html blinking on my iPad. The right side window (black screen) of the application is empty. I am not even seeing any pattern
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
OPENEB 4.3.0 on ubuntu 20.04, compiling cpp examples
Hello Prophesee Team, I have compiled OPENEB 4.3.0 on arm64 ubuntu 20.04 using the guide https://docs.prophesee.ai/4.3.0/installation/linux_openeb.html and have used Option 1 - working from build folder. the test suite: ctest -C Release run without errors.
MVTec HALCON Camera Not recognized evk4
经过： https://support.prophesee.ai/portal/en/kb/articles/mvtec-halcon-acquisition-interface 目前我下载的halcon版本是22.11 相机无法识别 软件开发工具包4.1 MV SDK4.1 目前测试通过后，软件无法识别EVK4相机。我需要安装其他插件吗？
Could not find a configuration file for package "MetavisionSDK"
When compiling the C++ “sample metavision_sdk_get_started.cpp” with the cmake command, the following error occurs: ------------------------------------------------------------------------------------------------------------- -- Selecting Windows SDK version
OPENEB_4.3.0 Compling Problems Met
I was compling openeb-4.3.0 no my jetson and was in the 'cmake .. -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTING=OFF' step when this error occured: CMake Warning at sdk/modules/core/cpp/samples/metavision_sdk_get_started/CMakeLists.txt:20 (add_executable):
After cutting the RAW CSV text, the time is inconsistent, this is the cause.THK
https://docs.prophesee.ai/stable/samples/modules/driver/file_info.html#chapter-samples-driver-file-info Attached is the same time as the previous one, the same time record, the original RAW text has a lot of points, the more you have written, the more
Background information/reference on analytics tracking schema
Hello, I am looking for information or literature describing the tracking algorithms used in the Analytics toolbox: Generic Tracking using Python — Metavision SDK Docs 4.4.0 documentation (prophesee.ai). I am specifically interested in the approaches
Frequency Histogram
Is there any existing algorithm for determining the frequency component at every x,y location? Similar to the histogram, except instead of time bins, they are divided into frequency bins. If not, can anyone advise on how I might adjust an existing algorithm
Using OpenEB expelliarmus to decode data
Hi Community, I was trying to decode the raw files from the camera using expelliarmus to decode the data and put it to a pandas df. What is the time stamps scale from it. When I use the raw to csv python scripts I get different results and the timescale
Next Page