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
Help! how to deal with the problem?
OS: Windows 11 Professional (23H2) Error: Metavision studio internal error, code 3221225785 signal null
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
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
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
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 ?
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!
Multi camera sync connection
I've connected two cameras by aligning the sync out and sync in as shown in the following photo. However, upon consulting the schematic for connecting the devices, I noticed that two sync ins are originating from a single sync out. In such a case, would
FPGA not properly configured
When trying to open my EVK1 with the Metavision Studio 3.1 i get the following error message in the console: FPGA not properly configrured. I have never changed any settings or send any FPGA commands. Does anybody have an idea what happened or how i can
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.
Recommendation for Frame based Camera for Integration with DVS
Hi, I plan to sync frame based camera with DVS, according to guideline the frame based camera should output sync out signal to DVS Trig in. my question is do you have any recommendation of frame based camera that has dedicated port to sync out signal?
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
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
Reset timestamps for multi-cam sync
Hello - I am utilizing 4 SilkyEvCam modules in a stereo setup. I have connected configured one of the cameras as the master and the other three as the slaves in software. I then connect the sync out of the master to the sync in of each slave. Distances
Active pixels behind the moving object - Pixel latency
Hi, I'm doing an experiment about a rotating black DOT in a white background with backlight to maximize contrast. In all the cases I have this ON events after the movement of the DOT which in this case is going clockwise, this actually looks like a tail
How to read camera data using fpga
We hope to use fpga to read the camera data instead of SDK. Is there any relevant information or documentation？
Data transmission & Processor
Hello, According to the data announced on your site, the equivalent temporal precision of the event-technology is over 10 000 fps. Is this value fixed? Or can it decrease again in the most unfavorable cases? For example, we have a VGA EVK1 with a resolution
No plugin found error on Jetson orin nano
Hi, I sussessfully compiled OPENEB-4.3.0 on my Jetson Orin Nano ( arm64 coretex, Ubuntu 20.4 ), and I lunched 'metavision_viewer' from the 'build' fowder. And I plugged EVK3 to my Jetson, but there comes the warning: 'no plugin found' and 'Metavision
Metavision interface for Mvtec Halcon
There is a problem to install the MVTec HALCON acquisition interface for prophesee camera. the last version of your SDK don't mutch with your dll file for the interface. These attachemements works only for 4.1 version and not for 4.3 is it possible to
Overheating Gen4.1 sensor
Hi, I've been doing experiments with the camera where the event rate is always around 100 Mev/s, with around 10 minutes of use, the camera starts to overheating and the Metavision Studio app stops suddenly. Can I know your opinion please about this? Since
Help understanding the difference in response between positive and negative events.
Hello everyone, I've been working with an EVK3 as part of my PHD thesis. In order to quantify the effect that the on and off biases have on the response of the camera, I have set up a simple experiment that uses the camera to measure responses to a pulsing
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.
What is the default bias value of IMX636? And how to calculate the event based the bias?
We read the default bias by the provided software and obtain the default pos_thres=102%，neg_thres=73%. It's very curious. If we set the intensity of two images as I1 and I2. We can get a positive event only if I2 - I1 > 102% * I1. It seems not very reasonable.
Band Pass filter bias units
I have an EVK3 and I'm trying to understand the units of the fall off and high pass filter settings. I'm hoping I can use this to target a specific frequency of motion if I know the expected frequency ahead of time. For instance, suppose I have a light
Relation of abolute bias values of Gen4.1 and IMX636
Hello, I read in the forum: "Setting the logging level to TRACE as described here : https://docs.prophesee.ai/3.0.1/faq.html#how-can-i-change-the-logging-level-at-runtime should help you to see absolute bias values on your Gen4.2 sensor (IMX636) and the
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
How to evaluate the quality of synchronization between event camera and external sensor?
Hello, I'm working on synchronization between IMU and event camera(EVK4). I use hardware trigger to synchronize as documentation says. However, it is hard to evaluate the synchronization quality. A naive way is the compare the data between IMU acceleration
120 degree FOV lens for EVK4 HD
Hello everyone! Does anyone have a recommendation for a good quality, but not overly expensive lens for the EVK4 HD? 120 degree FOV. BR
cannot retrieve biases on SilkyEVCamHD
On a SilkyEVCamHD the reading of bias parameters through the SDK fails. The identical code works for the SilkyEVCamHD: const Metavision::Biases biases = cam_.biases(); Metavision::I_LL_Biases * hw_biases = biases.get_facility(); const auto pmap = hw_biases->get_all_biases();
OnDemandFrameGeneration Segmentation Fault and malloc error
I have run into a problem with the OnDemandFrameGeneration algorithm when encountering high event rates. Currently we are making our own multi-event camera calibration program (to calibrate intrinsics and extrinsics in one pass) and I found the OnDemandFrameGeneration
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？
Where to get Quantum Efficiency for the EKV4-HD chip？
EKV4-HD是否使用GEN4.0芯片？是以下链接吗？还是以下文件？https://support.prophesee.ai/portal/en/kb/articles/gen4-0-qe
Is it possible to invert the polarity of EVK4 sync_out?
We are designing a synchonization circuit for multiple EVK4 cameras. In our test, the fall edge of the sync_out signal (50ns) is much shorter than the rise edge (~200ns). Is it possible to invert the polarity of sync_out signal by setting the api/registers
Consume trigger events using the BaseStage/Cam API
Hi, Just wondering if it is possible to access trigger events using the BaseStage::set_consuming_callback() API. In the docs there is only mention of the HAL API for accessing trigger events. Thanks!
EVK4 Gen4.2 bias settings
Hello, I wonder how to interpret the values "bias_diff_on" and "bias_diff_of" and why it is not possible for our setup with EVK Gen4.2 to set both values to 190 and 190. Metavision3.0 allows us to set only 190 and 140. What is background of that behavior?
EVK1 GEN3.1 VGA - Pins "push pull" or "open-collector"
Hello, We want to synchronize a 2D camera with the trigger of an EVK1 GEN3.1 VGA camera. To do this we use the PIN 0 and 1 of the camera as detailed in the following link: https://support.prophesee.ai/portal/en/kb/articles/trigger-in-out We would like
Min contrast sensitivity of VGA CIS sensor (EVK3-VGA)
Hi! We recently acquired a EVK3-VGA and I have a question about its minimal contrast sensitivity. I am wondering what the minimal contrast sensitivity this sensor could achieve? I found there are different numbers (12% and 25%) in three references (please
What kind of extension USB cable can I use for my evk?
The cable delivered with the camera is too short for my usage but using a longer one is not reliable and my EVK is not always working properly.