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0 Kudos
halasz

Vision using opencv-python in Labview

Status: New Submitted by Member on 10-31-2025 11:43 PM Comment

Example program to use OpenCV-python in LabVIEW 32-bit & 64-bit (Windows, Mac, and Linux)

OpenCV_Vision_In-out.llb is attached.

 

Input from USB Cameras and IP cameras, display moving images, save as MP4, and read MP4, MOV, and other video files.

OpenCV-Python offers a comprehensive set of tools for various computer vision tasks, including image and video processing, object detection, feature extraction, image transformations, and more.

 

Install Python 3.10 or 3.13 (32-bit for Community V.)
Install Packages:
cv2_enumerate_cameras, ipaddress, numpy, opencv-python, requests, typing
Example on Windows:
Run cmd / In the command window: py -3.10-32 -m pip install numpy
for 64-bit: py -3.10 -m pip install numpy
pip install numpy - may work
On Mac: pip3 install numpy (tested on M2 Mac)

 

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OtAndUt

Displaying the images collected by the capture board in LabVIEW

Status: New Submitted by Member on 05-24-2022 08:24 PM Comment

I want to view the camera image collected through the capture board through LabView.
The camera I'm using is a Fluke IR camera, and it doesn't support connection the same way as a regular camera. That's why I'm trying to do the display through the capture board.
When searching for previous experiences in the community, there were cases where VMS (Video Measurement Suite or Video master) solved this problem, but I couldn't find VMS.
This seems to be an unsupported feature already, is there any other way?

 

 

https://forums.ni.com/t5/NI-VideoMASTER-and-NI/Capture-Frame-with-PXIe-1491-and-videoMaster/m-p/2391296#M140

0 Kudos
cy...

Image Display visible items to include image name

Status: New Submitted by Active Participant on 04-13-2022 08:53 PM Comment

either in Image Information, image overlay text, or any other indication can be useful especially when dealing with a lot of images or/and processes using the same control

0 Kudos
cy...

Snapshot option for Probes

Status: New Submitted by Active Participant on 04-13-2022 08:47 PM Comment

this can help in progressive tracking between image processes during troubleshooting

0 Kudos
cy...

IMAQ Overlay ROIs

Status: New Submitted by Active Participant on 04-13-2022 08:08 PM Comment

hope to see the option for Overlay ROI upgrade with options for:

  • operation (merge): merge / union
  • inverse? (F): positive / negative overlay
  • drawing mode (frame): frame / fill / highlight

this can help to show which regions is going to be processed or already processed. perhaps can complement Overlay Rectangle?

1 Kudos
cy...

IMAQ Overlay Image

Status: New Submitted by Active Participant on 04-13-2022 07:41 PM 1 Comment

hope to see the option for overlay image as an alternative to IMAQ Overlay Bitmap, with terminals for:

  • origin
  • origin type (center): upper left / center
  • offset
  • rotation
  • scale

 

0 Kudos
sevincom

Bug in Custom Overlay VBAI

Status: New Submitted by Member on 02-13-2022 10:24 AM Comment

There is a bug started after VBAI 2020. When user insert measurement on custom overlay text, it does not show up until you go to next line, put a space etc.

Furthermore, when you try to delete a previous measurement that you have inserted in one of your old inspection files, it does not allow you to delete only one measurement. Sometimes you have to delete all the measurements previously inserted.

5 Kudos
flarn2006

Add Vision Development Module to LabVIEW Community Edition

Status: New Submitted by Member on 01-18-2022 01:08 PM 1 Comment

I'm interested in experimenting with the Vision Development Module as a means of learning more about computer vision (not for school or anything) and I think it would be a great idea to make it available free of charge under the Community Edition license. Image acquisition hardware is widely available at very affordable prices, and computer vision has many potential hobbyist applications.

1 Kudos
KiwiWires

Additional Overlay Functions

Status: New Submitted by Member on 11-08-2021 06:19 PM Comment

Hi

I feel there are some IMAQ Vision overlay VIs that would be useful.

 

1) Get Overlay Groups - Returns an array of Group Names and number of items in the group.

 

Useful for example - check if "Legend" overlay exists so don't write it again.

 

I don't see how to tell if overlays are written on top of each other... hence number of items in group (text, line etc) would be useful to look for overlay memory leaks.

 

Provides a way to tell if any overlays on the image as it returns an empty array if no overlays.

 

2) Clear Overlay Except

Currently can clear specified overlays, or all overlays, but no way to clear everything except "Legend" overlay unless you create code to keep track of written overlay groups so you know what to clear.

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JohnDoe102

What Community Software platform are you using?

Status: New Submitted by Member on 07-06-2021 03:38 PM Comment

I like this community platform and I would like to know the name of the platform this community was built on.  This is not a joke or a cheap attempt to advertise for the platform.  If you could reply to me in some way to let me know I would greatly appreciate it.  

0 Kudos
sevincom

Mean Caliper in VBAI

Status: New Submitted by Member on 03-21-2021 06:12 AM 1 Comment

Hi,

 

The caliper function does not create accurate results, in general, repeatability is very bad.

I think this can be improved by adding a "mean caliper" functionality.

Currently, there is only min-max caliper functionality which is not working when looking for average caliper measurement.

 

I use geometry step as a workaround, use Find Edge to locate edges, Distance function and finally Calculator step to calculate the average caliper/distance.

 

Mean Caliper function could be added to Caliper function for more repeatable results with ease of use.

5 Kudos
varshinee97

IMAQ Overlay Line Style

Status: New Submitted by Member on 02-01-2021 01:27 AM Comment

Similar to Draw Line/Draw Multiple Lines function available for Picture, it would be good to have line styles(as mentioned in the attached image) for IMAQ Overlay Line, IMAQ Overlay Multiple Lines 2.

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1 Kudos
carlosss123

Vision Runtime Licensing with a USB Dongle

Status: New Submitted by on 12-17-2020 06:41 PM Comment

This will be useful to deploy projects to end-users more easily. Currently, NI only provides the USB Dongle Solution for LabVIEW, TestStand, and LabWindows™/CVI™. More software into this USB Dongle will provide more flexibility in the licensing options to deploy to end-users.

https://www.ni.com/pdf/manuals/372534d.pdf

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5 Kudos
dreeves73

Make IMAQ image a native data type

Status: New Submitted by Member on 11-27-2020 05:19 AM 3 Comment

This is probably not a simple thing for NI to implement but I always thought it would make sense to make the IMAQ image a native data type. When I first started using LabVIEW, it took me a while to get used to the image data type and understand that it is just a pointer to a named image in memory and the pointer is passed between image operators. I am used to it now but it still seems clunky to me. Why can't an image constant or control implicitly create an image and they can be implicitly destroyed at the end of a program. Branching a wire would create two copies of an image that could be operated on independently. At the moment my imaging code always looks quite messy because I often need to create temporary image buffers for intermediate operations.

 

I think this would make the imaging tools a more wholistic addition to labVIEW and make it feel less like something that was adapted from another language. Sure there would be some impact on performance, but isn't that why we use LabVIEW? Simpler programming at a higher level. 

15 Kudos
varga.sm

Python Scripting in VBAI

Status: New Submitted by Member on 11-06-2020 08:57 AM 2 Comment

Calling a python script from VBAI requires many steps.  Please make it simpler and more intuitive to run a Python script directly from VBAI.  Even if limiting the return types to the data types currently available in VBAI would be fine.  This would allow VBAI to easily utilize OpenCV more directly and more intuitively.

 

Today, the only way to call a Python script is to build the call through LabVIEW, then build the LV VI for distribution to VBAI, then use a call LV step in VBAI.  For simple Python scripts (e.g. manipulating text strings, move, rename or delete files, getting values from dictionaries) this is a lot of unnecessary steps that prevent people from using Vision Builder.  Even seasoned LabVIEW users often have difficulting building a LV step such that it can be accessed by VBAI.

 

Critical for Debugging: During run, the VBAI step should also return the name and path of the environment being used.

 

 

Bonus: A simple Python editor launched from VBAI would be ideal (such as the free version of Visual Studio Code).

 

 

 

3 Kudos
safar

Ni-IMAQdx skip error

Status: New Submitted by Member on 07-02-2020 05:22 AM Comment
When I have a camera with a parameter out of range, I cannot open the connection to this camera with NI-IMAQdx, the only way to connect with the camera is to use another Pleora Software like GevPlayer to communicate with the camera. This SW can open the connection and in the parameters outside the range it puts a sign (!) in front of the parameter.
my idea is to allow to open the connection with the camera the result is not an error but a waring indicated the first parameter that is out of range, with this we can correct the parameter and continue capturing image.
The function (IMAQdx Configure Grab.vi)it should return error in case a parameter is out of range, but function (IMAQdx Open Camera.vi) it should not return an error but a waring as said before.
The same with CameraValidator only returns an error code which means (unable get attribute value) 
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1 Kudos
EvgenKo423

IMAQ Is Vision Info Present / Remove Vision Info VIs should accept multiple types of Vision Info

Status: New Submitted by Member on 06-19-2020 09:28 AM Comment

Currently IMAQ Is Vision Info Present / Remove Vision Info 2 VIs only accept all or single specific type of Vision Info.

It would be useful to check for and remove multiple types of Vision Info in an image at once (e.g. all grayscale template info) and these VIs actually already support this, but for some reason the functionality is not exposed:

image.png

 

Please consider this improvement while fixing a related bug.

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EvgenKo423

IMAQdx Snap VI should open the camera specified by Session In terminal, not cam0

Status: New Submitted by Member on 06-18-2020 08:06 AM 1 Comment

IMAQdx Snap VI is provided for ease of use as a quick way of making occasional shots. However, citing VI reference:

NI-IMAQdx VI Reference Help:

If you call this VI before calling IMAQdx Open Camera.vi, IMAQdx Snap2.vi uses cam0 by default.

This "feature" is not useful for making quick shots and it makes this VI quite useless in general, because it forces you to manually open and close the camera (what this VI would do as well for unopened camera) every time you want to make a quick shot.

With just a little bit more effort (4 VI vs 3) you can make a usual Grab acquisition.

It's OK to have cam0 as default value, but when Session In terminal is wired please make this VI open the camera which the user actually passed.

It's a very easy change, but making it on a user side is not the best idea.

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varshinee97

Overlay Line Smoothness for different angles

Status: New Submitted by Member on 05-07-2020 02:55 AM 3 Comment

Lines at quadrant angles are smooth. But lines with different angles are jagged. It would be better if the rough edges are smoothed.

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elang23

Continued support for IP Cameras

Status: New Submitted by Member on 04-17-2020 05:44 PM 1 Comment

Please reconsider the decision to drop support for IP cameras.  I just had the unfortunate experience of discovering that my application developed in Labview 2018 will no longer support the hardware we have in our department since I've upgraded to 2019 SP1.  We have thousands of dollars invested in IP cameras, and with NI's decision, we can no longer use Labview as the data acquisition development software.