IMAQ-continuous image acquisition for VB

C:\Program Files\National Instruments\NI-IMAQ\Sample\MSVB.NET\Getting Started
Configure()
CWIMAQ1.Start()
CWIMAQViewer1.Attach(CWIMAQ1.Images.Item(1)) <--------I do not understand
Can teach me
And, how to acquire the single image under the continuous state.

Burki,
Are you trying to save the continuous images as a movie? This is not supported in VBAI, however if you wish to snap continuous frames individually you can try editing your inspection state diagram to repeat your current inspection and transition to the stop step only after your current inspection has been performed a set number of times.
Regards,
Isaac S.
Applications Engineer
National Instruments

Similar Messages

VBAI Balser Ace Continuous Image Acquisition

We are running VBAI on a fast PC through an Intel Pro/1000 port and jumbo frame GigE switch to a large number of Basler Ace GigE cameras.
Two of the cameras are inspecting a rotating part. They both have hardware encoder triggers wired to their input lines.
In order to capture a sequence of 9 images, we are using the continuous every image acquisiont mode with buffers set to the max of 10.
We assume that in this continuous mode these cameras will broadcast frames, nonstop, to the PC, consuming network bandwidth even for the gaps between successive inspections.
In order to conserve network bandwidth, should we turn continuous mode off after we have captured 9 frames by putting the camera in shaphot mode with a read/write camera parameters command? Or is there a way that we can use the Number of Frames to have it automatically stop after 9 images?
The Basler users manual describes a number of low level Pylon SDK commands to control starting and stopping acquisition, but those are obviously not available from VBAI.
Thanks,
Nelson

I tried using the camera's attributes for "Acquisition Mode" set to Single Frame and the "Acquisition Frame Count" set to 9, but it looks like the frame count only applies if the camera supports a "MultiFrame Acquisition Mode" and my Ace did not, so I don't think there's a good way to do it using publicly available camera attributes.You could do as you describe and change the cameras attributes so it's no longer continuous once you get the images you need. Another option would be to gate your encoder signal so the camera is only triggered when you want it to be (not sure how easy/feasible this is, but this would be the cleanest in SW side since you know every image is a valid one and you don't need to worry about discarding images). Another option is to throttle the camera bandwidth so it can't send data as quickly and doesn't take as much of the GigE bandwidth, and you can even use the "Frame Transmission Delay" attribute under Transport Layer to offset the two cameras so they aren't sending their images at the same time.
Hope this helps,
Brad

Keep all overlay information during image acquisition when using the base IMAQ package

I have made an X control from the IMAQ image display control that has the ability to overlay points and lines on an image but when I put my X control into my image acquisition loop the overlay information disappears with every new image I acquire.
How can I keep the overlay in place and just update the control with the new image and not overwrite the overlay data? I have tried the merge overlay function but this does not seem to work.
Thanks.
Solved!
Go to Solution.

Overlays normally are erased when you acquire a new image. You could create the overlays on a separate image, then copy the overlays to each new image before you display it. The other option is to recreate the overlays for each new image.
Bruce
Bruce Ammons
Ammons Engineering

Uses for trigger on image acquisition board.

I am new to the concept of external triggering of events. I am trying to figure out how to use the trigger on an image acquisition board (specifically - I have the pci-1411). I am wondering if I can use the trigger for things that have nothing to do with image aquisition. I don't necessarily want to acquire an image when the board receives a trigger signal. I would like to use the board to detect that trigger signal, and, when it does, execute a particular set of code. Can this be done?
Also, I am wondering if the IMAQ image acquisition boards that are capable of generating a signal through this trigger (I understand that the pci-1411 cannot generate a signal?) could be used to control some external device like a s
mall motor for example.
Thank you for your help.

Kindly refer,
http://zone.ni.com/devzone/conceptd.nsf/webmain/BF9C43586430C32B86256BFB00528558?opendocument
http://search.ni.com/query.html?col=alldocs&qp=%2Bcontentformat%3Asoftwarelib&layout=SoftLib&qt=%2Bimaq+trigger+pulse
The pulse that the imaq board generates is not meant to drive motors. For that we have motion cards, refer, ni.com/motion
http://zone.ni.com/devzone/conceptd.nsf/webmain/66E6F4EE7E0848D686256A550060C436?opendocument
IMAQ Generate Pulse - This function allows you to generate a pulse from the TIO chips on the board. This functionality is only supported with the 1409 and the digital boards (1422, 1424, 1428). You can only drive at most two pulses at once. Driving pulses doesn't require events, unless you are triggering the pulse off o
f the Frame Start or Frame Done.
IMAQ Trigger Read - This function allows you to read the status of External Trigger lines or RTSI lines.

When images appear for a search in safari, you must continually scroll by finger to keep the images loading. Is this a bug?

When images appear for a search in safari, you must continually scroll by finger to keep the images loading. Is this a bug?

Tried that but no change. Details - open up safari and go to yahoo - for the main search at the top, I put in Bears. It shows pages of thumbnail pics. tapping once on a thumbnail gets you that image and then tap again to get added info. At that point, it fills the screen. But in order to see more info I have to drag a finger upward to reveal more of the details. I then have to continually do that in order to reveal more details for the searched item. It then pops up to the top each time and repeating that process many times in order to see more of the image data. Don't know how to fix this.
Thanks

Is vision development module in labview 8.6. sufficient for real-time image acquisition and analysis using a webcam

Hi,
I'm new to labview and trying to develop an eye-tracker using labview 8.6. It has the vision development module and i was wondering if this was sufficient for real-time image acquisition and processing or would i be needing any other software tools.
Solved!
Go to Solution.

Hello, certainly it is possible and sufficient for real-time tracking!
About eye tracking - if you need an example, you can find the code here:
https://decibel.ni.com/content/blogs/kl3m3n/2013/10/08/real-time-face-and-eye-detection-in-labview-u...
The code uses OpenCV functionalities along with the LabView UI (and some other functions like overlay).
Hope this helps a bit.
Best regards,
K
https://decibel.ni.com/content/blogs/kl3m3n
"Kudos: Users may give one another Kudos on the forums for posts that they found particularly helpful or insightful."

What is the most suitable image format for processing with imaq?

Hello.
What is the most
suitable image format for processing with imaq?
I want to capture an image of a usb webcam, store and
then process it with imaq. I need to know what format to save the
captured image can then load and process it with imaq vision.
Thanks

The only criteria is: don't use JPEG for anything scientific! The compression involved with saving JPEGs means you always lose information. I tend to prefer PNG - it's compressed, but non-lossy, and also widely supported. TIFF is fine as well, but I don't think has any advantages over PNG for this application. JPEG2000 can give good non-lossy compression I think is slower to read/write than PNG.

I am using PCI-6033E IO card and i would like to send 5 volts (high logic ) to the trigger box. the trigger box will trigger the frame grabber card, that i am using for image acquisition.

i am using PCI-6033E IO card and i would like to send 5 volts (high logic ) to the trigger box. the trigger box will trigger the frame grabber card, that i am using for image acquisition.

Hello;
The first thing you need to figure out is the shape of the trigger pulse needed.
In case you just need a logic high TTL pulse, you can use one of the digital lines of your DAQ device.
In case you need a pulse train (multiple trigger pulses), you will need to configure one of the general purpose counters to accomplish that task.
You can find examples in both Labview and NI-DAQ showing how to program your DAQ board to accomplish both approaches.
Hope this helps.
Filipe A.
Applications Engineer
National Instruments

Do I need LabVIEW RT for a simple 10objects/sec image acquisition/processing?

I have a pretty simple application. A photoelectric sensor detects an object and triggers the image acquisition. The image of this object is then processed (a few morphological functions and particle analysis) and results are displayed in a table before a new image is acquired. The application also includes indicators for high/low limit, statistical calculations and a report generation. 7 to 10 particles per second are analyzed. Being still in the design phase, I use LabVIEW 7 Express. Do you think the LabVIEW Real-Time Module is necessary for my application?
Thank you very much for your help.
Bernd

Hello Bernd,
LabVIEW Real-Time is used to acquire robust and deterministic operation. It's basically a stripped down operating system that runs your application, and that's it. There's no additional software running in your background that can clog up the processing queue and lose the exact execution that your application requires.
Yes, you could use Real-Time for your application, but I don't think it would be necessary. If anything, you may be limited by the hardware that you use and whether or not it will be able to acquire as many images as you would like in that short period of time.
National Instruments does have a real-time Compact Vision System which you may not to inquiry further about. I would strongly suggest posting a very simi
lar question to the Vision discussion forum to see what developers in that area think about your application. The numbers that you mention alone may light up a few light bulbs as to which LabVIEW target is generally used to reach the goal you desire.
Hope this helps.
Jared

Express vi for image acquisition is missing

I am using labVIEW 2014. I am doing a project which is based on image acquisition and recognition. I installed both VDM and VAS tool kits. But i am still unable to locate the image acquisition express vi. Please help me with the same. I have also attached a screen shot of the same

yes, i have installed the imaqdx drivers. still i am having the same problem

Error -1074396120 IMAQ Get Image Info Error "Not an image"

Hello everyone,
I'm currently working on Machine Vision project. It has to measure distance of small metal elements, which moves on a conveyor. I've built and tested measurement algorithm in NI Vision Builder and it worked really cool. Today I tried to migrate inspection to LabVIEW in order to add features connected with sensors which I use in my project. When migration completed I run a VI, and suddenly got error:
Error -1074396120 occured at IMAQ Get Image Info
Not an image.
I use in my project Logitech Pro 9000, and I can see it in MAX. I acquire image in 640x480 resolution as RGB2. I read somewhere that it could be caused by RGB colors of image. In my algorithm after acquiring image is thresholded in order to get binary image.
Please tell me which block diagrams should I attach to this post to make it more understandable for you (if it is needed). Is it possible to fix this error ? Did anyone sorted it out already ? Thanks for any help.
Best regards,
Michael

First of all I would like to apologize for long delay in replying and thank you for your replies.
@toto26:
Yes, I used before threshold function a function you mentioned. The problem is that my algorithm works correctly in Vision Builder, but after migrating to LabVIEW, when I run a VI it doesn't work. It's strange for me.
The problem also occurs when I made my algorithm as simple as possible - now it includes two steps: acquisition and find edge function. After migration it still cannot acquire an image. Below I present an error and a place where it occurs (process ID already in use):
I think that it would be easier and faster when I understand IMAQ functions. I want to build my algorithm from the beginning in LabVIEW, because I would be aware of every part of my program. Please tell me if it is possible with my camera. Could you suggest me where can I find information about building vision application in LabVIEW for beginners. What keywords should I look for.
Thanks for any advice,
Michael

I really want to get IMAQ Case Image and IMAQ Arry to Image.vi files

Hello!
Although I already installed LabVIEW8.2 and NI-IMAQ, I do not have IMAQ Case Image and IMAQ Arry to Image.vi files.
To use infrared camera, I need them.
I really want to get IMAQ Case Image and IMAQ Arry to Image.vi files.
How can I get these files?
Please, let me know the methods.
Sincerely!
Solved!
Go to Solution.

Please stick to a single thread for same type of questions. continue in your original post here.

Image acquisition using video capture card

I am developing an application for Single fiber fusion splicer...my application basically has to capture the picture from the splicer using a Video capture card...Is it possible to use IMAQ session to get the picture from the card,store it a file and display the same using labview??or is there any other suitable way instead of IMAQ???

Cyril,
A typical image acquisition system consists of the following
components:
Camera » Framegrabber board » Image Acquisition Software »
Image Processing Software
The software in this application is of course LabVIEW. The ease of integration of it with your
camera and framegrabber board is dependent on a number of variables and I
discuss that further in the rest of this post.
Camera
It looks like you already have a camera picked out, but I could not find
any information on the VHR-1000 on the internet. Who is the manufacturer? Can you provide a link to information
available about it online? NI does
not actually make cameras; we simply connect with third party
cameras. We have a list of the
various cameras that are tested and supported by our hardware available at
http://www.ni.com/cameras
Here are two more documents that will discuss camera options in more
detail:
Choosing A Camera
http://zone.ni.com/devzone/cda/tut/p/id/3087
Image Acquisition
http://zone.ni.com/devzone/cda/tut/p/id/2808
Framegrabber
board
The framegrabber board is what will be responsible for taking the signals
from your camera, either digital or analog, manipulating them
appropriately, and storing them in computer memory.
The framegrabber board you choose will largely depend on the camera you
choose and the interface it uses. (Interfaces are discussed in the Image
Acquistion document mentioned earlier)
It looks like you already have a Domino Maxi framegrabber board, which
LabVIEW may or may not be able to interface with. Could you please provide more
information and possibly a link to some info on this framegrabber board?
Choose NI Vision Hardware
http://www.ni.com/vision/hardware.htm
Image
Acquisition Software
The Image Acquisition software is the software responsible for bringing
images into the computer in conjunction with the framegrabber board or
IEEE-1394 bus. Depending on your
interface, you will need either NI-IMAQ (framegrabber) or NI-IMAQdx
(IEEE-1394).
Image
Processing Software
For image processing in LabVIEW, you will need the Vision Development
Module. It’s product page can be
found here:
Vision Development Module
http://www.ni.com/vision/vdm.htm
This software will enable you to do any type of image processing that your
application may require.
Those are the basic components of an image acquisition
system. Hopefully you will be able to
follow those links and gain a better understanding of what exactly you need to
be able to setup the kind of system you are looking for. This presentation provides a great deal of
general information and may be able to answer some more specific questions you
have:
Imaging Fundamentals
http://www.ni.com/vision/vdm.htm
It also discusses camera and lens selection with respect to
the image size and detail that you need.
Please let us know if you have any further questions related to this.
Regards,
Luke H

Euresys Picolo image acquisition and LabVIEW

Hi all,
Unfortunately I have bee asked to use a Euresys piccolo image acquisition card in LabVIEW. I my case I only need to display the image on / on top of a LabVIEW front panel. Yes – I know it would have been much better to use an NI card but sometimes other people........
Anyway my question is - has anyone out there managed a reliable interface to the piccolo dll yet? I’ve been looking at the ActiveX interface but it looks like an exceptionally tricky job. I see there are few previous discussions that will be of help should I have to start from a blank VI.
Any advice appreciated,
-Martin
Certified LabVIEW Architect

Hi Martin
I have had a look for you this afternoon to see if I can find an example for you as to how to communicate to you Euresys frame grabber in LabVIEW but an example or driver is not available. It should though be possible to comunicate with your board using the manufacturers dll. You mentioned that you were aware of other forum posts that will be helpful in you starting to develope you code but I thought it might be helpfull to post some links below.
Forum posts:
Is it possible to use Euresys Picolo card with IMAQ vision and LabView?
activex help!!!
calling picolo.dll in Labview
Other Resources
Using External Code in LAbVIEW
Integrating External Code with the Import Shared Library Wizard
I hope this helps

Image acquisition not functioning after upgrading computer

Hi all,
I've run into a bit of a snag with our LabVIEW program. This program was written by someone that no longer works at my company and his VI scripts and installer do not exist, at least no where that we can locate. We've migrated the executable as well as the LabVIEW runtime environment over to a new Windows 7 PC (the original computer was running Windows XP). The program loads as it should but when it comes to the image acquisition within the program, the camera image is garbled and basically useless.
Using NI MAX, I am able to detect the camera and I can set it to the settings from the original PC but the image is even scrambled inside NI MAX. The camera in question is an ATV Oscar F810C which is detected as such by NI MAX. I've updated the Vision runtime to the February 2014 build available on NI.com (about a 2GB download). Here are some screenshots of the original PC's settings in NI MAX:
In reality, the image in NI MAX should look like this:
On the new system with the same settings it looks like this:
And when running the program on Windows 7 it looks like this:
If I change the Video Mode to one of the lower res ones, such as the first greyscale 1024 x 768 option, the image stops being scrambled inside NI MAX and I'm able to see the image properly. However, the image acqusition inside the program still does the same thing. Without having any information on the contents of the program or access to the original files, it would appear to be some kind of driver issue since the setup works fine on the old system.
Any ideas on what may be the issue?

billko wrote:
It may be that you have to download a WIn7 driver for the camera. Dll(s) might be incompatible.
Sorry, I did not see that that was one of the first things you did.
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

IMAQ-continuous image acquisition for VB

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