IMAQ ImageToArray.vi in installation of VDM2011

Hi,
I am trying to use a firewire camera (Dragonfly2 DR2), with a custom VI that uses sub vi's like "IMAQ ImageToArray.vi" and "IMAQ1394Snap.vi". I installed VDM2011, thinking this would contain the vi's I'm looking for. This proved not to be the case.
Where are these vi's, if not in the installation of VDM2011?
Thanks,
David
Solved!
Go to Solution.

Hi David,
Thanks for popsting. 2 quick comments...
1. I believe that the IMAQ 1394 vi is legacy (perhaps someone else can confirm this?) To acquire data from a firewire/1394/GigE/USB direct show camera, you require a function called IMAQdx Snap.vi
2. As you can see in the above screen capture, the IMAQdx Snap.vi is installed as part of the "Vision Acquisition Software"
NI Vision Acquisition Software
http://sine.ni.com/nips/cds/view/p/lang/en/nid/12892
Note that a license for this software is included with all NI vision hardware (NI Smart Cameras, vision systems, frame grabbers) and all NI vision software licenses (NI Vision Development Module and Vision Builder for Automated Inspection licenses including run-time licenses).
Rich R
Applications Engineer
National Instruments UK & Ireland

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IMAQ ImageToArray VI I16 ouput stop working

Has anyone encountered problem with the IMAQ ImageToArray VI such that the I16 output stop working suddenly. The U16 is working fine though.
Solved!
Go to Solution.

Hi,
Could you elaborate a bit on your problem? Did you previously have the IMAQ ImageToArray VI working with an I16 output, but now it no longer works? Is there a broken wire coming from the output? What changes were made since it was working? This information should help us hone in on the issue. In the meantime I found a forum pertaining to a similar issue (http://forums.ni.com/t5/LabVIEW/IMAQ-quot-image-to-array-quot-directly-wired-to-quot-array-to/td-p/2...). Have a great day!
Kale W.
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[email protected]

IMAQ ImageToArray returns NaN in LabVIEW 7.0

I wrote a VI to quantify an image using both LabVIEW 5.1 and IMAQ Vision 5.0. Recently I upgraded to LabVIEW 7.0. When I tried to run my VI, it worked well sometimes but very often, the data values were returned as NaN. Upon checking, I realized the problem lies with the IMAQ ImageToArray subVI. When I tried to convert an image to array, it sometimes return NaN. Can anyone help me with this problem? I am still using Vision 5.0.
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That is a directory that may not be on your system due to the version of IMAQ Vision that you have.
I have attached the LLB to this post in case you cannot locate it.
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Attachments:
Convert_VI_to_use_LabVIEW_7_Image_Datatype.llb ‏548 KB

IMAQ AVI read frame performance

I've been playing around with the read AVI with buffer example in the Developer Community. It reads all the frames of an AVI into memory and then plays them back at the appropriate frame rate. This works ok with very small AVI files but with anything larger it gets slower and slower until it almost stops loading the AVI. At that point it seems to be loading less than 5 frames per second and is killing my cpu. I have plenty of free RAM during this.
https://decibel.ni.com/content/docs/DOC-8479
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Attachments:
image_png.png ‏77 KB

VTKim wrote:
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One thing we could implement is a compression filter that is on the IMAQ AVI Create VI used in conjunction with the IMAQ AVI Get Filter Names VI. Also, what is the RAM available on your computer and what size images are you acquiring and saving to AVI? Thanks!
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Thanks for replying. I'm running labview 2009 on a dual core pentium 2.3 GHz with 4 Gigs of ram. It typically has 2 Gigs free while running the program.
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IMAQ Resample performance. Any better choice for 50% downsample? (average 2x2 - 1 pixel)

My video source is a 4 Mpixel (2k x 2k resolution) USB3 camera. This is displaying a live image OK in Labview at 45 fps using only 20% CPU. So far, so good.
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Hi jbeale1,
In NI-MAX (Measurement & Automation Explorer) select your camera. Under the 'Acquistion Attributes' tab do you see an option to change the Video Mode of your camera to a different resolution? If your camera supports it, it would be more efficient to change the resolution there.
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http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_resample/
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How to set the User rights to use DAQ/IMAQ in WinXP as general(=limited) user

When I install Software, written in LabVIEW (build an executable/installer), as administrator it works fine. But when I switch over to a user account with limited rights (we are talking about WinXP) it will not run and gives error messages. It happend to me at two almost the same computers, one with a DAQ-board, and one with an IMAQ-board. (At the computer with IMAQ1411 -> I also checked MAX -> errors/no access.) What to do?
Attachments:
DAQ_example.JPG ‏9 KB
IMAQ_example.JPG ‏15 KB

Hello,
I investigated the issue further. To work around this problem you should add write permissions to the C:\Program Files\National Instruments folder. Be sure that all subfolders and files are awarded write permission. This should solve your problems. eventually you could break it up to one file which must be set to write permission but by setting the whole folder to write permission you solve this problem for many other drivers to so you would not run into this everytime you use different hardware.
Best regards,
RikP
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Rik Prins, CLD
Applications Engineering Specialist Northern Europe, National Instruments
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Hi,
I'm currently trying to set up 2 usb webcams (logitech quickcam for notebooks pro). I want to be able to have them both run simultaneously and do some image processing with the images that I get from both cameras with labview and imaq vision.
As of right now, I'm having trouble getting both cameras to run at the same time. Any help would be gladly appreciated. Thanks.

The USB IMAQ driver will not support running 2 USB cameras at a time (I believe it is a limitation of the DirectShow interface). You could open one camera, acuqire an image, close the reference to that camera and then do the same for the second camera.
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Help me to do this "IMAQ"-1

Dear friends
Please go through this vi
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i want both to be done in a same window i want to put a multiple square box and the pixel values i want to extract seperately for the individual boxes. please help me give some ideas how to do this please modify this vi.
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Attachments:
mult sqr.vi ‏123 KB

Please refer to this duplicate post for response:
http://forums.ni.com/ni/board/message?board.id=170&message.id=105711

Help me to do this "IMAQ"-2 image file attached

Dear friends
In this i attach my image file in Tif format & jpeg format
Please go through this vi
this vi it will display a image window when u click inside that window a square box will create, where ever u click it will create multiple box. i used imaq windraw function, u can see another image window in the front pannel also.
now my aim is to put a box over that spot with the spot as center and to extract the pixel values of the individual boxes,
now whats happening is when i run this program a image window is opening from the imaq windraw function in that 1ly i can able to put multiple box but that box is displayed in the image display in the front pannel also. but i cant put the box in the image window in the front pannel. if u click the mouse in the image window in the front pannel it will display the 25x25pixel values.
i want both to be done in a same window i want to put a multiple square box and the pixel values i want to extract seperately for the individual boxes. please help me give some ideas how to do this please modify this vi.
thank u
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Attachments:
1.zip ‏279 KB

Sasi,
I am a little confused on what exactly you want to do and why you are using both WinDraw and an Image Display Control to show the image. It sounds like what you want to be able to do are the following 3 things:
1) Display the Image
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I have attached an image of a block diagram, which is what I think that you are trying to do. In the block diagram you can see that I have combined everything into one case structure so that whenever a user clicks on the Image Display (no WinDraw) then I add a rectangle overlay to my image and also get the pixel values for that area. If you want to keep track of the pixel values for each rectangle then you could use a shift register and build up a 3-D array with all of this information ... or write the data to file ... or use another method to keep that data for future use.
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Error -1074397038 occurred at IMAQ Start.vi for 64bit Labview 2011 SP1, Win7

Hello,
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Thanks
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David Dulin

This forum post is already handled --> SR 1154262.
Kind regards,
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What datatype should i use to store imaq image in sql database?

Hi there i am thinking of saving the imaq image into database for retrieval in my website so that it's like a stream but i don't like what datatype does labview store the image as.

You have two options for storing images in a relational database:
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Multiple IMAQ version on single computer

I have a number of cameras that I work with - mostly CameraLink, but one LVDS. I'd like to be able to develop and test these from one machine, but there is a bug in more recent versions of IMAQ that cause the camera data to be delayed and/or shifted (I found this out through e-mail correspondance with one of NI's support people). For the CameraLink, I'd like to use the most recent version of IMAQ. What would be the best way to have both version accessible on one computer? Can I install them to different user accounts, so they are only accessible to a single user? Would the only way to do this be to dual-boot?
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Gard
Solved!
Go to Solution.

Try to install them on different user accounts in single boot system.
Sasi.
Certified LabVIEW Associate Developer
If you can DREAM it, You can DO it - Walt Disney

How can I display the length of the yet unfinished line that a user is drawing in the image using the line tool of the IMAQ tool palette.

Is this really not possible using standard Labview/Vision YI`s?

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How can I use or convert a imaq image to plot images back on waveform graph

Hi
I am currently opening and manipulating (rotate and resize) a PNG image using IMAQ Vision in LabView 8.2.1 This works well and I can display the Image on the front panel using a IMAQ Image Control.
In addition to this I would now like to display the image as a background on waveformgraph. I can do this with the original PNG file by reading it and then flatten it to a pixmap ie make it a Picture but this is of little use as I need to use the manipulated IMAQ image.
Therefor I would like to know how to convert the manipulted IMAQ Image to right Picture Format (without resaving) in order to use it on the PlotImages.Back property node of a wavefrom graph.
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Hi Randall
Apologies for replying somewhat late but I have been out of the office for a few days.
Your suggestions and code helped me greatly and led to solving my query so thank you for that.
There is one more thing (well many many more but I will place new posts for those however that you might be able to answer for me.
Following your suggestion to use the image to array function I searched through more examples and found the code that did exactly what I wanted to do. Please see attached.
In this code a For loop is used to add 65793 to the color table. It works very well but I do not know why it is used exactly. Can you exlplain? I also realize I never made it clear that I use grayscale PNG files rather then color images.
Thanks again for your excellent help, it is much appreciated.
Attachments:
IMAQ_8-bit_to_picture v1.vi ‏15 KB
Test Image.png ‏42 KB

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Birgit,
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IMAQ ImageToArr​ay.vi in installati​on of VDM2011

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IMAQ ImageToArray.vi in installation of VDM2011