NI Vision Assistant - "Create LabVIEW VI" produces a blank VI

Hello, I'm using:
- LabVIEW 2011 SP1 v11.0.1 32bit
- Vision Assistant 2011 SP1 Build 20111212112331
When I create a simple script in Vision Assistant and click on "Create LabVIEW VI", the VI file is created, but when I open it, I can only see a blank VI.
I really hope someone could help me, I don't know how to solve this problem.
If you need more informations, I'll provide them.
Thank you!

Hi Claudio, I added the following Express VI in a blank block diagram, like you suggested:
"Prompt User for Input"
"Vision Acquisition"
No error messages appeared after having placed them in the block diagram, or after their configuration.
However, if I place a "Vision Assistant" Express VI, I still receive the following message error after having configured it:
"There was an error in the process of creating the Express VI's code"
Moreover, I tried to repair the following modules, in sequence:
NI Vision Common Resources 2011 SP1 f1
NI Vision Assistant 2011 SP1
NI Vision 2011 SP1
For each of the 3 reparations, I had to reboot the PC. However, the problem hasn't disappeared, I'm still unable to generate a VI by using Vision Assistant.
I really hope to solve this annoying problem, because the day of my exam is getting closer... so suggestions are more than appreciated, at this point I don't know how I could fix that.
In attachment you can find a simple Vision Assistant script, and the blank VI produced. Please note that Vision Assistant always produces a blank VI, no matter of the script, like I stated earlier.
A final note, I tried to generate C and .NET code for the script in attachment while using Vision Assistant, and it seemed to work (no message errors or blank C/.NET files produced), so this is a problem related to LabVIEW code generation only.
Attachments:
Simple_script_but_still_not_able_to_produce_a_VI.vascr ‏2 KB
Blank_VI_produced_by_Vision_Assistant.vi ‏5 KB

Similar Messages

Vision assistant in LabView

Dear All,
I am not that familiar with LabView yet, and would really appreciate some help.
I have attached to this message three documents. the first one represents the block diagram of how I can use a few tools from labview with my thermal camera. All this works fine for this one. The second one, is a tool developped from Vision Assistant, but created as a LabView VI, so same in the block diagram. And in the third one, is the block diagram of the two (the first which corresponds to image and few data from the camera, and the second one the tool developped in Vision assistant) together. Bacsically my question is, could you help me or show me how to link the two, so that I can use the tool developped in Vision Assistant with my image from the thermal camera (file 1). Link file 1 and 2 together basically.
Many thanks for your time
reivaxseniab
Solved!
Go to Solution.
Attachments:
GetImageExample.vi ‏32 KB
trial 1.vi ‏68 KB
trial 2.vi ‏94 KB

Hi Xavier,
I am not really sure what you mean by it doesn't seem to work, it looks to me like the VISA reference wire is going into the "Close.vi" fine, are you referring to how there is a broken run arrow up the top left of the program, not allowing your program to run?
If you click on that broken run (or hit ctrl+r) arrow it will automatically give you an error list of items to fix like the first attachment.
In your case you wont have the errors where subVI's are missing, but you will have the errors of tunnels not being wired together correctly, if you double click on that error it should take you to the area on your block diagram where the error occurs. Your VI's have a couple of tunnels hidden behind each other like the second attachment.
You may want to move these out from each other so that they are easier to wire into individually, like the third attachment.
You want to make sure that each of these terminals have data wired in to them in each one of your cases so that they do not appear as an empty shell, but as a solid colour.
These links are good for understanding case structures and terminals a bit more.
These are all subjects covered in LabVIEW Core 1, I would suggest Xavier that if you are looking to use LabVIEW more in the future it is often more beneficial to sit down and dedicate three days to learning these principles with exampls and excercises than struggling to piece together code, if you're an academic in the UK training is at a discounted rate. Let me know if you're interested.
Best regards,
Mark W
Applications Engineer
National Instruments UK & Ireland
Attachments:
Error list.PNG ‏33 KB
Terminals clumped.PNG ‏2 KB
Terminals neat.PNG ‏2 KB

NI Vision Builder vs. LabVIEW RT + NI Vision Assistant

Hello
I’m designing a vision application which should be able to run stand-alone (EVS-1463RT). The app will have up to 30 inspection states (read gauge value, checking for the presence specific objects, etc.) approximately. The second requirements are the communication ability with other devices not NI via TCP/IP and logging pictures in FTP.
Now I’m thinking about the two possible solutions.
Create an AI with NI Vision Builder
Create LabVIEW RT app and with using NI Vision Assistant build inspection states
A have to say that the first solution is not my favorite because I tried to implement the TCP/IP communication in NI Vision Builder and it was function but the using of the server is limited. In the other hand the building the inspection is “easy”.
The second solution has following advantages for me: better control of the app, maybe better possibility to optimize the code, implementation my own TCP/IP server. My biggest concern is the using NI Vision Assistant to generate the inspection states.
In conclusion I have to say that I’m not experience in the vision app but the LV RT is no problem for me.
Thanks for any opinions
Jan

Hi Jan,
> A have to say that the first solution is not my favorite because I tried to implement the TCP/IP communication in NI Vision Builder and it was function but the using of the server is limited.
Could you give more feedback on this point? What do you mean by "using of the server is limited". More precise feedback and suggestions would help us improve the functionality.
What I would recommend you look into is the use of the VBAI API. You can find examples in <Program Files>\National Instruments\<Vision Builder AI>\API Examples\LabVIEW Examples
This features allows you to run VBAI inspection within your LabVIEW application, an retrieve results that you can send using a TCP implementation of your own in LabVIEW, without having to use the VBAI TCP functionality.
You retain the configuration feature of the Vision part of the application, and can add extra code in LabVIEW.
The API functions allow to basically open an VBAI inspection file, run it synchronously or asynchonously, and retrieve images and results.
As you mentioned, the other solution is to implement your state diagram in LabVIEW and use the Vision Assistant Express VI in different states. What VBAI give you that Vision Assistant doesn't is the pass/fail limits for each step (and the state diagram).
Best regards,
Christophe

1074396080 error in VI created by Vision assistant But no err in single stepping

I occasionally get 1074396080 error while runing a Labview VI "created" by NI Vision Assistant 8.0. When i don't get the error the caliper readings are wrong but while single stepping no error comes up and the caliper results are correct.

Hello apurva062,
Thank you for using National Instruments discussion forums. The error you are receiving deals with incompatible data types. Most likely in the Vision Assitant script you are testing the script using a test image that is in the right format but in the LabVIEW VI you are acquiring the image in a different format (for example wrong bit depth). How are you acquiring your images in LabVIEW? Are there any other differences between Vision Assistant and LabVIEW? If you want to post the Vision Assistant script you are using I can take a look at it. Thanks and have a great day.
Regards,
Mark T
Applications Engineer
National Instruments

Profile Performance in LabVIEWvs Performance meter in Vision Assistant: Doesn't match

Hi everyone,
I faced a strange problem about performance timing between these two measurements.
Here is my test
-used inbuilt example provided by labview in vision assistant-Bracket example-Uses two pattern matches, one edge detection algorithm and two calipers(one for calculating midpoint and other for finding angle between three points.
-When i ran the script provided by NI for the same in vision assistnat it took average inspection time of 12.45ms(even this also varies from 12-13ms:my guess is this little variation might be due to my cpu/processing load).
-Then i converted the script to vi and i used profile performance in labview and surprisingly it is showing way more than expected like almost ~300ms(In the beginning thought it is beacuse of all rotated search etc..but none of them make sense to me here).
Now my questions are
-Are the algorithms used in both tools are same? (I thought they are same)
-IMAQ read image and vision info is taking more than 100ms in labview, which doesn't count for vision assistant. why?( thought the template image might be loaded to cache am i right?)
-What about IMAQ read file(doesn't count for vision assistant?? In labview it takes around 15ms)
-Same for pattern match in vision assitant it takes around 3ms(this is also not consistant) in labview it takes almost 3times (around 15ms)
-Is this bug or am i missing somethings or this is how it is expected?
Please find attachments below.
-Vision Assistant-v12-Build 20120605072143
-Labview-12.0f3
Thanks
uday,
Please Mark the solution as accepted if your problem is solved and help author by clicking on kudoes
Certified LabVIEW Associate Developer (CLAD) Using LV13
Attachments:
Performance_test.zip ‏546 KB

Hmm Bruce, Thanks again for reply.
-When i first read your reply, i was ok. But after reading it multiple times, i came to know that you didn't check my code and explanation first.
-I have added code and screenshot of Profile in both VA and LabVIEW.
In both Vision Assistant and Labview
-I am loading image only once.
Accounted in Labview but not in VA, because it is already in cache, But time to put the image into cache?
I do understand that, when we are capturing the image live from camera things are completely different.
-Loading template image multiple times??
This is where i was very much confused. Beacuase i didn't even think of it. I am well aware of that task.
-Run Setup Match Pattern once?
Sorry, so far i haven't seen any example which does pattern match for multiple images has Setup Match Pattern everytime. But it is negligible time i wouldn't mind.
-Loading images for processing and loading diffferent template for each image?
You are completely mistaken here and i don't see that how it is related to my specific question.
Briefly explaining you again
-I open an image both in LabVIEW and VA.
-Create two pattern match steps. and Calipers(Negligible)
-The pattern match step in VA shows me longest time of 4.65 ms where as IMAQ Match pattern showed me 15.6 ms.
-I am convinced about IMAQ Read and vision info timing, because it will account only in the initial phase when running for multiple image inspection.
But i am running for only once, then Vision assistant should show that time also isn't it?
-I do understand that, Labview has lot more features on paralell execution and many things than Vision Assistant.
-Yeah that time about 100ms to 10ms i completely agree. I take Vision Assistant profile timing as the ideal values( correct me if i am wrong).
-I like the last line especially, You cannot compare the speeds of the two methods.
Please let me know if i am thinking in complete stupid way or at least some thing in right path.
Thanks
uday,
Please Mark the solution as accepted if your problem is solved and help author by clicking on kudoes
Certified LabVIEW Associate Developer (CLAD) Using LV13

Vision Assistant Password

Hallo,
ich benutze LabView 2011 in Verbindung mit Vision Assistant. Ich möchte das Bild von einer Intelligenten Kamera (Sensopart Visor V10) gerne über Ethernet mittels Vision Assistant in LabView einlesen.
Jedoch habe ich das Problem, dass ich diese Kamera im Vision Assistant nicht ansprechen kann. Nach Eingabe der IP-Adresse wird ein Passwort gefordert, welches aber nicht vergeben wurde.
Gibt es ein Standart-Passwort, wechles ich benutzen muss?
Hello,
I'm using LabView 2011 with Vision Assistand. I want to read in the image of a smart camera (Sensopart Visor V10) by using Ethernet and Vision Assistant.
However, I have a problem that I can't access this camera in Vision Assistant. After entering the IP address, a password is required, which was not awarded.
Is there a standard password, wich I have to use?

Hi,
see related post "Vision Assistant Password":
http://forums.ni.com/t5/Machine-Vision/Vision-Assistant-Password/m-p/1987627
Best regards
Suse
Certified LabVIEW Developer (CLD)

So I want to use an imaging device with Vision Assistant then incorporate that into my LabView 8.6 code. How can I do this?

So here's what I have so far written, I have LabView program to interface with my microscope stage, autofocus. I want to try now to interface the camera using Vision Assistant.
The procedure I want the program to perform is taking this CR-39 detectors and placing them on this stage and the camera to take images of this detector frame by frame. So I want the program to go to the very top corner of the detector on the stage. Then the camera would autofocus (if needed) and take an image. So this would take an image for every micron of the detector on that row. Then move to the next and so on. Until it has successfully imaged the whole detector. Is anyone well versed on Vision Assistant and willing to give some advice on this? It would be greatly appreciated.
The purpose is eliminate the previous method of acquiring images by manually focusing on the tracks created by the particles. I want to this program to run itself without a user being present, so just pressing a button would send the program into autopilot and it would perform the procedure.
What are CR-39 detectors?
Allyl Diglycol Carbonate (ADC) is a plastic polymer. When ionizing radiation passes through the CR-39 it breaks the chemical bonds of the polymer and it creates a latent damage trail along the trajectory of the particles. These trails are further ethced using a chemical solution to make the tracts larger which can finally be seeing using an optical microscope.
Thank you,
HumanCondition

Hi Justin,
Yes I already have a vi that controls the stage.
So the camera is stationary above the stage. Now what I want to do is get the camera to take the pictures of the detector by moving the stage frame by frame for example starting from the top right corner of the detector (by taking an image) then ending on the top left corner of the detector (by taking an image) then having the stage move down a row and starting the process over again until each frame (or piece) has been imaged.
My goal is while the stage is moving to every little frame of the detector I would like for it to autofocus if necessary, and take a image to be for each frame of the detector.
Using the auto focus requires the moving of the stage up and down.
HumanCondition

Vision DevMod: How to create large Gaussian filter kernels with integer values like Vision Assistant uses

Hello,
in Vision Assistant it is possible to create filter kernel of arbitrary size, like e.g. a 75x75 Gaussian kernel. These kernels feature integer-only elements. I tried to find a function in the Vision Development Module, but have been unable to find something so far. So I still create a Vision Assistant script with such a kernel and export it to a LabVIEW VI in order to abtain such a kernel. Any ideas on how to create such kernels programmatically?

-You can generate custom kernels in LabVIEW also, but you need to have either string or numerical of that kernels. Without these two, i am not sure of how to do this.
-Please check this for building kernels.
http://zone.ni.com/reference/en-XX/help/370281M-01/imaqvision/imaq_buildkernel/
-Let's say you are able to programmatically generate kernel string, it will convert to kernel in double format automatically and connect this to convolute vi.
Thanks
uday,
Please Mark the solution as accepted if your problem is solved and help author by clicking on kudoes
Certified LabVIEW Associate Developer (CLAD) Using LV13

How do you track a moving object using Labview and Vision Assistant

I am using Vision and Labview to create a program that tracks and follow a moving object using a high end camera. Basically what it does is it detects a foreign object and locks on to it and follows it where ever it goes in a control sized room.
I have no idea how to do this. Please help. Or is there an available example.
Thanks.

Hello,
It sounds like you want to look into a Vision technique called Pattern Matching. Using our Vision tools, you can look for a image, called a template, within another image. Vision will scan over the entire image of interest trying to see if there are any matches with the template. It will return the number of matches and their coordinates within the image of interest. You would take a picture of the object and use it as the template to search for. Then, take a picture of the entire room and use pattern matching to determine at what coordinates that template is found in the picture. Doing this multiple times, you can track the movement of the object as it moves throughout the room. If you have a motion system that will have to move the camera for you, it will complicate matters very much, but would still be possible to do. You would have to have a feedback loop that, depending on where the object is located, adjusts the angle of the camera appropriately.
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If you have Vision Assistant, you can use this to set up the pattern matching sequence. When it is complete and customized to your liking, you can convert that into LabVIEW code by navigating to "Tools » Create LabVIEW VI..." This is probably the easiest way to customize any type of vision application in general.
I hope this helps you get started. Take care and good luck!
Regards,Aaron B.
Applications Engineering
National Instruments

LabVIEW Vision Assistant的图像处理,NI视觉助手教程免费阅读

附件里面比较全，因为发不了那么多字
http://shixinhua.com/ 石鑫华主页
http://shixinhua.com/imganalyse/2013/09/762.html 全文网站
《基于Vision Assistant的图像处理是实用教程》
第二章界面与菜单       67
第一节启动欢迎界面 67
http://shixinhua.com/imganalyse/2013/01/278.html
第二节功能界面 73
http://shixinhua.com/imganalyse/2013/01/280.html
Acquire Images采集图像界面       73
Browse Images浏览图像界面       77
Process Images处理图像界面       79
第三节 File文件菜单    86
http://shixinhua.com/imganalyse/2013/01/283.html
Open Image：打开图像          86
Open AVI File：打开AVI文件         87
Save Image：保存图像 87
New Script：新建脚本   91
Open Script：打开脚本 92
Save Script：保存脚本   92
Save Script As：脚本另存为 93
Acquire Image：采集图像     93
Browse Images：浏览图像   93
Process Images：处理图像   94
Print Image：打印图像 94
Preferences：优先参数选择 95
Exit：退出       97
第四节 Edit编辑菜单   97
http://shixinhua.com/imganalyse/2013/01/284.html
Edit Step：编辑步骤       97
Cut：剪切       97
Copy：复制     98
Paste：粘贴   98
Delete：删除 98
第五节 View查看菜单 98
http://shixinhua.com/imganalyse/2013/01/286.html
Zoom In：放大        99
Zoom Out：缩小     99
Zoom 1:1：原始图像      99
Zoom to Fit：适合窗口 99
第六节 Image图像菜单        99
http://shixinhua.com/imganalyse/2013/01/288.html
Histogram：直方图 101
Line Profile：线剖面图   101
Measure：测量      101
3D View：三维视图        101
Brightness：亮度   102
Set Coordinate System：设置坐标系    102
Image Mask：图像掩码         102
Geometry：几何    102
Image Buffer：图像缓存        102
Get Image：获取图像   102
Image Calibration：图像标定        102
Image Correction：图像修正         102
Overlay：覆盖         102
Run LabVIEW VI：运行LabVIEW VI       103
第七节 Color彩色菜单 103
http://shixinhua.com/imganalyse/2013/01/289.html
Color Operators：彩色运算 104
Color Plane Extraction：彩色平面抽取          104
Color Threshold：彩色阈值   104
Color Classification：彩色分类      105
Color Segmentation：彩色分段     105
Color Matching：彩色匹配    105
Color Location：彩色定位      105
Color Pattern Matching：彩色模式匹配       105
第八节 Grayscale灰度菜单 105
http://shixinhua.com/imganalyse/2013/01/291.html
Lookup Table：查找表    107
Filters：滤波 107
Gray Morphology：灰度形态学     107
Gray Morphological Reconstruction：灰度形态学重建        107
FFT Filter：快速傅立叶变换滤波 107
Threshold：阈值     107
Watershed Segmentation：分水岭分割        107
Operators：运算    107
Conversion：转换 107
Quantify：量化       108
Centroid：质心       108
Detect Texture Defects：检查纹理缺陷       108
第九节 Binary二值菜单        108
http://shixinhua.com/imganalyse/2013/01/293.html
Basic Morphology：基本形态学    109
Adv. Morphology：高级形态学      109
Binary Morphological Reconstruction：二值形态学重建     109
Particle Filter：粒子滤波        109
Binary Image Inversion：二值图像反转        110
Particle Analysis：粒子分析 110
Shape Matching：形状匹配 110
Circle Detection：圆检测       110
第十节 Machine Vision机器视觉菜单 110
http://shixinhua.com/imganalyse/2013/01/295.html
Edge Detector：边缘检测     111
Find Straight Edge：查找直边        112
Adv. Straight Edge：高级直边        112
Find Circular Edge：查找圆边        112
Max Clamp：最大卡尺 112
Clamp(Rake)：卡尺（耙子）         112
Pattern Matching：模式匹配         112
Geometric Matching：几何匹配   112
Contour Analysis：轮廓分析 112
Shape Detection：形状检测 112
Golden Template Comparison：极品模板比较     113
Caliper：测径器、卡尺 113
第十一节 Identification识别菜单         113
http://shixinhua.com/imganalyse/2013/01/296.html
OCR/OCV：光学字符识别     114
Particle Classification：粒子分类 114
Barcode Reader：条码读取 114
2D Barcode Reader：二维条码读取     114
第十二节 Tools工具菜单      114
http://shixinhua.com/imganalyse/2013/02/297.html
Batch Processing：批量处理          114
Performance Meter：性能测量     120
View Measurements：查看测量   120
Create LabVIEW VI：创建LabVIEW VI代码 121
Create C Code：创建C代码 121
Create .NET Code：创建.NET代码        122
Activate Vision Assistant：激活视觉助手     123
第十三节 Help帮助菜单       124
http://shixinhua.com/imganalyse/2013/02/298.html
Show Context Help：显示上下文帮助 124
Online Help：在线帮助 125
Solution Wizard：解决问题向导   125
Patents：专利         125
About Vision Assistant：关于视觉助手         125
第三章采集图像 126
第一节 Acquire Image采集图像 127
http://shixinhua.com/imganalyse/2013/02/299.html
第二节 Acquire Image(1394,GigE,or USB)采集图像（1394、千兆网、USB） 128
http://shixinhua.com/imganalyse/2013/02/301.html
Main选项卡   129
Attributes属性选项卡   138
第三节 Acquire Image(Smart Camera)从智能相机中采集图像 143
http://shixinhua.com/imganalyse/2013/02/302.html
第四节 Simulate Acquisition仿真采集 145
http://shixinhua.com/imganalyse/2013/02/304.html
第四章浏览图像 150

Wetzer wrote:
You can think of the purple "Image" Wire as a Pointer to the Buffer containing the actual Image data.
That's what I thought too, but why would it behave differently during execution highlighting? (sorry, I don't have IMAQ, just curious )
LabVIEW Champion . Do more with less code and in less time .

NI Vision Assistant trial version doesn't allow LabView code generation

Hi,
I am trying to evaluate NI Vision Assitant 8.5. When I attempted "Create LabView VI..." available in the 'tools' menus I get an error message indicating that it needs LabView 7.1 or higher and IMAQ Vision 8.2.1 or higher. As I already have necessary LabView versions I downloaded IMAQ Vision 8.2.1 from NI web site but it appears IMAQ is not availabe for trial. It asks for an activation code which I dont have. Are there any trial codes availabe for NI IMAQ Vision 8.2.1 or higher?
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Hi manyam,
NI IMAQ Vision (I presume you mean NI Vision Acquisition Software) contains three drivers (IMAQ, IMAQdx, and IMAQ I/O), only one of which requires a license (IMAQdx). You should be able to evaluate NI Vision Acquisition Software for 30 days by skipping the activation when it prompts. Was this option available?
Bill E. | Applications Engineer | National Instruments

Where can I get detailed documentation on the 'IVA' vision vi's created by NI Vision Assistant

I use the NI Vision Assistant a lot. Usually I ask it to create a vi automatically from the script. However, the resulting vi contains several 'IVA' vi's that are completely undocumented (from what I can see).
Where can I get more info on these? Examples of these are IVA Grayfilters - Nth order.vi and IVA Store Particles Results.vi (two of many such vi's) . They look like very useful and interesting functions but what exactly they do I can only guess.
Any ideas where I can get information on these functions.

I really appreciate your offer to help, however, it would probably be better for me in the long run if I could get this info from the official help on these functions?
But as an example, currently I am wondering what does IVA store particle results.vi do? It is called after IMAQ particle analysis.vi but just seems to be wasting precious processor resources. When do I need to include this (as is done by default by vision assistant) and when can I cut it out? It must have some purpose but who knows what this might be?
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Labview Vision Assistant Histogramm Problem

Good Morning,
i sadly with the Vision Package from Labview. I want to load a picture and interpretation a detail of the picture with black, white and grayvalve. This can i make with the Vision Assistant feature Histogramm. When i build it (the VI with Vision Assistant) comes nothing to the output Histogramm. I have checked the output line Histogramm, but nothing goes out of this.What are my failure?
Thanks a Lot
german translation:
Hallo zusammen,
ich bin leider noch nicht richtig mit dem Vision Paket vertraut. Ich möchte die Schwarz, Weiß und Grauwerte eines Bildausschnittes auslesen und diese auswerten können. Dank des Vision Assistant, kann ich dies per Mausklicks erzeugen, jedoch erhalte ich am Ende des Vis keine Daten. Selbst wenn ich die Quelle verbinde und ein Anzeigeelement hinzufüge, kommt hinten nichts raus. Was ist mein Fehler?
Vielen Dank
-motecpam
Labview Vision 2011 Servicepack 1
with Vision Development Modul
Attachments:
Screenshot_VI.jpg ‏230 KB
Screenshot_Vision_Assistant.jpg ‏313 KB

Hallo Tropper,
vielen Dank erstmal für die Antwort.
Leider erhalte ich dennoch keine Ausgabe am Histogramm.
Das Histogramm wird mir leer angezeigt.
Ich habe es so erstellt, wie von dir gezeigt.
Attachments:
Unbenannt.jpg ‏117 KB

I am using Pattern matching using vision assistant . its able to detect the temple which created while configuration

Hi all ,
i am using vision assistant to do patten matching . its able to find the pattern with created template in vision assistant .
if i load some other pattern is not detecting ..
i have attached my vi file
Attachments:
PM_light.vi ‏266 KB

Hi all ,
i am using vision assistant to do patten matching . its able to find the pattern with created template in vision assistant .
if i load some other pattern is not detecting ..
i have attached my vi file
Attachments:
PM_light.vi ‏266 KB

Vision assistant or builder tools into LabView

hi, I just wanted to know if anyone knew how to use a vision assistant or vision builder into labView using a live image from a camera, that is already installed as a visa resource. Cheers

Hi reivaxseniab,
I think the best place to start would be one of the tutorials (link below).
http://digital.ni.com/manuals.nsf/websearch/7449F8D894ED3F9D8625745100771596
This should help you with using a live image from a camera in LabVIEW.
Kind regards,
Josh E
Applications Engineer
National Instruments UK & Ireland

NI Vision Assistant - "Create LabVIEW VI" produces a blank VI

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