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Looks good, Bob. Can I link to it from the Wiki?
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- Yesterday
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Writing the notes forced me to watch the videos closely. I'm going to use the notes as a quick-ref whilst getting started and hoped others might have a go if they had them too. Feel free to make changes/fix wrong stuff in whatever way you like - expect you're a busy man. I'm happy to own the doc and expand it given the info. It's written in libreoffice writer, which exports a good pdf. Now looking fwd to cooking up a few actors. LabVIEW_Messenger_Library_-_Programmers_Notes_v1.1.pdf LabVIEW_Messenger_Library_-_Programmers_Notes_v1.1.odt
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Object Tracking using Detection as ROI ref
Maurice Rahme posted a topic in Machine Vision and Imaging
Hello, I'm trying to implement an object tracking in LabVIEW. I've written a VI (attached) to detect and locate the centroid of elliptical shapes (because my circular subject can possibly be rotated and appear as an ellipse). However, the detection is not successful on every frame. For this reason, I would like to use the object detection method I've written as a ROI reference for an object tracker, whereby the object detector runs every 10-20 frames or so to make sure the tracker has not accumulated too much error. Any advice on how I can do this? Thanks! Additionally, any criticism or advice on my object detection method would be appreciated. Vision.vi -
Maurice Rahme joined the community
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Wow, 47 pages is more than I've ever written on Messenger Library. Please post it.
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Oh right, that's where I originally found this control, including the "(warning: dangerous)" text. I thought that might have been it; I know that node used to be "SuperPrivate" as you called it I've heard that "rusty nails" analogy many times before but I thought scripting wasn't considered part of the "attic" anymore, and wouldn't that include the New VI Object node? How did they create the control on the front panel prior to the existence of the scripting interface? I assume with some internal tool similar to my work-in-progress VILab?
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Dr James, I'm learning Messenger Library to see if it suits a software defined radio retirement project. To remind me of the basics, I've made a 47 page programmers note. It's free to you if that's useful, otherwise I will keep it private.
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Roman Plevnik changed their profile photo
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Their software library requires a license and there is no online documentation. Can you share more details?
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I need to access Aerotech A3200 data with LabView. The Digital Scope in the A3200 software has the capability to record data at 1kHz for 8 seconds in dedicated batches. We use LabView for all functions surrounding the motion control and have the Aerotech LabView package. Using the LabView vis we can only access data a single data point per call and I don't see how to set up a FIFO to Windows LabView. Someone must have looked at this problem lately. Can anyone steer me in the right direction? Thanks!!
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William Hofmeister joined the community
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The nodes are actually not private anymore but rather part of the scripting extension. Look for New VI Object and then there is an enum where you can select the object to create. The owner refnum obviously has to be the correct frontpanel or diagram refnum depending if the object is a diagram node or a frontpanel object and the object class refnum has to be compatible with the object too. Lots of preconditions that must be correct and therefore it's not really a tool for generic use at all. The enum for the PixMap has the same (warning: dangerous) message appended. Basically you are working here in the attic of LabVIEW and should accept that there are rusty nails that can stick out of the floor and walls and on which you can hurt yourself pretty badly if you don't watch out carefully. And don't run to mommy and rant about the evil LabVIEW engineers who left those rusty nails in there. You are not supposed to be in that attic at all, and if you go anyways assume the risks yourself! Basically any bug report about such features will be silently dropped in the round binder, you know the one where you also drop your dirty paper handkerchiefs and such stuff. 😃
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- Last week
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Byron Ganazhapa changed their profile photo
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What private nodes specifically?
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SpamChowder joined the community
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Hi everyone! I'd like to announce the launch of a new service that could be of interest to you. Over at Launcher while building a rocket engine we built a software workflow that worked so well we decided to turn it into a service. We call it CURVE. It’s a tool to visualize, share and manipulate DAQ data in the cloud. We make it easy to share your experiment results online, either privately with your team or for a public audience. We’ve just added support for National Instruments / LabVIEW TDMS files, so giving your experiment data a home online is as easy as drag & drop. We’re now looking for beta-testers, we’re offering a free year of usage after then end of the beta phase for our active early adopters. Check it out! Feel free to shoot me an email if you have any questions: paul@getcurve.io. Thanks for listening! Paul
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Bob Edwards G4BBY joined the community
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This existed back in LabVIEW 3 already (although you only could create it on a frontpanel with some super private nodes that came available with the new VI server interface in around LabVIEW 6 and crashed LabVIEW back then quite quickly too if you got that far) and I"m pretty sure it is from the Mac only version of LabVIEW alrady (2.x). In fact it seems like the bitmap edit control in the old icon editor, which looks exactly like that, but that icon editor was a dialog written in C inside the LabVIEW core. So while it is functional enough to be used with the LabVIEW internal C dialog API it obviously never received any extra love to adapt it to the property node interface that was later created and to make it useful as a generic LabVIEW control. Since the old default icon editor is still an option to choose, I'm sure that removing it from LabVIEW at this point is also not an option. But making it a fully public control is definitely also not going to happen. For this it is to limited in functionality to even spend half an hour to make it more functional.
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Set a default path when clicking path browse
Neil Pate replied to Neil Pate's topic in User Interface
The bug I mentioned is not in the LabVIEW control, it manifests in the Windows file explorer dialogue that pops up. -
Can't you use property node=>Path Text=>Scroll Position instead?
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Set a default path when clicking path browse
Neil Pate replied to Neil Pate's topic in User Interface
Thanks, thats what I ended up doing. It works ok but a Windows bug causes the text to be pushed out of the control, so I had to then applying this fix: http://etchingpathways.blogspot.com/2012/07/labview-simulating-keyboard-events.html -
I don't think there's a way to do it. You'll need to make your own browse button.
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Does anybody know if it is possible to configure the path control so that when a user clicks the browse button the file dialogue that pops up has a custom filename pre-populated? You can do this easily with the dialogue prim, but I cannot figure out how to do this with the path control. I thought perhaps there would be an event that is fired off on browse, but it does not appear so. I suppose I could hide the browse button and replace it with a regular button...
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Open Package Building Discussion
ShaunR replied to Rolf Kalbermatter's topic in Application Builder, Installers and code distribution
I don't care what version of .NET is required. All .NET is banned from my projects and some of my hair has grown back as a result I too have products in 2013 and have found it relatively stable. It was my next choice if I were to be dragged kicking and screaming from 2009 Anyone else prefer an earlier version than 2013? -
No Problem!
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STA changed their profile photo
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I think I must have had low glucose at the time (just before lunch). I should've created a simple example, but it turned out I was missing a input to my VI! Grrh! It's working now. Thanks for your help! Bruce
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How specifically are you trying to create the folder? I'm using LabVIEW 2016 on Windows 7 and just tried creating a folder named "Blah 1.1" on my desktop. I did it using the "Create Folder" node located in the "File I/O" >> "Adv File Funcs" palette and it worked for me. If you're using Windows 10 and LV 2017, I'm not sure if one of those could be the culprit.
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Playback file on cRIO
infinitenothing replied to Ratataplam's topic in Application Design & Architecture
Yes, what you're doing is super common. It might be worthwhile to use the TDMS file format instead of a spreadsheet file. It's a very easy format for recording and playing back data. I'm a little curious why you're using a CRIO. It's not a bad choice but something a CDAQ could be simpler. -
This seems like it should be easy, but I have not been able to create a folder that has decimal/period using LabVIEW. For example, creating a folder named "Blah 1.1" yields a folder named "Blah". I can create the folder directly in Windows so I know it is valid. Has anyone else seen this before? Thanks, Bruce
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Yeah I guess. For the record I have no need to use it or receive support for it; I was just curious.
