Can a Vision image display's "zoom to fit" action be seen by an event structure?

The "Image Display" indicator from the "Vision" palette has a right-click (context) menu option of "Zoom to Fit".
Is there any way to capture the selection/execution of this action with an event structure?

I don't believe there is a way to do this with an event structure. However, there is an image window property node for the zoom to fit option. You can wire the output boolean into the input of a case structure and execute a different set of code depending on whether or not the zoom to fit option is selected. This should give you the same functionality as an event structure. Please let me know if you have any further questions.
Regards,
Chris L
Applications Engineer
National Instruments
Certified LabVIEW Associate Developer

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When I buid an application, the vision image display is black.

Hello !
I have made an application using "vision image display". I have labview 7 express and vision builder 6.0. On labview, my application run very well and my image is displayed.
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Hello,
I have a few questions concerning the problem. Where does the image come from, is it read in or is it from the harddisk. When the image is read in, which hardware do you use? I think you taked off the lens aperture and checked the contrast!? Check if the "vision image display" is correct licensed. Which Version is used from the "vision image display"? You can also check, when there is used any hardware if the drivers are the same on both systems. The current version is 2.6. With your answers, we should get a solution for the problem.
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Bruce Ammons
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The IMAQ Display control is a part of the NI-IMAQ driver. This driver is free of charge and can be downloaded from our website by going to www.ni.com/download. Here is a URL directly to the current version of IMAQ: "http://digital.ni.com/softlib.nsf/websearch/CD7EAFE90E9E47398625703000754A12?opendocument&node=132060_US". If you plan on using that control, I would recommend just installing the driver for it on whatever computer you want to use it on.
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Hi at all,
we have a strange behavior with the zoom factor of the Image Display Control in an Labview executable.
Ususally by clicking into the image with the zoom tool activated, the zoom factor changes from 1,2,4,8,16, ... ("x2")
Now we have one PC, where it changes from 1,2,3,4,5,... ("+1")
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In the software the operator has to search for fiducials on PCBs what means he has to click several times into the image.
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Hello Stefan,
thank you for posting at the National Instruments forum. The "Zoom Behaviour" was changed due to customer requests. I totally agree with you, that it is not the best solution to click 24-times to get the desired region of interest.
I created a small example for LabVIEW 2010, which uses a property node and event structure, to perform the zoom programmatically.
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Attachments:
Calculate Zoomfactor.vi ‏21 KB
Image Example.vi ‏63 KB

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Hope to get answers back soon,
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Attachments:
screenshot.docx ‏48 KB
Pattern Matching Example.vi ‏100 KB

Hi there!
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Attachments:
TestChangePaletteMain.llb ‏114 KB

Is it possible to explain a bit more about why your are of this opinion? With a strict TypeDef I'd agree, but it's a non-strict one here. Therefore I'm not aware of a reason why this should be intended.

Imaq Display Control, zoom to fit disappeared at runtime.

Like in the title. The right-click menu is impossible to call at runtime in the Imaq Display control. This has happened after compiling the code.
Some idea why it is happen this?
Francesco.
Solved!
Go to Solution.

Thank you very much, this is exactly what i search for!
b.ploetzeneder ha scritto:
I have had this problem before.
The solution is not very pretty, but it can be found here: http://forums.ni.com/t5/LabVIEW/Missing-quot-Zoom-to-fit-quot-in-application-EXE-build/td-p/905681
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Because the IMAQ-Vision function to display an image was slow for large images I wrote my own routine using the Windows SDK and it was much faster.
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Sir,
Naturally, the IMAQ Vision display function does use multi-threading. Whether it uses the second CPU for this thread is operating system dependant.

How to use an Event Structure responding to an image control that belongs to a parent VI.

Hi
I am loading a subpanel vi by pressing a button located in the user interface of the main vi which also contains an image display. Subpanel vi opens up on the side and doesn't hide the image display of the main vi. Subpanel vi contains an event structure that needs to respond to user clicking on the image display of main vi.
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Post a screenshot of your subVI code where you register the events.
André
Regards,
André
Using whatever version of LV the customer requires. (LV5.1-LV2012) (www.carya.nl)

How to programmatically control the Image display size

I wonder if
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If you are using LV 7.1, there is a property node that let you define the size of the image display.
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
Image size.vi ‏64 KB

LabVIEW 8.2 Image Display bug

Hi all,
Description : Trying to create a constant by right
clicking on an image display (controls palette > vision > image
display) causes labview to crash.
LV
version : 8.20 only, didn’t exist in 8.0.1 and earlier !
Same bugg happens:
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local variable of these indicators,
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Message Edité par TiTou le 10-23-2006 08:38 AM
When my feet touch the ground each morning the devil thinks "bloody hell... He's up again!"
Attachments:
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Hi,
looking at the JavaDocs it seems that the behavior is a client side behavior and not available as a Java API. This said it seems that you cannot programmatically invoke it
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I am using a ROI on an image in the image display control. When zooming into the image to fine-adjust the positioning of the ROI, the image scrolling does not work properly. As far as I understand, the image should scroll automatically when the ROI is leaving the visible area. However, the scrolling behaviour seems to depend on the origin of the Labview panel, not the origin of the image display control, which might require to move the ROI way out of the visible area before the scrolling takes place. In other words: the coordinate system of the image display control is shifted with respect to the true visible image area, depending on where you place it on the front panel. As a consequence, when clicking on a ROI which is in the visible area, but is outside of what Labview thinks is the visible area, it might immediately jump to the left border of the image, making the positioning of the ROI really difficult.
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If you make a ROI and try to move it down, you will notice that scrolling starts if you move the mouse out to about 10cms below the image (depens on your screen, of course). After that, if you click on the ROI, the scroll bars and ROI might jump up to the upper end of the image. Imagine how annoying this is if you try to finely adjust the ROI position.
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Thanks,
Dirk
Attachments:
scrolling.vi ‏818 KB

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Can a Vision image display's "zoom to fit" action be seen by an event structure?

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