triggered acquisition of images

Similar Questions

• What is the importance of buffers in the Acquisition of images

  I think the question is explicit. I select the function set up IMAQ1394. It includes a command to define the number of buffers, usually they implements buffer is more than a video acquisition and 1 in the acquisition of images (I quote examples). but when I change these examples by removing the wire of the buffer total still image is acquired very well. This prompted me to ask the importance or the importance of buffers in the acquisition of images.

  Hello Asad,

  If you look at the detail help, the buffer for a setting configures VI is defined as follows:

  Number of buffers For a first acquisition, this parameter specifies the number of images to acquire. For a continuous acquisition, this parameter specifies the number of buffers that the driver uses internally.

  By default it is on, so you will always be able to acquire without specifying this entry.  For a first purchase, you will acquire the number of frames specified.  The display of the images, if you have a poster of the last image.  For a continuous acquisition, the number of buffers is defining the size of the buffer by using your pliers is.  So, if you set a buffer of size 1 rather than say 10, you have more chance to run through the buffer overflows.

  I hope this helps.

• Service Acquisition of Image Windows (WIA) suspended at startup. Responding server {81ED811 A1F4E726-8CF1 - 11 d 1-BF92-00600} is not registered with DCOM within the required time.

  Since early April 2010, my computer started to shut down immediately after starting, or at a time later. A lot of system errors and other events have been reported in the error log, which much of this: "the MMTP service failed to start due to the error - the following system could not find the specified file - after 31/2 months, I abandoned this fixation and F11 to restart or reload the system to the original system; Have updated and 135 items updated, installed IE8, WinXP Pro + SP3 and finally my HP Laser Jet printer 5 p. Try to strt the computer a few hours later, but it stops immediately after, within 2-3 seconds; Repeat this several times. Unplugged the printer, the computer began; The error showd 2 journal items, repeated several times. i.e.

  (1) the service Acquisition of Image Windows (WIA) suspended at startup.                                                  (2) the server {81ED811 A1F4E726-8CF1 - 11 D 1-BF92-00600} is not registered with DCOM ala required timeout.  Can someone help please? I have to go into msconfig and other? I'm tired & patience thereby and the help that I received from the MS Tech Support.

  Help, please! Thank you! HeinrichDS

  Thanks "nass 1" for your support, I will follow Palouk recommendations to update the drivers for the HP product and hope it will be OK.

  I appreciate your help, HeinrichDS

  HeinrichDS

• Executives ignored in the acquisition of images with 4 Configuration of the camera (cards 2 x 1430), record only half of the expected data

  Hi all

  I have a VI that puts in place a continuous grab for four camera link cameras at 100 Hz (512 x 640).  I have the cameras running on an external clock of 100 Hz for synchronization (comes from box NI DAQ, trigger ports on 1430 cards are not connected to anything).  The VI sticks all the frames in a queue, and then I (slowly) he writes to disk after that I get what I want.

  The problem is, for a minute 4 capture, I get only about 14 000 items in the queue instead of 24 000.  Also, each image gets populated with a number of buffer, so I can see it is missing all the other images or something like that, sometimes it will jump 10 in a row, sometimes it will jump rare... any ideas?

  Here is a picture of my installation of collection (Scripture on the part of the disk is not displayed, but that pours out of the queue is fine)-

  

  Hello

  I see a number of problems with the approach in your VI that I'll try to cover...

  Your consumption with queues and images won't work as you wrote because the images are a type of reference data and so put them in the queues is not copy data values, only the references. So if you keep to the same reference to the image in a queue, they are all pointing to the same data of the image (which may be substituted).

  A better approach is to have two queues of images, representing the 'free' pads and then one that represents the images 'full' (your queue current consumer). You would then have your acquisition loop pull a 'free' image, fill it with data via a Get buffer call and then queue it for your use. Your consumer could pull this queue, do its thing and then queue the image to the queue 'free' for the producer to use again.

  In addition, your code does not currently use the lower level is VI buffer, so you take advantage of the buffering model input-output IMAQ uses internally. The simple Grab acquire VI returns only the most recent image, but if you fall at all it does not use the FIFO. You want to call make buffer with a buffer incremeenting number so that you do not skip the buffers and are allowed to get behind up to the number of buffers in the buffers configured list.

  Eric

• single triggered acquisition on scope timeout problems

  Hello everyone

  I'm doing a single acquisition triggered on the scope. I initialize my scope and configure the settings. I then

  Enter a loop to the whole of the trigger and then want to read a waveform of the acquisition. But he does not have a timeout.

  It simply reads the waveform right after that I put the threshold, even if she has not reached the threshold. In my view, that it does not wait for the trigger.

  Is there a way to fix this?

  I use a scope of the 2024B TDS and uses the drivers. I thought I could use the event allow visa and use the trigger as event type for the entry, and then

  Use the wait for SRQ and have a time-out of 25000ms but that didn't work. I get an error saying:

  Specified event type is not supported by the resource.

  I don't know what to do for the timeout. Y at - it other ideas that I could use or am I doing wrong?

  I have attached the vi. I am using LabView 2010.

  Thank you!

  Midna

  Look at the example in the library of Tek

• Acquisition of images with lasers of switching

  
  

  I solved the problem. I was using continuous in my code. Ideally, a life-long acquires and processes each image which is transferred from the camera. However, due to fluctuations in processing time, some images of the camera cannot be dealt with before the camera transmits the following image. If a delay is too long, the camera replaces the buffer requested by new data from the image. So I used acquisition one-shot and specified the number of internal buffers. The camera transfers each image until and including the specified number of buffers. The pilot acquires each image during a one-shot acquisition.

  My best regards,

  Patryk.

• Encoder triggered Acquisition (Single Channel N samples)

  Hello Internets,

  I am an inexperienced user of LabVIEW, I'm trying to set up a system in which blood samples are taken when triggered by a digital pulse.

  I'm sampling using a PCI-6250. I have an updated encoder in place that emits a digital pulse once per turn. I would possibly take about 1000 samples in a very short time triggered by this time by pulse rev.

  The problem I have right now is that I seem to get a lot less reading I expect otherwise, the LabVIEW program, I'm running also takes a long time to stop following my pressing the stop button.

  The table fills also in a way that is strange to me, perhaps someone could it explain?

  Thanks, any help would be greatly appreciated!

  Hi Relaxidermist,

  There are a few things in your current code that seems contrary to your goal:

  "I would possibly take about 1000 samples in a very short time triggered by this time by pulse rev."

  Assuming that you want to read 1000 samples for each received external trigger and you have several triggers coming, I would start by this example:

  Redeclenchables analog input finished using digital triggering

  I'll be the first to admit that he is not the most intuitive - on the M-series (like your 6250), use a meter to output to an acquisition really triggered.  You could rearm task in the software, but this takes time and is prone to triggering signals are missing.

  If you were on a series of X (63xx devices), the code you have is close, but you must make the following changes:

  (1) use the clock embedded to your example of clock instead of the external signal for PPR source.

  (2) make the task finished instead of continuous.

  (3) enable the redeclenchables property - it is not available on your device of the M series (where workaround posted above).

  Best regards

• Acquisition of images using PCI-1426 and Camera Link Camera

  Hello

  I am writing a program to capture images of a Camera Link camera via the PCI 1426 acquisition card in LabVIEW. The problem that I am facing is that I am unable to find the correct controls in the functions palette to start the image capture. Could someone tell me please how much control I'm supposed to use?

  I've worked on similar request sometimes back, I used IEEE 1394 camera, so once I found the correct block diagram controls I should be able to go from there.

  Thanks in advance,

  Sandeep

  Hello Kristen,

  Thanks for the suggestion. I was able to solve this problem. I think that was what was causing the problem I have LabVIEW 8.6 installed on my system and he had the Vision Acquisition System (VAS) 8.5.1. But, once I installed VAS 8.6 I saw the IMAQ in the functions palette.

  I'm guessing that LabVIEW 8.6 does not recognize the toolboxes of previous versions.

  Sandeep

• Cannot find any Acquisition of Image Windows service in services.msc. Cannot scan. Help please

  Hello. I just bought my deskjet 1050 all-in-one. Everything works fine but the scanner does not work. What seems to me, is that the question is in the HP scan. When I try to open it, it does not open. I then searched Windows Image Acquisition in services.msc, but there was none of this services listed there, I think that this is the cause of this problem. How can I solve this problem? How can I reinstall WIA?  I have win 7 Home premium 64-bit. Have installed the full version of the software updated, but of no use.

  Thanks be to God. I found the solution. I restored the registry entry in the registry editor. It is somewhat like "stiscv" in the registry.

• A search field triggered by an image.

  I do a search box for my business website and succeeded most of the time. I could do it from the code I got from JavaScript.com. What he gave me is used to 'submit' and 'reset' buttons which are very good. The search works well. However, I would like to have the seach triggered by a picture of a magnifying glass, I inserted to the right of the field research. Here is the code:

  < table width = "90%" height = "65" border = "0" align = "right" >
  < b >
  < td width = "100" align = "left" valign = "bottom" > < div align = "left" > < / div > < table >
  < td width = "224" rowspan = "2" align = "left" valign = "top" > < table width = "100%" border = "0" cellspacing = "0" cellpadding = "0" >
  < b >
  < script type = "text/javascript" >

  / / Google Search Site in-house script-By ballhype.com (http://www.javascriptkit.com)
  / / For this and over 400 + free scripts, visit JavaScript Kit - http://www.javascriptkit.com/
  This notice must stay intact for use

  Specify the name of the domain of the site to search.
  var domainroot = "www.argraph.com."

  function Gsitesearch (curobj) {}
  "curObj.q.Value =" site: "+ domainroot +" "+ curobj.qfront.value".
  }

  < /script >
  " < form action =" http://www.Google.com/search "method ="get"onsubmit =" Gsitesearch (this) "> "
  < p align = "left" > < span class = "style77Blue" > < / span > < span class = "style77" > Search our Site for your product < br / >
  </span >
  < input name = "q" type = "hidden" / >
  < input name = "qfront" type = "text" style = "" width: 180px "/ >"
  "" < img src = "... /images/Search-iconSm.png" alt = "Search" width = "30" height = "30" align = "absmiddle" / > < br / >
  
  < input type = "submit" value = "Search" / >
  < input name = "reset" type = "reset" value = "Reset" / >
  < /p >
  < / make >
  < /tr >
  < / table > < table >
  < /tr >
  < tr align = "left" valign = "bottom" >
  < td valign = "top" > < div align = "left" > < / div > < table >
  < /tr >
  < /table >

  The image I want to 'touch' the research of is called "Search - iconSm.png. I know that this is possible, but I have problems reverese engineering of code from sites on what I find.

  Can anyone provide some assistance? Thanks, as always, in advance for your help continues.

  ~ Gwynnplaine ~.

  Use an Image button "submit"

  Nancy O.

• acquisition of images to remote USB vision cRIO 9067

  I have a 9067 linked to a camera USB from Basler.  I am able to correctly display images via MAX and the example of Grab until I run the Grab sample on the target of RT.  However, I need not to images processed on the RT or FPGA in this application.  Is it possible to open a connection to distance from the camera to my computer using IMAQdx host?

  I was hoping I could use something like "[cRIO IP address]: cam0 ' in-camera address, but that doesn't seem to work.

  Is this possible or do I pipeline manually the images of the RT target?

  Thank you

  Omar

  Hello Omar.

  You can access the camera image directly addressing it through the cRIO. You will need to implement the transfer of images between the host PC and the cRIO. Fortunately, you can do this quite easily by using a variable flow or shared network image.

• acquisition of image by pressing a key

  Hi, I have to do a vi with the following requirements:

  I have to start a camera when you press the CTRL key, the camera should capture and display the image and when I release the key CTRL must show the last image. If I suppress restart CTRL key to catch and so on...

  any idea?

  Thank you

  easy
  use Imaq assistance inside the structure dealing with how long low release
  Go to the bottem property and use focus to Ctrl key
  This code must be inside the while loop for continuous

• help the acquisition of images only when the light is on

  Hi, I need help to create an instrument.

  I need to create an instrument to:

  I have a black box with a camera. This camera will be connected to the pc via the USB port. When I press a pedal strong light comes througt it.

  I need that labview shows an image in real time when the light comes and stops showing the image when the light goes out, showing the last structure that was light. It's like a system called last taken image.

  for example:

  I have a pedal that start a strong brightness. LV doesn't show any picture, when I press the pedal and lights in LV stars to show the image when I stop pressing the button LV displays the last picture or image that was light. If he starts another moment to press the pedal LV begin to appear the new images until I stop to press the pedal.

  any idea?

  Thank you

  Jorge

  that is going to be there to help you use

• Keep all information collection during the acquisition of images when you use the basic IMAQ package

  I did show a command of X from IMAQ image control that has the ability to overlay dots and lines on an image, but when I put my control of X in my loop of acquiring image collections information disappears with each new picture that I acquire.

  How can I keep the overlay in place and just update the control with the new image and does not overwrite data overlay? I tried the function of superimposition of fusion, but this doesn't seem to work.

  Thank you.

  Overlays are completely erased when you acquire a new image.  You can create collections on a separate image, and then copy to each new image overlays until you view it.  The other option is to re-create overlays for each new image.

  Bruce

• Acquisition of images with 3 USB cameras causing too many uses of the memory/cpu

  Dear experts,

  I'm trying to capture images with 3 cameras USB, located in 3 different positions. I have to initialize each cameras using USB list vi camera when switching between cameras. I realize that, by making this method causing too many uses of the memory/cpu and can cause CPU hang up. If I stop the program, the memory/cpu counter are down.

  Do you know how to reduce this problem.

  Thank you

  Hart