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  1. New Toolkit : OpenCV wrapper for Raspberry Pi (LinuxRT) for LabVIEW Great ! learning platform student and maker for learning machine vision application with LabVIEW. It's working with LabVIEW Home 2014 edition and required LINX 3.0 toolkit. You can run NI-VISION toolkit with Raspberry Pi board too. 1.QwaveCameraCV is a LabVIEW Camera Driver library for Raspberry Pi 3B/3B+ (LinuxRT) https://github.com/QWaveSystems/QwaveCameraCV 2.QwaveOpenCV is OpenCV wrapper functions for LabVIEW for Raspberry Pi 3B/3B+ (LinuxRT) https://github.com/QWaveSystems/
  2. Hello, everyone! I want to synchronous acquire and save video files via a GIGE camera while not influence the frame rate. I achieve the program as below, but the frame rate is highly unstable. I hope you can offer some ideas, thanks!
  3. Hello, I need one help regarding changing the image image type How can I convert grey scale image to false color image? Here, I have attached two images. 1. greyscale image 2. is just an example that I want to convert. (False Color). Any help would be appreciate. Thanks, Parth Panchal
  4. Hello All, I am new to the camera labview programming. For my research work, I am using camera to grab the live image. I am stuck with one problem. how to treat the background? I tried to subtract the constant value from the entire image, but with that i am loosing few of my data. I know one solution, but I don't know how to implement this solution. Problem: how to take the values from the 4 corner of the image and subtract those value from entire image? If anybody previously develop similar stuff then please help me out for this.
  5. Hello All, Did any one previously used Imaging source camera (DMK series)? If yes, then please give me a reply. I need one help regarding Camera Attributes. Thanks,
  6. Hi to all. I would like to get the number of white pixels in an image (so get the white area). I see histogram.vi but I do not know how to do that. Any help? Thanks a lot!
  7. I would like to know if there is a parameter in line scan camera which allow me to control time trigger along NI MAX or labview with imaqdx. I mean, I would like to triggering camera during 100ms which specific shutter and specific line/sec. And if I change shutter or line/sec the time trigger keep being the same (100ms) I don't know if this is possible with some parameter of line scan camera. Thanks a lot.
  8. Hi to all, First of all thanks a lot for reading this post and being able to help. I am trying to use Imaq Compare Golden Template vi in a for loop. I am trying to do the next: 1- I have 3 templates and 1 image inspection. 2- The templates are in the image inspection. So image that the image inspection is an image with a big 1 2 3 numbers. So the templates are 1, then 2, and then 3. An for loop has 3 iterations. 3- In each iteration I pass a template, with IMAQ pattern matching vi template is found in an image (getting bounding box) and then d
  9. I have a LabVIEW based application for Vision inspection system. My application consist of acquisition from 6 cameras. My question is which solution is good 1. 6 Cameras connected to single PC1 or 2. 3 Cameras connected to PC1 and other 3 cameras connected to PC2 Brief explanation on your answer is appreciated
  10. Hi I have a camera set to observe an inside of a pipe. Because I know the angle of the camera and where is it situated inside the pipe, I can produce an array of points that correspond to specific pixels. Because the camera can move up and down and change the angle, I have to do it dynamically, so I can't load any calibration template because the calibration is changing on the spot. So I've managed to create the calibration points and pixel points, but after using them in Learn Perspective Calibration.vi image doesn't change. See .zip attached What am
  11. Hello to all. First of all thanks a lot for reading this post and being able to help. I have noticed the next problem: My application has a camera, this camera takes images (snap mode) and application process them (detect some edges in the image). It works fine. But when I make the Display bigger my application takes longer to process images (and for me that is crucial). I think that this happens because my application in this case has to process a bigger image (bigger display = bigger image??) So maybe if My camera takes images with lower resolution I solve the proble
  12. Hello to all. I am using NI MAX to get images from a camera (snao mode and hardware trigger). The camera is a basler 1300-30gm. The problem is the next: My camera snaps 4 images (1 image each 40ms). In pylon viewer (camera oficcial software) I can see the four images correctly. The problem is that when I am trying to see the 4 images in NI MAX sometime the camera can not take the 4th image... like there is no time to take the 4 image (or process it to visualize in NI MAX). So maybe there is a configuration parameter in NI MAX to solve this. Any ideas? Ho
  13. Hello to all. I have an image and a ROI. I would like to get the minimun distance between the first edge and the last edge in horizontal position. See image attached. If every edges found are in color yellow I would like to get the distance between edges in red (minimun distance from last edge to last edge in horizontal direction. I have tried to use "IMAQ Clamp Horizontal Min VI" but this VI does't the option "from first to last edge" and the only way to get what I want is to play with contrast but it is not work for some of my images. So is there any way to get what
  14. Hi to all. I would like to create an application where usar can train an OCR programmatically. So do the same that vission assistant when user trains OCR but in an application. So, take picture from a camera (I have already done this) then click button, select area to train and put the train (for example type "9" if the image is a number 9). And save it. And if for any reason PC is shutting down, application can remember the train. That is possible?' Thanks a lot!
  15. Hello to all. First I explain my environment and then I will ask the question. PC 1 (development PC): intel i5, windows10 64bits, 8GB Ram, Labview 2015 SP1 (32 bits), Vision Adquisition Software 2015, Module Vision 2015, DSC 2015, ni OPC Server. PC 2 (deployment PC) : intel celeron 1.99 GHz, windows 7 64bits 8GB Ram, Labview 2015 SP1 (32 bits), VIsion Adquisition Software 2015, Module Vision 2015, DSC 2015, ni OPC Server, Run Time Engine 2015, VIsion Run Time 2015. PC 3 (deployment PC) intel Atom CPU N2600 1.40GHz, windows 7 64bits, 4GB Ram, Labview 2015 SP1 (32 bits), VIsi
  16. I would like to try and upgrade my current CCD (pretty close to 640x480) to a higher res model (1080p). Here are my two requirements: It has to work LabVIEW/Vision software (could interface through GIG-E/IP or whatever) It has to fit inside of a tube about this size: (marker for scale) http://i.imgur.com/9i8nPRE.jpg The housing tube can be increased in size up to about a 1.25" diameter the tube runs back 2' until it opens up into an open space where we have a gigabit switch. The camera could just have a telescoping lens or be small enough to fit in a tube that size with the cables runnin
  17. Good day, I am trying to find a way to remove staff lines from music score for further processing. I am working on OMR (optical music recognition). I am not sure if it is possible with labview but there are some similiar projects using opencv and python. but my work is based on labview. So i was wondering of i can actually use anything to get it done. I know the steps for staves detection using C++. 1. line detection (using histogram profiling or hough transform) 2. filter the line from original image my problem is that 1. I can use hough transform to detect line but theor
  18. Hello, I am having a bit of an issue applying a threshold to an image and getting reliable results. I am thinking using edge detection prior to doing any other image processing could make this work... but I am at a loss for how to implement it. If you look at the image below you will see the root of my problem. The top set of images and bottom are only a second or 2 apart but the threshold sees them differently, yet the edge detection seems to correctly detect the edges the same. I only care about the range of pixels that usually makes up the brightest part of the im
  19. Hi , i am trying to find circle edge detection .. here i have to manully draw the ROI to decide which circle i need to find .. but in my case instead of drawing i need to enter ROI location manually .. is it possible ? i have added my code ProducerConsumerEvents 4 - Copy - Copy.vi
  20. I recently had a project dropped into my lap and have had a tough time finding information about it on the web. Here is a quick outline of my current issue. I am trying to take in an analog video signal (640x480) and process the stream in LabVIEW/IMAQ/IMAQdx (end goal would be to have uncompressed video being processed). I need to be able to have an uncompressed image to do calculations on. I am currently trying to achieve this by using an axis video server and converting the analog signal into a digital signal and finding the camera via an IP address (having networked video was requeste
  21. Does LabVIEW allow to define the parameters of the ROI descriptor during runtime? I need to make a calculation first and then define the descriptor.
  22. I need to take three pictures with different exposure values. I used vision acquisition for this. I tried using the finite acquisition but I could not find a way to set a different exposure value for different pictures. I used the single acquisition 3 times in a flat sequence with 2 seconds of gap. When I take a test picture with vision acquisition it looks fine but when I run it in the program, they are not at all the same. Sometimes two pictures are the same, sometimes it is just white and sometimes the higher exposure value is brighter than the lower one. Help please
  23. From a jpg image I need to extract pixel by pixel the R G and B values. Can someone help me with this? Also is it possible to extract exposure values from a jpeg image?
  24. Hi, I have a image control as input. I would like to know how to check if the image data is valid or not. I tried to search this on Google but I cannot find answer so if there is already answer, I am sorry but help me point to it. Thanks! Thang Nguyen
  25. I have some problem about vision builder AI 2011 please help me!!! Log: #OSName: Microsoft Windows XP Service Pack 3 #OSVers: 5.1 #OSBuild: 2600 #AppName: Vision Builder #Version: 10.0.1f3 32-bit #AppKind: AppLib #AppModDate: 07/30/2011 12:04 GMT #LabVIEW Base Address: 0x30000000 2012-2-18 20:41:31.630 c:\builds\penguin\labview\components\LVManager\trunk\10.0\source\LVListMenuImpl.cpp(683) : DWarn: bad itemId (0) $Id: //labview/components/LVManager/trunk/10.0/source/LVListMenuImpl.cpp#2 $ 0x3082FC29 - lvrt <unknown> + 0 0x300D4FF5 - lvrt <unknown> + 0 0x300D9553 - l
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