Machine Vision topics

conversion of OCR string into text file

Er.DKD — Wed, 22 May 2013 04:49:09 GMT

Hello everyone

I have tried to convert the string from an OCR to a text file. but it is showing no results please check it out and help me

I have attached the vi

pattern match with shift invariant AND rotation invariant

zou — Tue, 21 May 2013 21:54:31 GMT

Is it possible to do a pattern match with shift invariant AND rotation invariant?

IMAQ Find Pattern 3 takes only shift OR rotaion invariant.

VBAI 3.6 with XPe???

Median9 — Tue, 21 May 2013 18:32:45 GMT

Is it possible to run VBAI 3.6 on Windows XP Embedded?

rgb image to grayscale in vision builder

ozenc.ugur — Tue, 21 May 2013 14:02:47 GMT

Hi,

I am Using Vision Builder and I want to learn how can I convert my rgb images to grayscale images?

Could you please help me?

Best regards,

imaq image control (Delete default Value)

Cardinal1664 — Tue, 21 May 2013 13:55:46 GMT

I have a problem with the vision imaq image control.

I have defined for a "imaq image control" a default image for the development.

Now the default image is no longer need and i want to remove the default value an reset the Control to an empty image.

How can i reset the default Value from the "imaq image control" to an empty image?

Image Display got rotten (really: the Indicator, not the Image!)

Enrico_Segre — Tue, 21 May 2013 12:00:25 GMT

I'd like to hear comments on the following VI, containing just a single Image Display Indicator, which, for some reason got corrupted during porting across LV versions and resizing. By divide and conquer I found that it was the origin of pretty odd problems that I was observing in a complex VI: absence of front panel updates, pull down menues not displayed, actions needing a double press of buttons, and so on.

The VI is saved from LV2012 windows, also attached as saved for 8.5. Just opening it, on 2 installation of Labview, I turn labview into something responding oddily. (try to pull down a menu, e.g.). Linux LV seems not to suffer from it, maybe because it places a nonfunctional FP placeholder for this control, without trying to cope with its nonfunctionality.

The question is perhaps, why LV doesn't detect the problem and behaves so weirdly with it -- bug?

Enrico

image to speech

Er.DKD — Tue, 21 May 2013 11:12:31 GMT

Hello everyone I have successfully made OCR system and text to speech

can anyone guide me what else i can do in OCR and text to speech so as to make my project really effective and different from others...Is there any new technology in OCR or speech which can make my project more effective????

please suggest me something....

VBAI 2011: can't call VI

HoaHuynh — Mon, 20 May 2013 18:47:49 GMT

Hello,

I am working on the application that inspect our joysticks. This joystick has LEDs on it, and it need an VI to turn on/off each LED at the time; I have a camera and VBAI to run inspection each of my LED.

The VI is quite complicated, but it ran successful themselves by LABVIEW. However, when I integrate the VI to VBAI, there is a weird error pop up, and I have no clue why it happens.

I attach two of screen shot of the error. Hope you can guide me through this issue.

Detect barcode automatically

windows — Sun, 19 May 2013 18:52:02 GMT

Hello All,

Started a new project for my company.

1. I have a code 39 type barcode which i had generated using labview. (done with the help of forums)

2. I have to print this image to the printer. (not done)

3. Using Camera(usb) I want to scan the barcode-Here I want the labview to automatically detect the ROI of the barcode and display the code in the string indicator.

Please help me complete this project.

Here i attach the first part of this project.

From string to Jpeg

Carmine_ — Fri, 17 May 2013 18:22:25 GMT

Hello to all.
I'm trying to capture an image from a camera connected to the PC with arduino.
I can get a string with the code of labview image jpeg (from FFD8 to FFD9) but I can't view it in any way.
I have tried all.

https://decibel.ni.com/content/docs/DOC-13513 (but when run the program labview crash)

http://forums.ni.com/t5/Machine-Vision/Convert-JPEG-image-in-memory-to-Imaq-Image/td-p/851074 (the program not displays the image)

but can view the image.
I hope you can help me.
thanks.

I use Labview 2010 with NI-IMAQ.

cam problem

ayman22 — Mon, 13 May 2013 19:17:33 GMT

when i use vision builder and aquire acam after converting the program to labview if i make any changes "using arduiino for example" it gives me error9999 &the cam doesn't work any help please

algorithm behind OCR

Er.DKD — Mon, 13 May 2013 13:11:11 GMT

Hello everyone

I am doing my project i OCR to recognise characters from images or handwritten documents.but I dont know which algorithm OCR session is using to train characters????

I am unable to give answers to my teachers about OCR...

Please help

GigE Vision All-In packet

linru — Mon, 13 May 2013 13:25:55 GMT

Hello,

I am searching for a solution for a simple problem. I designed linescan camera, GVCP works, camera streams UDP packets on request from NI Max, but these packets are not recognized as data and Timeout Error 0xBFF6901B comes. Attached I send my All-In UDP packet. The same happens on my laptop and NI Industrial Controller with Intel network interface. Firewall is always off. On which parameters NI Max decides, that current packet is data packet? UDP Port?

I set the value to 1 in my camera's XML file and my camera should support All-In transfers. Should I have set it elsewhere too?

What else should I check?

Regards,

Linus

USB/DirectShow camera not showing in NI-MAX

tstalcup — Mon, 13 May 2013 03:16:23 GMT

I've got a Point Grey Chameleon CMLN-13S2M USB 2.0 camera and it is not showing up in NI-MAX.

I'm well aware of the Directshow registration problems with the PGR cameras, and as far as I can tell the camera is properly registered. It shows up with no problems in AMCAP, a simple Directshow viewer, and also in Skype.

I just uninstalled the PGR drivers and spent a while going through the registry to delete all references I could to Point Grey and PGR. I then reinstalled the 32 bit version of the latest drivers, v2.5 beta 2. I also upgraded the camera firmware to the latest.

I'm running

Labview 2012 SP1 f2, 12.0.1

Vision development module 12.1.0

MAX 5.4.0f0

NI-IMAQ 4.7.2

NI-IMAQdx 4.1.0

Any ideas? This is a side project and I've been working on it off and on now for more than a year and I've got to get this camera working.

date/lote verification

Er.DKD — Sat, 11 May 2013 17:10:18 GMT

Hello everyone

can some one suggest me that can I use OCV for date/lot code verification (either printed on a label or directly marked on the package or product) for pharmaceutical, medical device, cosmetics and other consumer goods packaging

I mean is this somewhat related to OCR ????

Please give me some idea regarding this...

Thanks in advance

Basler Lost Packets Can't Resolve

biographie — Fri, 10 May 2013 20:07:26 GMT

I have been trying to get a Basler camera working with Labview and MAX again. I say again, because it use to work. Not quite sure what happen other than upgraded to 2012 SP1 and the new Basler driver 3.2. I went thru and followed Basler's instruction for driver install and network card settings. Please check out the screenshot. The weird thing for me is that it will have a steady image for three or four seconds, and then it starts losing packts and never recovers. Why would it be able to keep up for a few seconds and then the problem? I would assume if the setup wasn't right, it would never have a full image. When I had this issue before, I was able to mess with the timing of the resend messages, and it solved the issue when running Labview 2011; but that doesn't seem to work now.

The screenshot is from MAX, but it acts the same in my Labview app. When I run the Basler pylon viewer, it doesn't drop have any issues. Any ideas? Thanks.

determine object pose

Klemen — Fri, 10 May 2013 06:31:52 GMT

Dear programmers,

I have been dealing with the issue of determining the pose of an object following the: http://zone.ni.com/reference/en-XX/help/372916M-01/nivisionconcepts/spatial_calibration_indepth/

I have calibrated my system and tried to determine the Rotational matrix and Translation vector following the documentation (please see the attachments below saved for LV2011).

I have also calibrated my system with Matlab calibration toolbox and the focal distances and optical centers are basically the same. But the calculated Rotational matrix and Translation vector are correct in Matlab, but incorrect in Labview.

Could someone with more experiences pleas helpe me to understand what am I doing wrong?

Best regards,

How to match a pattern of a different scale

LaurenceD — Thu, 09 May 2013 14:25:54 GMT

(Using LabView 2010)

I'm trying to match a pattern that is a different size in the two images and could use some advice.

The pallette I'm looking on is Vision and Motion -> Machine Vision -> Searching and Matching

It would seem (please correct me if I'm wrong) that the 'IMAQ Match pattern.vi' is unable to use scaling to match the template image to another image where the pattern is a different size, since it lacks the options.

I *think* it is possible with 'IMAQ match geometric pattern.vi', but after playing around with the example vi provided I simply can't get it to recognise the pattern if I change the size of either the template image or target image.

Can anyone who has got this to work for them tell me how they set it up?

Thanks

vision

Balajikeee — Wed, 08 May 2013 17:31:33 GMT

Hi, Can any one tell like, which camera will be useful for me, please find the requirement below,

Hole diameter measurement, Size 160 * 160 mm

Thickness 5mm,

The composite plate has more than 6 holes spreaded over it and we need to measure the hole daimeter. we are looking at 50 Micron accuracy..

VBAI - "Find Straight Edge"

splee — Wed, 08 May 2013 11:13:39 GMT

Anybody can explain what the settings "Kernel Size" and "Projection Width" means?

Why does it matter? What are the recommended values?