Camera Trigger

Hello all,
I am currently working on label inspection using vision.
Is it Necessary to open and close camera for each loop ? I want to configure the camera in trigger mode once, and start getting snap in every trigger.Can any one please modify the below attached vi.
For clear understanding Please check it out the attached vi.
Waiting for reply
Thanks in advance,
Sasi.
Certified LabVIEW Associate Developer
If you can DREAM it, You can DO it - Walt Disney
Solved!
Go to Solution.
Attachments:
Trigger.vi ‏48 KB
Trigger.ctl ‏4 KB

Duplicate Post.

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Remote Camera Trigger

I spoke with some Adobe LR staff in Las Vegas at Photoshop World, and inquired about a remote camera trigger for LR. I posted frequently during the LR Beta for this very option.
Phase One makes C1-Pro, the digital download and viewing software mandated by every art director I know. Lightroom is an exceptional package and years ahead of C1-Pro. But Light Room cannot trigger a tethered digital camera release. I have been told by Adobe staff that one of the problems is the huge number of release profiles that would be necessary, BUT LR 2 already has the majority of these camera profiles in the setup.
If Adobe could add this function, I believe that C1-Pro would have to fold its tent.

> BUT LR 2 already has the majority of these camera profiles in the setup.
You are confusing the "Camera Color Profile" with the hardware communications protocol which will vary based on the OS and the camera maker. I should be noted that Camera Raw/Lightroom supports over 180 cameras with the raw files and color profiles. If you compare and contrast that with the numbers of cameras and manufactures that Phase One supports, you'll see that Capture 1 supports a small subset of total cameras out there.
As it relates to camera communications and control of the camera through Lightroom, that's a very different proposition than merely supporting the raw files. Each OS has different protocols and each camera maker does as well. To expect Lightroom to be able to control all of the functions of the camera (and if not all functions, what subset of functions would be a minimal subset?) becomes are very substantial engineering effort.
As it stands now, Lightroom already can work with the camera makers control software and auto-import from wherever the camera maker's software writes the file. This process relies upon the camera makers' control software and reduces Lightroom's area of responsibilities...you would have to make a far stronger use case that Lightroom should duplicate the work the camera makers' software is already doing. Otherwise, the use case that "it would be nice" isn't a strong enough argument.
Phase One's Capture 1 started life off as a camera control software for the Phase One camera backs...so they are already a camera controller. However, using their software to control non-Phase backs or cameras is very limited. As far as I know, you only get the ability to "click the shutter" which for me is not nearly enough. Using Canon's utility for example, I can set F stop, shutter speed, ISO and click the shutter. Merely clicking the shutter from within Lightroom would be a big step down in functionality if that's all Lightroom could do.
>If Adobe could add this function, I believe that C1-Pro would have to fold its tent.
Having Phase One fold it's "tent" is not really a goal of Lightroom. Phase One sells really great camera backs and regardless of what Lightroom may or may not do, Phase one's business will probably continue as long as people are buying Phase One backs. It's really not Adobe's nor Lightroom's goal to drive Phase One out of the biz...

Chart display and camera trigger

Hello,
I’m new to Labview and using it for my thesis to acquire data and initiate the image capturing of a camera. But I came across some problems with the data display and camera trigger, if anyone could offer some advice
My Hardware consists of a MC-USB-2404-UI DAQ-device (including MCCdaq-Drivers with Ulx-Libary and an extra LV vi pallet), a thermocouple type K and a TEMATEC pressure sensor MAP350-S / F (0-10V/0(4)-20mA). Since the DAQ-device supplies itself through USB with just 5V Power, I connected the pressure sensor in series with an additional 10V power supply unit.
The VI that I am constructing should read the measured values (pressure and temperature) and display them in a chart and on a numerical indicator. Above 200°C and 200bar the data logging should be manually started and a high-speed camera simultaneously triggered. Apart from the camera trigger, the VI is almost complete except for a few problems with measuring the value display.
Here are my problems:
1) How can I initiate the camera simultaneously with the data logging? Since the hs camera will capture more than 1000fps, I would restrict the image acquisition to a simple trigger that initiates the capturing. The appropriate VI’s IMAQ and IMAQdmx are already available. Should I create a new loop and connect it to my case-structure through a Rendezvous? And what kind of vi’s do I need for a simple trigger?
2) Also I couldn’t figure out how to convert 1D-Array of Waveform to DBL or at least how to connect the data wire with a numerical indicator. The indicator is crucial for the manual start of the data logging.
3) Another problem is with the chart display. As soon as I start the data logging, the graph disappears and the chart displays only n-samples of the currant loop pass. The enlargement of the chart length history brings no improvement. Before the data logging is started the charts are showing the all points from the start. So what changes when I Press “Aufnahme starten” (start acquisition)?
Any ideas would be much appreciated.
Attachments:
Blockdiagramm.png ‏153 KB
Frontpenal.png ‏172 KB
Temp+Druck_daqmx.vi ‏595 KB

Hello annaei,
thanks for your quik help... the numeric indicator is now implemented. thanks to you.
Explaination:
1) I have construkted an experimental vessel, which builds up pressure through a stamp. There is a heating jacket around it and on the bottom is a sight glass to capture the intirior with a highspeed camera. The starting conditions for the experiment are 200bar and 200°C. So I will need to monitor the current state of the intirior to know when i can start the actual data logging. With the data logging i want to start my image acquisition silmutaneasly.
3) For the Chart problem i attachted two pictures... After experimenting with the sample clock, reading vi and timing of the loop, i figured out that the greatest influence is the loop timing.
At 250ms (wait Xms multiple for loop pass) there is all data displayed even if i press the data logging button. At 100ms i was logging the data from 5s on and as one can see in the picture below the graph disappears after 28s. At 20ms loop pass interval the graph disappears randomly and with the data logging activated it is just a single point displayed.
In general the 250ms loop pass interval is a totally suitable solution for me, but i just can't help the feeling that the problem is not resolved. And i would like to know what i am doing wrong or what i could do better.
Thanks, Tobi.
Attachments:
mit 250ms multiple loop pass.png ‏171 KB
with 100ms multiple loop pass.png ‏160 KB
Temp+Druck_daqmx.vi ‏600 KB

N96 doesnt play camera trigger sound

My N96 recently stopped playing any of the 4 preinstalled camera trigger sounds...
No matter which of the 4 I choose and no matter which profile is currently active, the camera wont play any "click" sound.
Sometimes, this is absolutely ok, but sometimes its also annoying... is there a way to fix this, without resetting the phone?
Solved!
Go to Solution.

We can now blame you for all those illicit pictures taken on Nokia phones for the next month.
"Warning tones" would not be the logical category for the camera shutter sound but it may just be a bad translation from Finnish.

Imaqdx 1394 camera trigger retrigger

I am trying to use an ISG IEEE 1394 based camera (LW-WVGA-G-1394) using IMAQdx. I can capture images using the conventional "grab" etc routines provided in IMAQ, and I can capture an image per-trigger as expected. However, the camera documentation suggests that I can access a trigger mode "C" that triggers once and then free-runs. Although this is not explicitly and option in the camera attributes, it is supposed to be accessible by directly programming the registers, which I can do. Does anyone know if: a) this isn't possible using IMAQdx, even though nominally it might be on the camera; b) if it is possible, what on earth is it I am missing? No mention of these features is made in the IMAQ documentation or in MAX so I don't wonder if this is not possible through labview.
As a possible side observation, if I try this I usually see the first frame come in quickly and then the system wait as it waits for buffers to fill. Is it possible that this mode fills the same buffer repeatedly until the next trigger (in which case my monitoring of the buffer number will not pick it up).
thoughts anyone?
Thanks

Hi Gavin,
There shouldn't be an issue with this from the IMAQdx side, so my expectation is that the registers aren't set quite right. Just to confirm, you are programming the registers once, not programming the registers in a loop, correct?
I have been looking at the manual for the camera here
http://www.isgchips.com/pdf/LW-WVGA-G-1394_Global_Shutter_Camera_Users_Guide_3_29_2005.pdf
From looking at this document, it looks like you are probably working with both the TRIGM (page 19) and IBMODE (Page 24). Is that what you have been working with?
Thanks,
Sherrie R
Applications Engineer
National Instruments

How to connect external trigger PCI-1433

Hi all:
I met the same problem as this old post: https://forums.ni.com/t5/Machine-Vision/How-to-connect-external-trigger-PCIe-1433/m-p/1677560/highli...
however the post did not give solution.
I am having an issue getting the external trigger( from PCI 6259) to work with a cameralink camera, a PCIe-1433 card . The PCI 6259 is connected to BNC 2111, the output trigger signal from CTR0 is connected to the SMB connector on the 1433 card and is providing pulse train at TTL voltages (0-5V). Using the MAX SOFTWARE and under the Acquisition tab I have CC1 set to external 0, however the camera is not receiving this external trigger. The camera is Basler 4096-140km.
I measured the ouiput signal from CTL0, the sigal seems good.
I tried RTSI trigger before, failded. I thought SMB should be more straight forward, seems I was wrong.
Looking forward to reply!
Attachments:
camera configuration.jpg ‏168 KB
External Camera Trigger(SMB).vi ‏57 KB

Bobjojo,
You will actually need to affect the properties of both the camera and the frame grabber to take advantage of this triggering mode. I found a document that contains a good run down of the process to acquire in this mode (linked below). As far as the programming for the acquisition is concerned, the frames will be built at the driver level for the specified frame height. This means that the IMAQ driver will composite the line scans for you, and any simple acquisition (the document shows using the Vision Acquisition Express VI) will be able to pull the image into LabVIEW.
www.ni.com/white-paper/13786/en/pdf
Karl G.
Applications Engineer
ni.com/support

Blur video frame with NI PCI-1411 and JAI CV M-300 camera (urgent problem)

Hello,
I am new with Vision and I need some advice with a problem, which I encountered.
I have a computer with integrated NI PCI-1411 board, which is connected to a JAI CV M-300 camera. I am measuring a steel part which is positioned in a dark chamber. The part is put on a glass board and is illuminated from underneath with light.
The part is moving. I have to measure this part when it reaches the camera region. I have made a test with not-moving part and everything is perfect. Now, when I move the part I get blur frames from video (with these no part measurement is possible). I need specify, that the camera has no trigger, so it makes video all the time (this video is later inspecting with Vision Builder).
I have tried to change parameters in MAX, but no involvement. I have found no proper icd/file for the camera.
I also could use a SONY DXC-950P camera, if this is better.
How can I eliminate the blur from video frames? Or what am I doing wrong? Is the camera not good enough? Camera + trigger would get better images.
I have attached the video frame with moving object (static) and the blur video frame with moving object (dynamic).
Please give me a answer or ideas as soon as possible.
Thanks.
Attachments:
static.jpg ‏391 KB
dinamic.jpg ‏421 KB

You are using an interlaced camera. It takes half the picture (every other line), waits a split second, then takes the other half of the picture (the other lines). When it puts the two images together, you can see the two positions it was in when the images were taken.
The best solution is to use a non-interlaced or progressive scan camera, which takes the entire image at one time. The Sony might be this type of camera, since it has a P in its name. I didn't look up the specs.
If you can't get the right kind of camera, your only other option is to use fields instead of frames. One field is the half image taken at one time. The image will be half the height of the original image, though, which can mess things up.
Another possibility is the reduce the resolution of the image. If you take every other pixel in both directions, you will have a very clear image that is half the size of the original. You can do this with Extract in LabVIEW, not sure if it is available in VBAI.
Bruce
Bruce Ammons
Ammons Engineering

Triggering a camera using LabView

Hey,
I have a device that I'm moving using two servos. I'm controlling the motion using LabView. I want to capture the images of the device using MotionPro X3 high-speed camera (To track the position etc). So I need to synchronize the camera trigger and the motion using LabView. The software that comes with the camera (Motion Pro Studio) has the ability to allow the camera to be triggered using an external source. So I generated an analog signal using labview, and I connected a BNC cable from the analog output on the DAQ board to the camera. The camera needs at least 3V so it gets triggered, so I created a point-slider in labview, to increase the voltage from 0V to at least 3V. I got this part to work.
So now I'm trying to combine the camera control code with the motion control code. In the motion control VI, when I hit "Run" the device starts to move, but data (Position, forces etc) is only saved when I hit "Save Data". What I want to do is to trigger the camera when I hit "Save Data", and not when I run the program. Is there a way to increase the voltage from 0 to 3V when I hit the "Save Data" switch?
Thanks in advance. I appreciate it if you could help me as soon as possible. This is driving me crazy.

Hi FirasOSU
If possible, please post what kind of software you have available to work with and the specific hardware. The information I am posting is assuming you are working with one of our data acquisition boards which work with our NI-DAQmx driver.
There are several ways you can trigger the camera from a DAQ board depending on the model. I would recommend that you refer to the following knowledge base/white paper regarding tips and techniques for triggering with a data acquisition board and NI-DAQmx VIs
http://www.ni.com/white-paper/4329/en/
Here you will find information regarding options for triggering with our data acquisition boards using LabVIEW and sample code you can use to add triggering functionality to your code.
Also depending on your camera ports and if you have access to our vision tools that can be added to LabVIEW (Vision Development Module), then you can use the following example code to trigger your camera acquisition.
https://decibel.ni.com/content/docs/DOC-9112
Best of luck with your project!
Luis S
Application Engineer
National Instruments

Making a digital retriggerable gate pulse on demand

Hello,
I am relatively new to using DAQmx, and I was hoping someone here could provide me with a better solution than I have come up with.
The experiment we are running involves a camera, some image processing and then a laser that requires a gate to run. The way our program is currrently setup is that we loop over this process and after each image processing step decide whether or not to gate the laser with a certain number of pulses with a certain frequency and duty cycle. I have attached an example that would functionally do what I am describing. It is worth noting that our laser requires a digital low to gate and not a digital high.
Currently, our camera is triggered using an external trigger, so the while loop hangs on the IMAQ grab until it is triggered. Then we process the image, decide to shoot the laser (running on its 200kHz internal clock). The current example will hang the code until all of the Digital Output is done which may cause us to miss our next camera trigger. It feels like there must be a more intelligent way of doing this. I am even fine routing our own digital output on our DAQ to trigger a pulse train which is also generated by our DAQ, but ideally we would just send our gate pulses as soon as we know whether or not we want to fire our laser.
For extra reference, we are using a PCI2-1433 framegrabber as well as a PCIe-6363 Multifunction DAQ with a BNC 2110 breakout board. Any suggestions would be helpful. I get the feeling that there are a host of different ways that this could be done using this DAQ and the DAQmx software but like I said, I'm really new with these. I'm betting there are things the hardware can do that I have ZERO awareness of.
Thanks for everones time!
Cole
Attachments:
IMAQ_plus_DAQ_retriggerable_digital_gate.vi ‏30 KB
DAQ_example_retriggerable_gate.png ‏111 KB

Hi ColeVV,
I've taken a look at your code. I would recommend using a state machine architecture.
Do you need synchronization among your events?
Sincerely,
Bogdan Buricea
Applications Engineering
National Instruments
Bogdan Buricea
Applications Engineer
National Instruments

How do I count parts with a fiber optic sensor using the NI-1772 and VBAI 2011?

I'm inspecting parts using the NI-1772. Just after the camera, bad parts are ejected when they pass by a fiberoptic sensor. I want to use another sensor after that to verify the number of good parts, so that I can be sure the bad parts have been ejected?
I've tried using the READ/WRITE I/O step to read falling edges in sequence with a calculator step to increment the counts for each inspection iteration. I get a few counts at start up, and then the counts stop. It's as if the inspection has looped back to the Acquire Image step before or after the cap is present at the sensor.
Once this is figured out, I want to reset the count when a preset is reached.
Thanks,
Rob

Hi Brad,
It seems that the ISO Input is reading all of the falling and rising edges based on the LED, and that the Read/Write I/O step counts all of the falling edges when in configuration mode. I believe the signal stays low for about 10ms. (It might be important to clarify that I'm not using the camera trigger input for this. It is a subsequent sensor downstream of the camera.) I've attempted to attach a section of my inspection.
Thanks,
Rob
Attachments:
Section of RS38_3JAN13.vbai ‏96 KB

New Canon 5D MkIII

I have just downloaded RAW 6.7 and PS5 will now see and open my files.
BUT LR3 will not
Any suggestions or do I just have to wait and not use LR3 until a version for that arrives.
I am running these on an iMac (1 yr old) The computer also does not have a RAW update for this camera.
Regards
Des

Quote "Does Apple Aperture only come in one version, or are all version upgrades free, or does the very first version of Aperture support the 5D.3 perhaps because the support is built in to the OS instead of a particular product, or why is Apple’s upgrade and camera support policy preferable to Adobe’s?"
I have only used Mac's for about 2 years. I bought Aperture 3 so I presume at one point there was a 1 and 2. So far any updates have been free. Apple also alows you to put the same programme (for free) onto another machine registered to you once you have purchased it on one machine. If there are plans for Aperure 4 then I haven't read any on the rumour market.
I have had the updates for 5D3 from Apple for the OS and for Aperture separately.
I finally gave in and Purchased LR4
Today i loaded Canons EOS Utility for the camera. Then I did an expeiment. I connected Laptop and Camera using the USB. I fired off a load of shots both remotely and using the camera trigger and recorded all onto the hard drive using EOS Utility.
The I set Aperture to Tethered and shot and saved some frames.
Then I set up LR4 and set it to remote capture .......... and nothing happens. The Remote / Tethered bar comes up, says the Camera is present - hit the trigger and .... keeps saying BUSY and will not take a picture. LR3 would not remote take pictures either if tethered to to my 1DsMkII with USB, it would only work with Firewire.

IPhone 4 video recording

Wondering why whenever i transfer videos that ive recording on my iphone 4 back to iphoto the resolution is vertically oriented - as in I can't make by video fill the screen, its just a tall, thin, vertical column of video. I suspect it has to do with the resolution the video was recorded in (720x1280) and my monitor's resolution 1440 x 900. Yes? If you are using a macbook pro are there any options or workarounds for this?

ahh.. stupid me. leave it to apple to make the solution maddeningly simple. you want 16:9 video - record in landscape mode. duh!
Neither here nor there but i would LOVE a phyiscal button camera trigger. Loved it on Camera+ until they disabled it.

100% CPU with DAQmxRegisterSignalEvent(.., DAQmx_Val_CounterOutputEvent,..) / NIDaqmx 8.71 C client

Hi All,
Please see code below for my problem. I removed error checking to make things easily readable. Whenever I enable callbacks using DAQmx_Val_CounterOutputEven, the following code utilizes 100% CPU even with the 10Hz counter!!!! Am I missing something here? I tried all the options for interrupt based processing instead of busy polling to no avail. This is just unacceptable. These days one can't even deliver an app that is permanently running at 100% cpu without raising some eyebrows...
I must be missing something...
My application requires that I generate TTL level trigger pulses and at the rising edge of each trigger pulse, I also need to execute some very short C code. This code should start running within .5ms of the trigger edge. This should be no problem for a modern CPU. This is why I am using DAQmx_Val_CounterOutputEvent. However, I cannot have NIDaq implement this using busy polling (which I assume it's doing since it's eating 100% cpu). It is simply not acceptable to be running at 100% CPU for several reasons. The documentation and this support site talk about interrupt based processing, and the hardware is obviously capable of it.
So, the 2 questions I have are:
1. What do I have to do in order to have NIDaq use interrupt based processing instead of busy polling (for the DAQmx_Val_CounterOutputEvent callbacks in my application)?
2. In addition to (1), can I make it so that my callback only gets called on the rising edge of the trigger signal instead of both the rising and falling edges? Perhaps I can wire the counter output to a general purpose input and then generate interrupts based on the rising edge that the input measures?
Please help,
Philip
// currently the callback simply does nothing to make sure i'm not causing the 100% cpu problem
static int StaticTriggerCallback(TaskHandle taskHandle, int32 signalID, void *callbackData)
// we will get called once for every rising and once for every falling edge (20hz). We would prefer to be called only on the rising edge. Is that possible?
return 0;
void TTCameras:tartTimer(void)
// Configure DAQmx ct3 as our spin camera trigger. 10Hz
DAQmxCreateTask("", &taskHandle);
DAQmxCreateCOPulseChanFreq(taskHandle, "/Dev1/ctr3", "CameraSpinTrigger", DAQmx_Val_Hz, DAQmx_Val_Low, 0.0, 10.0, 0.5);
DAQmxCfgImplicitTiming(taskHandle, DAQmx_Val_ContSamps, 1000);
DAQmxSetReadWaitMode(taskHandle, DAQmx_Val_WaitForInterrupt);
// I tried this but it does not help:
//DAQmxSetRealTimeWaitForNextSampClkWaitMode(taskHandle, DAQmx_Val_WaitForInterrupt);
// If I register this callback, CPU usage goes to 100%. This callback needs to be done based on interrupts!
DAQmxRegisterSignalEvent(taskHandle, DAQmx_Val_CounterOutputEvent, 0, (DAQmxSignalEventCallbackPtr)StaticTriggerCallback, NULL);
DAQmxStartTask(taskHandle);

Duplicate post. Look here.
Regards,
Chris Delvizis
National Instruments

VBAI: Triggering Inspections

Just starting out with VBAI.
I am an experienced Cognex In-Sight user and am very impressed with many of the VBAI capabilities.
Dumb question: Inspections will be triggered by a ControlLogix PLC via EtherNet/IP messages.
Have I missed something, or do I need to build all the state transition logic for the ready/trigger/busy/done protocol, as well as heartbeats?
On Cognex it happens automatically. Putting in loops to poll the state of E/IP tags is not the most CPU-efficient approach, since the PC will also be running other software (HMI).
For a discrete camera trigger I understand that the acquire image tool can wait for a trigger edge transition, but we try to stay away from discrete signals to keep the cables to the cameras simple (PoE).
Thanks in advance!

Brad:
At the least, I think it would be a really good idea to have an Ethernet/IP template for ControlLogix PLCs as well as a template trigger protocol state diagram that customers can use as a starting point. I am sure that is something that you gurus could throw togethere in no time and would save customers untold development hours and eliminate unnecessary troubleshooting for your many new customers who are not yet VBAI veterans.
Cheers,
Nelson

Phottix Ares won't trigger my off camera 430 ex II when using iPhone EOS remote app!

I have a Canon 6D, a canon 430ex II and a set of Phottix Ares transmitter and receiver. I have set up my flash off camera and was planning to use the camera’s wifi capability to take a self portrait with my iPhone EOS remote app, but the flash wouldn't fire at all. When I turned off the app and phisically pressed the shutter it worked but never through the app. Then I thought of mounting the 430 directly onto the camera, used the remote app to shoot wirelessly and I was surprised that it worked!!! I coudn't find the logic behind this and I tried to find an answer everywhere with no hope!
Has anyone gone through tha same experience or have any explanation or solution to this problem? or any alternative solution to get the flash to trigger while shooting wirelessly? thanks.
[Mod note: Moved to "EOS" because issue seems to be with the EOS App. You'll get more exposure here!]
Solved!
Go to Solution.

If you are shooting using Live View (through the app) it won't fire the flashes like that. But if you just use the app to release the shutter and review the pics it will. It's been awhile since I've used the app, but there's a button or something to go between live view and standard shooting.
That said, I've read that some cameras can work around this by going into the menu and disabling silent shooting, and then Live View will work with simple triggers. I've never done it as I don't shoot in live view, but I've seen this discussed a lot. Not sure if the same can be said for the app, but it's worth a shot (no pun intended).
http://www.p4pictures.com/2011/02/live-view-mode-and-flash-on-your-eos-dslr/

Camera Trigger

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