10-13-2005 07:45 PM
10-14-2005 05:52 PM
Hello,
You may want to take a look at some of the example programs that ship with Vision. They can be found in the example finder (Help » Find Examples...) under Vision » 2.Functions » Calibration. Another very useful tool is the Vision Assistant. Using property pages, you can manually set up and tweak your processing sequence. Then, when you are satisfied with the results, you can convert the VA script into a LabVIEW VI by selecting "Tools » Create LabVIEW VI"
Regards
Aaron B.
National Instruments
10-16-2005 07:10 PM
Hi,
Thanks for the post. Unfortunately I am in the evaluation phase of IMAQ and do not have access to Vision Assistant.
I did look at the examples and copied parts of the nonlinear calibration example to do the lens correction. The problem is that in the example the calibration just works, there is no setting of extra parameters, or even an indication as to whether such settings exist. I have experimented with different shaped ROI’s but to no avail, the results that I get are far inferior to those of the other software.
Does anyone know if there are additional settings for the lens calibration VI’s?
Thanks.
10-17-2005 12:51 PM
I have done a lot of work with correcting image distortion. If you are willing to spend a little money, I could put together some nice tools for calibrating your image and correcting other images. It would include an interactive grid calibration procedure where you can manually correct the grid positions. It wouldn't be quite as fast as the NI versions, but it would provide a lot more interaction and adjustment capabilities. I think the final result would be better than the 3rd party correction you posted.
If you are interested, contact me.
Thanks,
Bruce
10-17-2005 07:03 PM
I will consider your offer however what I really want is a complete solution for my entire application, of which this is only a small part, and any time I need to switch programs decreases the ability to automate the procedure. If it cannot be done as a single package then it is not likely to be worth getting the IMAQ toolkit.
Since it appears that the built-in functions in IMAQ are not adequate I will invest in a better camera/lens combination (one with less distortion) and just use other, more flexible, software that I already have access to.
10-18-2005 07:50 AM
10-18-2005 08:02 AM
And one more thing...
The only reason I have been watching this question was I wanted to hear what Bruce had to say!
And NO, I do not work for Bruce and technically speaking he is one of my competitors !
Ben
10-19-2005 10:53 AM
10-19-2005 11:02 AM
It is always nice to see support from the LV community!
Perhaps I forgot to mention that all my image correction tools are 100% LabVIEW. Technically, IMAQ isn't even required, but it can make the job a lot easier.
Bruce
10-19-2005 08:22 PM
I will see what sort of distortions I get from my new camera (provided I get my grant) and I will contact you if my solution is not sufficient.