Integrating Usb Camera
in [LabView]
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From: roy@start-art.co.il on 13 Jul 2006 13:40 I am using a Usb Camera of a Vendor named IDS. The provide an ActiveX to control their camera. I use the ActiveX container control to load and init the camera. I am able to get a live display. In order to change the settings of the camera I use the invoke node (so far so good). In order to do image processing I need to transfer the data from the ActiveX container to a buffer which will be processed later. Can anyone offer a way to do this? can you direct me to the functions that will do the job? The ActiveX software Manual can be downloaded from <a href="http://www.start-art.co.il/uEye_activex_manual.pdf" target="_blank">http://www.start-art.co.il/uEye_activex_manual.pdf</a> One possible way to do this is to use the SaveImage function to be saved to a file and be read later on.( it seems to me not a good idea) I will be grateful getting any comments. Thx, Roy
From: Travis M. on 14 Jul 2006 14:40 Good afternoon Roy, Thank you for posting to the NI Discussion Forums ? unfortunately, I will not be able to open the manual and find the exact function to use, but if you tell me which function you wish to use to have the data returned, I would be more than happy to give you suggestions on how to structure your program to use that data. Sorry I can?t be more specific at this time ? let me know if you have any additional information you can provide us.
From: roy@start-art.co.il on 20 Jul 2006 08:10 Hello Travis, I was away for few days. The Method I am using activeX is GetImageMem() it returns a pointer to the head of the buffer with the image data in the memory of the PC. What function or functions do I have to use in order to provide this pointer, provide the buffer size and get an output "image out" like in all other functions of image acquisition? Thanx, Roy
From: Travis M. on 21 Jul 2006 15:40
Good afternoon Roy, I?d like to help, but the link above to the manual is broken. Also, generally we (NI Applications Engineers) don?t provide support on code/interfaces written by external companies. I?d be happy to help you with how to generally make the ActiveX calls, but generally the investigation in to which functions to use and how to use them are up to the users to implement, and the manufacturer to support. However, one great strategy to use is to look at all available examples you can find. Most of the ActiveX example programs you find will be written in other programming languages (such as C++, C# or VB), but converting these to LabVIEW calls is often much easier if you have something to work with. The calls in LabVIEW will follow the same sequence as the ones in the corresponding example, and the functions should populate with a list when using the invoke nodes much like ?auto complete? works in the text-based programming language platforms such as MSVC++, etc? Best of luck with your application, if you encounter problems on the way, I?ll do my best to help but we generally can?t provide too much help with the functionality of the external interface itself. Thanks again for posting, and have a great weekend! |