Search found 12 matches

by frav
Mon May 07, 2018 2:55 pm
Forum: General Topics
Topic: CAM M7 availability after H7 release
Replies: 3
Views: 423

CAM M7 availability after H7 release

hello I just finished the design of a vision system for industrial application. The system is designed to work as an auxiliary system for the machine that we are producing and selling worldwide. Today I received the news of the next release of H7 version and I am quite concerned about the discontinu...
by frav
Tue May 01, 2018 2:59 pm
Forum: Project Discussion
Topic: Measure distance between two paper bands
Replies: 15
Views: 1610

Re: Measure distance between two paper bands

Ok. I'll send it tomorrow.
For the time being you can image that in white paper the cam is detecting a threshold due to some shadows and it result in a blob detection.
The core of the program I am using is practically the one you suggested a few posts above this.

Bye
by frav
Tue May 01, 2018 2:28 pm
Forum: Project Discussion
Topic: Measure distance between two paper bands
Replies: 15
Views: 1610

Re: Measure distance between two paper bands

Hello I made some steps ahead on the project. I decided to cover the machine width with several CAMs and I cannot predict if the the narrow gap between paper slits will be in front of a camera (maybe some of them will see only a white paper sheet). I experienced that in this case the CAM is detectin...
by frav
Sat Apr 21, 2018 12:01 pm
Forum: Technical Discussion
Topic: CV inspection bar
Replies: 3
Views: 629

Re: CV inspection bar

Thank you.
To connect the CAM to the CAN bus or do I need a transceiver?
I assume the board you suggested is required on PC side. Is it correct?
by frav
Fri Apr 20, 2018 9:16 am
Forum: Technical Discussion
Topic: CV inspection bar
Replies: 3
Views: 629

CV inspection bar

Hello I am designing a an inspection bar where I need to position up to 50 CAMs in order to cover certain length. All CAMs need to communicate with a PLC (or PC) to transmit some data acquired. Can you suggest the best solution to connect and address such amount of devices and how to power them (con...
by frav
Fri Apr 20, 2018 8:43 am
Forum: Kickstarter Topics
Topic: Future wishlist
Replies: 18
Views: 4863

Re: Future wishlist

Hello,

I would be very interesting to have an ethernet shield with PoE technology for industrial use.

bye
Francesco
by frav
Sat Mar 31, 2018 2:22 pm
Forum: Project Discussion
Topic: Measure distance between two paper bands
Replies: 15
Views: 1610

Re: Measure distance between two paper bands

Yes, same mistake is on the online documentation.

By the way, the line:
threshold = img.get_histogram().get_threshold()

still return the error " 'histogram' object has no attribute 'get_threshold' ".

The same if i try to write threshold in the wrong way.
by frav
Sat Mar 31, 2018 1:46 pm
Forum: Project Discussion
Topic: Measure distance between two paper bands
Replies: 15
Views: 1610

Re: Measure distance between two paper bands

Thank you for the code!

Actually my IDE shows on the bottom right corner "Firmware Version: 2.7.0 - [latest]"
The IDE version is 1.8.1.

I guess it already the newer one....
by frav
Sat Mar 31, 2018 10:14 am
Forum: Project Discussion
Topic: Measure distance between two paper bands
Replies: 15
Views: 1610

Re: Measure distance between two paper bands

Sorry to bother you...
I am trying but I got stuck on this error...
Error.JPG
Error.JPG (89.25 KiB) Viewed 1469 times
Any help would much appreciated!
by frav
Fri Mar 30, 2018 3:06 pm
Forum: Project Discussion
Topic: Measure distance between two paper bands
Replies: 15
Views: 1610

Re: Measure distance between two paper bands

Hi,
by re-reading your message I just realized that we had a misunderstanding: actually I need to measure the gap of a slit between two piece of paper.
Img.jpg
Img.jpg (5.88 KiB) Viewed 1586 times
I think the concept should be the same but, maybe, a littele more difficult to chose the right blob (I cannot pick the widther one...).
by frav
Fri Mar 30, 2018 12:29 pm
Forum: Project Discussion
Topic: Measure distance between two paper bands
Replies: 15
Views: 1610

Re: Measure distance between two paper bands

Thank you very much for your suggestion.
If you can provide some lines of code it would be very
well appreciated, so will have some base to start.

Bye
Francesco
by frav
Fri Mar 30, 2018 6:33 am
Forum: Project Discussion
Topic: Measure distance between two paper bands
Replies: 15
Views: 1610

Measure distance between two paper bands

Hello, I would like to use an OpenMV M7 to measure the gap between two paper bands while they run between two rolls on a production machine (I am attaching a picture took inside the machine). Francesco Paper bands.JPG Referring to the picture, I image that a camera each gap between two strips will b...

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