topic Re: detecting reactangle in labview ::shape detection vi ::no result in LabVIEW

detecting reactangle in labview ::shape detection vi ::no result

mangood — Thu, 18 Jul 2013 03:18:02 GMT

hi member

i try to detect reangle in binary image using shape detetion vi but no result i get
as you can see from figure below

i change many paramter <::max,min,
can any help please
best regards

Re: detecting reactangle in labview ::shape detection vi ::no result

MangeshD — Thu, 18 Jul 2013 05:49:46 GMT

Please provide the image that you are working on.

Also there are other options which are suitable for detecting rectangle like shape detection, Pattern Matching..etc..

Re: detecting reactangle in labview ::shape detection vi ::no result

mangood — Thu, 18 Jul 2013 13:11:22 GMT

dear this is the image
note the rectangle size is change so i think pattren maching will not work

Re: detecting reactangle in labview ::shape detection vi ::no result

WearWolf — Thu, 18 Jul 2013 20:55:32 GMT

Hello Mangood,

There are LabVIEW examples that are similar to this issue that can assist you in developing your application.

Goto: Help » Find Examples » Browse » Toolkits and Modules » Vision » Functions » Geometric Matching Example

This examples parameters can be tailored to rotation, scale, and occlusion.

Re: detecting reactangle in labview ::shape detection vi ::no result

mangood — Thu, 18 Jul 2013 22:15:44 GMT

ok it work

but how can i get ROI value so can i get the each mached object and analysis it and find its area in pixel???

Re: detecting reactangle in labview ::shape detection vi ::no result

WearWolf — Tue, 30 Jul 2013 13:56:04 GMT

Hello Mangood,

The output cluster of IMAQ Match Geometric Pattern 2 has the position of the origin of each of the pattern matches. You can then use the caliper function to measure the height and width of the rectangle and solve for the area.