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

[mangood]

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

[MangeshD]

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..

[mangood]

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

 

[WearWolf]

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.

[mangood]

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???

[WearWolf · Accepted solution]

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.