how can I get the rotating angle of a image?

[melo_xu]

Hello everyone,nowadays I meet a question that how can I get the rotating angle of my image. Please download the attachement " 02.png" before analyzing my problem.Thanks.

melo_xu

[muks]

You can try co-ordinate system for this. Hopefully it will work perfectly..

[muks]

Check the battery clamp example in example finder to know how to use co-ordinate systems

[muks]

Also you can use this template and try pattern matching

[melo_xu]

Sorry, I can't understand it very well. But I will Try it.Thank you !

[muks]

open your vision assistant and try playing around with pattern matching to get an idea. Post back if you are still stuck

[melo_xu]

Hello,Muks. I still can't  understand the method about coordinates . So I fail to get the rotataed angle of the image. When I use this method ,I  need an template  image. But how can I gain the template image?

melo_xu

[muks]

Did you try pattern matching? The pattern matching result will return the angle of match. Subtract 360 from this and wire it to "Imaq rotate"

[melo_xu]

The pattern matching need two images. One is the template image ,the other is the pictue which need rotate. But how can I get the template image?

[muks]

First my personal suggestion is always play around with vision assistant. The templates created using vision assistant can very well be used in labVIEW directly. In fact I almost always create image templates from vision assistant. Got to pattern matching. If your image is a RGB (color) then extract luminance plane using color plane extraction. When you click on pattern matching you will find two option 1. create template 2. Load template.

Click create template and select the region that you want to check as the template region.