BoofCV: Unresolved Compilation Problems

Question

I'm using a Raspberry Pi (4) and hoped I'd be able to implement QR detection through a Rasp Cam. I found BoofCV that could do the job - so I copied the code from the ExampleDetectQrCode repo but its throwing a few errors...

var cannot be resolved to a type
VisualizeShapes cannot be resolved
VisualizeShapes cannot be resolved
ShowImages cannot be resolved

On my imports I'm also getting:

The import boofcv.gui cannot be resolved

I used Maven to implement BoofCV, I'm very new to Maven but I think I've done it right (again just copied straight from the repo home):

<dependency>
  <groupId>org.boofcv</groupId>
  <artifactId>boofcv-core</artifactId>
  <version>0.40.1</version>
</dependency>

Any help would be greatly appreciated, cheers

score 1 · Accepted Answer · answered Feb 03 '22 at 23:32

1

You need to import the "boofcv-swing" artifact to have the built in Swing components.

<dependency>
  <groupId>org.boofcv</groupId>
  <artifactId>boofcv-swing</artifactId>
  <version>0.40.1</version>
</dependency>

If your application doesn't have a GUI you will want to remove anything that's in the boofcv.gui package as that will try to open a window.

answered Feb 03 '22 at 23:32

lessthanoptimal

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Thanks, that worked to get rid of the GUI errors and I sorted the Var problem. However I'm now getting: `Caused by: java.lang.NoClassDefFoundError: boofcv/struct/image/ImageGray`. – johnl5124 Feb 04 '22 at 00:55
that's really weird since that class is defined in "boofcv-core". Does it build just fine but you get that error when you run it? – lessthanoptimal Feb 04 '22 at 04:28
Yeah I only get that error when I run it, build is fine – johnl5124 Feb 04 '22 at 10:27
1

you're missing a jar or two in the class path https://stackoverflow.com/questions/15930782/call-java-jar-myfile-jar-with-additional-classpath-option – lessthanoptimal Feb 05 '22 at 05:37
Yes you're right. Managed to get it sorted! Cheers – johnl5124 Feb 08 '22 at 22:20

BoofCV: Unresolved Compilation Problems

1 Answers1