javaopencvbook/code

Code repository for Java OpenCV Book

code

Code repository for Packt Java OpenCV Book

https://www.packtpub.com/application-development/opencv-java-javacv

In order to setup the code, follow these instructions:

1- Setup Maven according to https://maven.apache.org/users/index.html . Make sure you check the links https://maven.apache.org/download.cgi https://maven.apache.org/install.html and https://maven.apache.org/guides/getting-started/maven-in-five-minutes.html .

Also, make sure you download the BINARY file and not the SOURCE one.

2- Go to https://github.com/JavaOpenCVBook/code and download it to some folder (click on Download zip on the right)

3- Extract the projects from the zip file

4- Customize the desired pom.xml from the chapter according to your platform. For instance, if you want to build for Windows x64, change the desired project pom.xml file from:

<dependency>
	<groupId>org.javaopencvbook</groupId>
	<artifactId>opencvjar</artifactId>
	<version>2.4.7</version>    	     
	</dependency>

<dependency>
	<groupId>org.javaopencvbook</groupId>
	<artifactId>opencvjar-runtime</artifactId>
	<version>2.4.7</version>
	<classifier>natives-windows-x86</classifier>
</dependency>

to

<dependency>
	<groupId>org.javaopencvbook</groupId>
	<artifactId>opencvjar</artifactId>
	<version>2.4.7</version>    	     
	</dependency>

<dependency>
	<groupId>org.javaopencvbook</groupId>
	<artifactId>opencvjar-runtime</artifactId>
	<version>2.4.7</version>
	<classifier>natives-windows-x86_64</classifier>
</dependency>

or maybe natives-mac-x86_64 for 64 bit osx.

5- Import your maven project in your favorite IDE.

5-a) In Netbeans, File -> Open Project -> Browse to the project folder. Click on the Open Project button. Now, right-click the project, and select Build with dependencies. It's time to tell where the native libraries are. Right-click the project -> Properties -> Run -> VM Options -> Point java.library.path VM option to native files using the following: -Djava.library.path="C:\Users\baggio\Documents\OpenCV Offline\code\chapter2\swing-imageshow\target\natives" . Of course, you should change -Djava.library.path="C:\Users\baggio\Documents\OpenCV Offline\code\chapter2\swing-imageshow\target\natives" to your native files folder. In case Netbeans give you hard time erasing the field everytime, just shut it down and open it again. Now, run the project: Right-click it, Run.

5-b) In Eclipse, generate a project file through:

mvn eclipse::eclipse

Then, import it as an existing project in Eclipse. Before running it, check your referenced libraries and look for opencvjar-3.0.0 or opencvjar-2.4.7 and right click it -> Properties -> Native library -> Workspace -> Point it to the native file location, e.g.: histogram/target/natives . Right click your project -> Run as -> Java application -> Point to the App class, press ok and it should run.

code's Issues

Test

testing notifications

Linux and Mac Natives

Hi, is there any platform natives -except Windows- that you put in your repository ? I tried natives-linux-x86_64 and natives-linux-x86 but couldn't reach.

New Version

Hello,

Is there any new maven dependency for the latest version of OpenCV?

Thanks

Errors

Hi,

I tried to execute the chapter1 code it didn't work. The repository you defined in the pom.xml doesn't exist anymore.

Did you find a better solution to have opencv via maven?

opencvjar-runtime v3.0.0 for MacOS does not exist

Hi
I tried to fetch opencvjar-runtime v3.0.0 for MacOS but it doesn't exist in github repo.

<dependency>
        <groupId>org.javaopencvbook</groupId>
        <artifactId>opencvjar-runtime</artifactId>
        <version>3.0.0</version>
        <classifier>natives-mac-x86_64</classifier>
    </dependency>

Issue with opencvjar-runtime

Morning

Working through your book and not able to get the first program to package via maven. Receiving the below error. Attached is the POM I am using. I am not able find a typo with what you have in the book. I also tried performing the mvn package command on the source code for the book, but getting the same error.

I am using Maven 3.5.4
Also tried Maven 3.3.9
Running from command line and from IntelliJ

Thoughts?

[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project my-opencv-app: Could not resolve dependencies for project com.widgetech.app:my-opencv-app:jar:1.0-SNAPSHOT: Failed to collect dependencies at org.javaopencvbook:opencvjar-runtime:jar:natives-windows-x86_64:3.0.0: Failed to read artifact descriptor for org.javaopencvbook:opencvjar-runtime:jar:natives-windows-x86_64:3.0.0: Could not transfer artifact org.javaopencvbook:opencvjar-runtime:pom:3.0.0 from/to widget-snapshots (http://localhost:8081/nexus/content/repositories/snapshots): Connect to localhost:8081 [localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1] failed: Connection refused: connect -> [Help 1]
[ERROR]
pom.txt

how about amd-x64 platform in windows?

Is there an existed version for amd-64 dll with maven install.
like:

org.javaopencvbook
opencvjar-runtime
3.0.0
natives-windows-x64

or
i could run x32 in x64 platform?

but i get an error :
Can't load IA 32-bit .dll on a AMD 64-bit platform.