eclipse 2018-09 maven can't find dependency but it exists everywhere - eclipse

Question

I'm using an older version of eclipse 2018-09 with 32-bit Java, not sure that makes a difference. (project limitation for using these older versions)
I have been using the default maven plugin with the project and it all has worked so far, except for the following one:
<!-- https://mvnrepository.com/artifact/com.github.kilianB/JImageHash -->
<dependency>
<groupId>com.github.kilianB</groupId>
<artifactId>JImageHash</artifactId>
<version>3.0.0</version>
</dependency>
https://mvnrepository.com/artifact/com.github.kilianB/JImageHash/3.0.0
I get:
Missing artifact com.github.kilianB:JImageHash:jar:3.0.0
I have done all the maven things, clean, install, etc...
This jar is located at "JCenter repository (https://jcenter.bintray.com/)".
And the url and files are all there.
https://bintray.com/kilianb/maven/JImageHash/3.0.0#files/com%2Fgithub%2FkilianB%2FJImageHash%2F3.0.0
I even downloaded the files and jars.
I have no settings.xml in my .m2, as I'm using the default eclipse maven. The pom.xml is the default one and I added the dependencies I have needed.
What's missing?
Thanks in advance.
FWIW here's my pom I'm using
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>patmangames</groupId>
<artifactId>carddetect</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<resources>
<resource>
<directory>resources</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/net.sourceforge.tess4j/tess4j -->
<dependency>
<groupId>net.sourceforge.tess4j</groupId>
<artifactId>tess4j</artifactId>
<version>4.5.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.jsoup/jsoup -->
<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.13.1</version>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>org.openpnp</groupId>
<artifactId>opencv</artifactId>
<version>4.3.0-1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.11.0</version>
</dependency>
<!-- FAILS TO FIND AND DOWNLOAD-->
<dependency>
<groupId>com.github.kilianB</groupId>
<artifactId>JImageHash</artifactId>
<version>3.0.0</version>
</dependency>
<!-- FAILS TO FIND AND DOWNLOAD-->
</dependencies>
</project>

Answer 1

Without a settings.xml you only get jars from MavenCentral.
Note that MavenCentral has nothing to do with mvnrepository. Finding a jar on mvnrepository does not mean that it is in MavenCentral.
Indeed, in your case, the jar is in jcenter, so you need to write a settings.xml where you add that repository as <repository>.