We aggregate and tag open source projects. We have collections of more than one million projects. Check out the projects section.
Generate Thumbnail in Java using Thumbnailatorlibrary
In our work there will be situation where we need to resize the image, generate
thumbnails and so on. Users need to have little bit of image processing knowledge to achieve it. We have Java ImageIO APIs to achieve these functionalities. As said, we need to be aware of or spend time in learning these APIs. To help us, Thumbnailator library provides easy fluent style API and generates thumbnail in simple three lines of code.
Thumbnailator library is a wrapper to Java imageio API. It provides functionality to generate thumbnail, resize images. image conversion from one format to other.
Maven Dependency:
<dependency>
<groupId>net.coobird</groupId>
<artifactId>thumbnailator</artifactId>
<version>[0.4, 0.5)</version>
</dependency>
Below code helps to generate thumbnail. The output can be of same format or different.
Thumbnails.of(new File(INPUT_PATH, "test1.png"))
.size(250, 250)
.toFile(new File(OUTPUT_PATH, "output.png"));
Thumbnails.of(new File(INPUT_PATH, "test1.png"))
.size(250, 250)
.toFile(new File(OUTPUT_PATH, "output.jpg"));
If you want to rotate the image
Thumbnails.of(new File(INPUT_PATH, "test1.png"))
.size(250, 250)
.rotate(90)
.toFile(new File(INPUT_PATH, "output.png"));
To add watermark
Thumbnails.of(new File(INPUT_PATH, "test1.png"))
.size(250, 250)
.watermark(Positions.CENTER, ImageIO.read(new File(BASE_PATH, "watermark.png")), 0.5f)
.toFile(new File(OUTPUT_PATH, "output.png"));
if you bunch of files in a directory and you want to convert generate thumbnail for all of them
Thumbnails.fromFiles(Arrays.asList(new File(INPUT_PATH).listFiles()))
.size(250, 250)
.asFiles(new File(OUTPUT_PATH), Rename.PREFIX_DOT_THUMBNAIL);
Thumbnailator is simple image processing library where you can use to do thumbnail related task. It is not for heavy image processing but it can help you for smaller task.
Reference:
https://github.com/coobird/thumbnailator
http://www.findbestopensource.com/tagged/image-library
http://www.findbestopensource.com/tagged/image-processing
Subscribe to our newsletter.
We will send mail once in a week about latest updates on open source tools and technologies. subscribe our newsletterJson Web Token shortly called as JWT becomes defacto standard for authenticating REST API. In a traditional web application, once the user login credentials are validated, loggedin user object will be stored in session. Till user logs out, session will remain and user can work on the web application without any issues. Rest world is stateless, it is difficult to identify whether the user is already authenticated. One way is to use authenticate every API but that would be too expensive task as the client has to provide credentials in every API. Another approach is to use token.
Apache OpenNLP is a library for natural language processing using machine learning. In this article, we will explore document/text classification by training with sample data and then execute to get its results. We will use plain training model as one example and then training using Navie Bayes Algorithm.
Users login in to the Websites, Blogs, Forum and adding their content, comments, asking or answering the questions etc. If user has added his photo then it will get displayed besides his content but not everyone provides his photo image to the sites. Most of the sites used to display a common avatar image for those who have not provided their image. When we read the content, it may be odd to see the same image representation for all users. Identicon comes for the rescue.
I have been writing on the desktop image processing application. At the version 1.0, I use the octree color quantization algorithm to reduce image to 256 colors, which is highly memory efficient with each pixel assigned the color at the center of the octree bin in which it falls. On the other hand, generates the palette using the distribution of colors in the image, but it does not consider the frequency of color. This means that if an image is composed of similar colors overall but has many different low-frequency colors or noise, octree's results can be very poor.
The Apache OpenNLP library is a machine learning based toolkit for the processing of natural language text. OpenNLP also includes entropy and perceptron based machine learning. . It contains several components for natural language processing pipeline like sentence detector, tokenizer, name finder, document categorizer, part-of-speech tagger, chunker, parser, co-reference resolution.
Hazelcast is an open source In-Memory Data Grid (IMDG). It provides elastically scalable distributed In-Memory computing, widely recognized as the fastest and most scalable approach to application performance. Hazelcast makes distributed computing simple by offering distributed implementations of many developer-friendly interfaces from Java such as Map, Queue, ExecutorService, Lock and JCache.
Exonum is an extensible open source blockchain framework for building private blockchains which offers outstanding performance, data security, as well as fault tolerance. The framework does not include any business logic, instead, you can develop and add the services that meet your specific needs. Exonum can be used to build various solutions from a document registry to a DevOps facilitation system.
RESTEasy is JAX-RS 2.1 compliant framework for developing rest applications. It is a JBoss project that provides various frameworks to help you build RESTful Web Services and RESTful Java applications. It is a fully certified and portable implementation of the JAX-RS 2.1 specification, a JCP specification that provides a Java API for RESTful Web Services over the HTTP protocol.
Light 4j is a fast, lightweight and cloud-native microservices framework. In this article, we will see what and how hybrid framework works and integrate with RDMS databases like MySQL, also built in option of CORS handler for in-flight request.
Light 4j is fast, lightweight, secure and cloud native microservices platform written in Java 8. It is based on pure HTTP server without Java EE platform. It is hosted by server UnderTow. Light-4j and related frameworks are released under the Apache 2.0 license.
We knew that Apace Spark- the most famous parallel computing model or processing the massive data set is written in Scala programming language. The Apace foundation offered a tool to support the Python in Spark which was named PySpark. The PySpark allows us to use RDDs in Python programming language through a library called Py4j. This article provides basic introduction about PySpark, RDD, MLib, Broadcase and Accumulator.
Scene.js is a JavaScript timeline-based animation library for creating animation websites. As an animated timeline library, it allows you to create a chronological order of movements and positions of objects.
LogicalDOC is both a document management and a collaboration system. The software is loaded with many functions and allows organizing, indexing, retrieving, controlling and distributing important business documents securely and safely for any organization and individual.
OpenPDF is based on a fork of iText version 4. iText is a widely used PDF library but they changed their license and moved to AGPL. In this article, we can see how to read and write to PDF, How to extract text from PDF and How to create password protected PDF.
Each website / blog delivers useful content or service to its users. But website themselves requires some service to monitor and increase its presence. Here are few free services which could be used by Website / Blog. This will be very much helpful for small business owners.
It is a fact the 2020 is not going the way we expected to be but when it comes to technology breakthrough we can say 2020 will be the heir of greatness. <br />Speaking of technical breakthroughs we have got artificial intelligence which is known to be taking over the mankind like a wildfire. Everything around us is connected through AI be it shopping travelling or even reading. Every other activity of ours is transforming into a whole new extent.
OLAP (Online Analytical Processing), Reporting, Data mining related tasks are usually done by Business intelligence products. They do powerful Extraction, Transformation and Loading (ETL) the data and provides various reports. They use relational database as its back end. How could they generate better reports? Will column DB do a better job?
MongoDB is a popular and widely used open source NoSQL database. MongoDB is a distributed database at its core, so high availability, horizontal scaling, and geographic distribution is quite possible. It is licensed under Server Side Public License. Recently they moved to Server Side Public License, before that MongoDB was released under AGPL. This article will provide basic example to connect and work with MongoDB using Java.
Ehcache from Terracotta is one of Java's most widely used Cache. It is concurrent and highly scalable. It has small footprint with SL4J as the only dependencies. It supports multiple strategies like Expiration policies, Eviction policies. It supports three storage tiers, heap, off-heap, disk storage. There are very few caching products supports multiple tier storage. If you want to scale, you cannot store all items in heap there should be support for off-heap and disk storage. Ehcache is licensed under Apache 2.0. In this article, we can see about basic usage of Ehcache.
Redis is an open source (BSD licensed), in-memory data structure store, used also as a database cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams. This article explains about how to communicate with Redis using Java client Jedis.
We have large collection of open source products. Follow the tags from
Tag Cloud >>
Open source products are scattered around the web. Please provide information
about the open source projects you own / you use.
Add Projects.