imgp - Multi-core batch image resizer and rotator

•    Python

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imgp is a command line image resizer and rotator for JPEG and PNG images. It can resize (or thumbnail) and rotate thousands of images in a go, at lightning speed, while saving significantly on storage. Powered by multiprocessing, an intelligent adaptive algorithm, recursive operations, shell completion scripts, EXIF preservation (and more), imgp is a very flexible utility with well-documented easy to use options.

image-processing image-compression image-manipulation image-optimization image-resize image-rotate multiprocessing standalone command-line terminal

Crunch - Insane(ly slow but wicked good) PNG image optimization

•    Python

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Crunch is a tool for lossy PNG image file optimization. It combines selective bit depth, color type, and color palette reduction with zopfli DEFLATE compression algorithm encoding using the pngquant and zopflipng PNG optimization tools. This approach leads to a significant file size gain relative to lossless approaches at the expense of a relatively modest decrease in image quality (see example images below). Historical benchmarks with the files included in Cédric Louvrier's PNG Test Corpus versus other commonly used PNG optimization software are available in BENCHMARKS.md.

png png-compression compression image-quality image-processing images image image-compression pngquant zopflipng lossy lossy-compression

Scrimage - Scala image processing library

•    Scala

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Scrimage is a consistent, idiomatic, and immutable scala library for manipulating and processing of images. The aim of the this library is to provide a quick and easy way to do the kinds of image operations that are most common, such as scaling, rotating, converting between formats and applying filters. It is not intended to provide functionality that might be required by a more "serious" image processing application - such as face recognition or movement tracking.

jpeg filters image image-processing imaging-library

Marvin - Image Processing Framework

•    Java

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Marvin is an image processing framework that provides features for image and video frame manipulation, multithreading image processing, image filtering and analysis, unit testing, performance analysis and addition of new features via plug-in. It can process camera frames for video filtering, object tracking, augmented reality, motion detection and analysis among other things.

thumbnails image-library image-processing image-resizer

Flyimg - Microservice to resize and crop images on the fly

•    PHP

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Image resizing, cropping and compression on the fly with the impressive MozJPEG compression algorithm. One Docker container to build your own Cloudinary-like service.You pass the image URL and a set of keys with options, like size or compression. Flyimg will fetch the image, convert it, store it, cache it and serve it. The next time the request comes, it will serve the cached version.

image image-processing resize-images crop-image docker jpeg png webp gif compression-algorithm flysystem microservice mozjpeg imagemagick compression crop face-detection image-api image-service

iView.NET

•    DotNet

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iView.NET is a light weight open source free to use and redistribute image viewer, manager and editor software application all rolled into one.

image image-editing image-processing image-resizer

Pixels.JS - An image filtering library, containing over 70 image filters for use in-browser and with Node

•    Javascript

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Pixels.JS is an image filtering library with over 70 photo filters for use in the browser or with Node.JS. Image filtering comprises vintage filters, solarizers, inverters, and over ninety more. You can explore these in the Flashback web app, which makes use of the library.

image-filtering image-pixel-manipulation image-processing browser node image-filter

Jimp - An image processing library written entirely in JavaScript for Node

•    Javascript

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An image processing library for Node written entirely in JavaScript, with zero native dependencies. It supports image manipulation methods like Blit an image, Blur an image, Various color manipulation methods, Resize, Scale and Rotate the image, Apply a dither effect to an image, Mask one image with another, Print text onto an image (watermark) and lot more.

image image-processing image-manipulation png jpg jpeg bmp resize scale crop

Paint.NET Bulk Image Processor

•    

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PDNBulkUpdater is a plug-in for Paint.NET that allows you to efficiently perform operations such as resizing and converting multiple images at the same time. The plug-in contains both an integrated UI and a command line tool.

batch-conversion batch-file-renamer bulk-copy bulk-edit image-editing image-processing image-resizer

imaginary - Fast, simple, stateless HTTP microservice for high-level image processing with first-class support for Docker & Heroku

•    Go

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Fast HTTP microservice written in Go for high-level image processing backed by bimg and libvips. imaginary can be used as private or public HTTP service for massive image processing with first-class support for Docker & Heroku. It's almost dependency-free and only uses net/http native package without additional abstractions for better performance.Supports multiple image operations exposed as a simple HTTP API, with additional optional features such as API token authorization, gzip compression, HTTP traffic throttle strategy and CORS support for web clients.

image image-processing resize-images libvips crop-image microservice docker watermark jpeg png webp gif go-library

Thumbnailator - A thumbnail generation library for Java

•    Java

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Thumbnailator is a thumbnail generation library for Java. Learning how to use the Image I/O API, Java 2D API, image processing, image scaling techniques etc is fairly difficult task. Thumbnailator will take care of all those things for you. Thumbnailator is a single JAR file with no dependencies to external libraries, making development and deployment simple and easy. It also provides support to watermark, rotate, fluent API.

api images library thumbnails image-library watermark image-processing image-resizer

GraphicsMagick

•    C++

---

GraphicsMagick is the swiss army knife of image processing. It provides a robust and efficient collection of tools and libraries which support reading, writing, and manipulating an image in over 88 major formats including important formats like DPX, GIF, JPEG, JPEG-2000, PNG, PDF, PNM, and TIFF.

image-processing image-conversion image-identification library

imgscalr - Java Image-Scaling Library

•    Java

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imgscalr is a Java Image-Scaling Library implementing Chris Campbell's incremental scaling algorithm as well as Java2D's "best-practices" image-scaling techniques. imgscalr also provides support for applying arbitrary BufferedImageOps against resultant images directly in the library. It can fit an image to a specific width or height regardless of its orientation using a Mode argument.

thumbnails image-library image-processing image-resizer

kdenlive - Powerful multi-track video editor

•    C++

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Kdenlive is a video editor, which supports DV, AVCHD (experimental support) and HDV editing. Kdenlive relies on several other open source projects, such as FFmpeg and MLT video framework. It is designed to answer all needs, from basic video editing to semi-professionnal work. Kdenlive can read, edit and export Flash video. Kdenlive supports most audio formats for reading, mixing and exporting. It also offers experimental support for non-destructive audio and video codec.

video-editor video

essential-image-optimization - Essential Image Optimization - an eBook

•    CSS

---

Bring up a terminal and type node --version. Node should respond with a version at or above 0.10.x. If you require Node, go to nodejs.org and click on the big green Install button.

images image-processing image-optimization jpeg png gif compression image-compression image optimisation webp mozjpeg

pesdk-android-demo - A fully customizable photo editor for your app.

•    Java

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The PhotoEditor SDK is a powerful and multifaceted tool which enables you to equip your Android application with high-performant photo editing capabilities. The PhotoEditor SDK is written in Java and can easily be customized to entirely blend with your CI and provide your users with the exact feature set your use-case requires. The SDK ships with a large variety of filters, covering all state of the art style- and mood settings that can be previewed in real-time. Unlike other apps that allow a live preview of filters, the PhotoEditor SDK even provides a live preview when using high-resolution images.

sdk android renderscript image-processing image-manipulation opengl demo-app framework photo-editor filter frames crop overlay image-editor brush text

Poof! Image Editor

•    

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Poof is an open-source command-driven image manipulation program. It is intended for fast editing of one or many image files.

command-line image-convertor image-editing image-manipulation image-processing

WXImageCompress - Image size quality compression, very close to WeChat picture compression strategy

•    Swift

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Image size quality compression, very close to WeChat picture compression strategy

ios-image ios-image-compress wechat-image image-compression image-compressor image-composer

IJG - Independent JPEG Group

•    C

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IJG is an informal group that writes and distributes a widely used free library for JPEG image compression. JPEG is designed for compressing either full-color or gray-scale images of natural, real-world scenes.

jpeg image image-library image-compression image-encoding

GPUImage - An open source iOS framework for GPU-based image and video processing

•    Objective-C

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The GPUImage framework is a BSD-licensed iOS library that lets you apply GPU-accelerated filters and other effects to images, live camera video, and movies. In comparison to Core Image (part of iOS 5.0), GPUImage allows you to write your own custom filters, supports deployment to iOS 4.0, and has a simpler interface. However, it currently lacks some of the more advanced features of Core Image, such as facial detection. For massively parallel operations like processing images or live video frames, GPUs have some significant performance advantages over CPUs. On an iPhone 4, a simple image filter can be over 100 times faster to perform on the GPU than an equivalent CPU-based filter.