Open-source alternatives to Imaginary

Imagor is a high-performance image processing server and Go library that functions as an on-demand image proxy. It provides a secure transformation API for resizing, filtering, and optimizing images, as well as a tool for generating static thumbnails from video files. The system distinguishes itself by using a demand-driven processing engine to handle large images without loading entire files into memory. It features cryptographic request signing to prevent unauthorized URL tampering and employs header-based format negotiation to automatically serve the most efficient image format supported b

Imageflow is a high-performance image manipulation library and composition engine available as a C-compatible library, a command-line image processor, and a dynamic image processing server. It provides the means to decode, encode, and apply complex visual transformations to images through programmatic interfaces, JSON job files, or on-the-fly URL query strings. The system distinguishes itself through a graph-based processing pipeline that allows for single-pass multi-format encoding, generating multiple image sizes and formats from a single decode to reduce overhead. It further features a res

Jimp is a JavaScript image processing library and Node.js manipulation tool designed to perform image transformations and edits entirely within a JavaScript environment. It is a zero-dependency image library that operates without requiring native binaries or external system software dependencies. The project provides a programmatic interface for automated image transformations, including resizing, cropping, and filtering. It supports the creation of custom image pipelines and server-side image editing by processing data without relying on native system tools.

Jimp is a zero-dependency JavaScript image processing library and programmatic editor designed for manipulating, resizing, and filtering images in Node.js. It functions as a multi-format image encoder and extensible pipeline that operates entirely in JavaScript to ensure portable deployment across different environments without requiring native system dependencies. The engine features a modular architecture that allows for custom image processor builds and the registration of custom processing plugins. This extensibility enables the addition of specific visual effects and custom file-type enc

smartcrop.js is a JavaScript image processing tool and library designed for content-aware image cropping. It provides a face-aware cropping algorithm that calculates optimal crop coordinates to preserve the most important visual content within an image. The project prioritizes human faces to ensure people remain the central focus of the crop. It utilizes a content-aware approach to determine the best coordinates for a target width and height, allowing for dynamic resizing across different screen sizes and aspect ratios. The toolset includes a command line interface for automating the resizin

Android-Image-Cropper is an image cropping library for Android applications designed to trim and resize photos sourced from cameras or galleries. It functions as a bitmap manipulation tool capable of rotating, flipping, and scaling images to achieve specific dimensions. The library features an aspect ratio constrained cropper that limits the cropping window to fixed shapes or ratios to ensure consistent image output. It handles orientation adjustments by reading embedded metadata to automatically rotate or flip images during the cropping process. The toolkit covers a broad range of image pro

Imaging is a Go library for image processing that provides a set of functions for common image manipulation tasks. It offers capabilities for adjusting image colors, applying convolution filters, blurring, cropping, resizing, sharpening, and correcting orientation based on EXIF data. The library supports resizing images to exact dimensions or bounding boxes with aspect ratio preservation and configurable resampling filters. Color adjustments include gamma, contrast, brightness, and saturation controls, while blurring and sharpening use Gaussian-based algorithms with configurable sigma paramet

Cropper is a JavaScript image cropping library and HTML5 canvas image editor. It serves as a web-based image manipulation tool that allows users to visually select and trim specific areas of an image directly within a browser. The library provides a visual interface for defining precise crop areas with configurable aspect ratios and zoom controls. It includes tools to rotate, scale, and zoom images to align subjects before exporting the final result. The tool handles browser-based image processing by generating a canvas element from a selected image area for use or download. It manages crop

gm is a JavaScript image processing library and Node.js manipulation tool that serves as a programmatic wrapper for the GraphicsMagick engine. It translates JavaScript method calls into shell commands to automate the resizing, cropping, and transformation of images. The library provides an interface to execute specific GraphicsMagick operations while allowing raw command passthrough for custom arguments or engine features not covered by the standard API. Its capabilities cover geometric manipulation, color and tone adjustment, and image quality optimization. It includes tools for image compo

This project is an image processing library designed for manipulating pixel data, applying visual filters, and adjusting image appearance. It functions as a low-level tool for processing raw pixel buffers and managing image data. The library provides a toolkit for image geometry manipulation, including resizing, cropping, flipping, and rotating images. It also serves as an image format converter for encoding and decoding data between common binary file formats and as a metadata extractor for retrieving dimensions and color profiles from file headers. The capabilities cover low-level image pr

Bild is an image processing library implemented in the Go programming language. It provides a collection of algorithmic engines for image manipulation, including a convolution kernel engine for filtering, an image blending tool for layer composition, and a procedural noise generator for creating synthetic textures. The project is distinguished by its procedural generation capabilities, implementing Perlin, Gaussian, binary, and uniform noise algorithms to produce random pixel distributions and organic patterns. It also features a command-line interface that allows users to apply visual effect

Magick.NET is a C# image processing library that serves as a .NET wrapper for ImageMagick. It provides a raster graphics engine for rendering text, drawing graphics, and manipulating images using a native interface. The library handles the conversion of vector files, such as PDF, EPS, and PostScript, into raster formats. It also includes tools for extracting image metadata, such as EXIF data and raw thumbnails. The system covers a wide range of image manipulation capabilities, including resizing, format conversion, watermarking, and the merging of multiple images into static or animated file

This project is a modular image manipulation framework and processing pipeline library designed for Ruby applications. It provides a programmable interface for executing complex image transformations, including resizing, cropping, rotating, and compositing, while managing file input and output parameters. The library distinguishes itself through a fluent, chainable interface that allows developers to construct sophisticated processing workflows by linking modular operations together. It functions as an image transformation engine that delegates heavy lifting to external native binary tools, e

RapidRAW is a non-destructive RAW photo editor and digital asset manager designed for decoding manufacturer RAW formats and applying tonal and color adjustments. It functions as a professional image processor that ensures original source data remains unmodified by saving all edits, masks, and crops to sidecar files. The software features a specialized color grading suite using 3D LUTs, color wheels, and HSL mixers, alongside AI-powered utilities for subject isolation, automatic masking, and generative inpainting for object removal. It distinguishes itself with AI-assisted photo retouching and

This project is a comprehensive sample library and implementation guide for ASP.NET Core. It provides a collection of practical examples and projects that demonstrate how to build web applications, RESTful APIs, and high-performance services. The repository focuses on a variety of architectural patterns, including the development of Minimal APIs, contract-first gRPC services, and real-time communication using WebSockets and Server-Sent Events. It includes detailed implementations for user identity and security, such as token-based authentication and CSRF protection. The codebase covers a bro

Caire is a command-line image processing engine designed for content-aware resizing and batch manipulation. It utilizes seam carving algorithms to adjust image dimensions by identifying and removing low-energy pixels, allowing for the rescaling of images while preserving primary visual subjects and maintaining aspect ratios. The tool distinguishes itself through its ability to protect specific visual elements, such as human faces, from distortion during the resizing process. Users can apply custom binary masks to define regions for protection or forced removal, and the engine provides real-ti

imutils is a computer vision utility toolkit and image processing library designed to simplify common manipulation tasks using OpenCV. It serves as an image analysis helper and geometry transformation tool for automating visual data processing. The toolkit provides specialized capabilities for maintaining image integrity during transformations, such as resizing images while preserving aspect ratios and rotating images without cropping corners. It also includes tools for four-point perspective warping to create top-down views and the extraction of topological skeletons from binary images. The

uCrop is an Android library designed for cropping, rotating, and scaling images within mobile applications. It provides a reusable interface component that allows users to manipulate photos through touch gestures, enabling precise control over visual composition and aspect ratios. The library distinguishes itself by offering extensive customization of the editing interface, allowing developers to adjust colors, frame shapes, and widget visibility to align with specific application design languages. It handles image processing tasks by managing quality, compression formats, and output dimensio

FXBlurView is an iOS blur effect library and image processing tool designed to render Gaussian blur effects over application views and static images. It provides a UIKit background blur view component that can be applied to UI elements to create blurred backgrounds. The library supports both real-time blurring of live application views and the processing of static images. It offers two primary rendering modes: a single-pass static rendering for efficiency and a dynamic background-thread processing mode to maintain user interface responsiveness during heavy computations. Additional capabiliti

Paperclip is an ActiveRecord file attachment manager that links database models to files stored on local disks or cloud storage. It functions as a system for managing file attachments, a fingerprinting system for detecting duplicates and verifying integrity, and a MIME type validator to ensure uploaded files match allowed formats. The project features an image processing pipeline that uses command-line utilities to automatically generate thumbnails and scaled versions of images based on predefined dimensions. It also provides S3 compatible file storage for managing attachments in Amazon S3 an

android-crop is an Android image cropping library and image picker. It provides a reusable view component for selecting and cropping rectangular areas of images within mobile applications. The project includes an interface for launching the system gallery to select photos and a visual tool for users to manually adjust image framing. It manages the process of extracting specific regions of a bitmap and discarding the surrounding pixels.

mmcv is a foundation library for computer vision based on PyTorch. It provides a comprehensive system for constructing convolutional neural networks, a toolkit for image and video preprocessing, and a collection of high-performance deep learning vision operators. The project is distinguished by its hardware-accelerated kernels for complex operations such as deformable convolutions and region pooling. It features a configuration-driven framework that allows for the dynamic instantiation of network layers and the registration of custom modules without modifying code. The library covers a broad

Imageproxy is a Go-based image proxy server that fetches, resizes, and caches remote images. It functions as a secure gateway for delivering external image assets, providing dynamic image resizing and transformation via URL parameters. The server implements security controls to prevent proxy abuse and unauthorized hotlinking. These include request signature verification using HMAC, allow-list based source filtering for remote hosts, and referrer restrictions. It also utilizes MIME-type content filtering to ensure only supported file formats are processed. The project includes a caching layer

Masuit.Tools is a comprehensive static utility library for .NET and ASP.NET Core development. It provides a broad collection of reusable helper methods and infrastructure components that cover common programming tasks without requiring dependency injection or instance management. The library is organized as flat utility classes, making its functionality directly accessible from anywhere in a project. The toolkit distinguishes itself through a wide range of integrated capabilities that go beyond typical utility libraries. It includes a multithreaded range-request file downloader with pause and

GPUImage is a GPU-accelerated image processing framework for iOS designed to apply real-time filters and effects to images and video. It functions as a processing engine and fragment shader library that manages textures and shaders for efficient visual data manipulation. The framework utilizes a chainable filter architecture and a texture-based data pipeline to pass image data between processing stages without expensive memory transfers. It enables the creation of bespoke visual effects through the authoring of custom fragment shaders and provides mechanisms to synchronize texture data with e

jsQR is a JavaScript library for locating and decoding QR codes directly within a browser or Node.js environment. It functions as a client-side scanner and decoder that extracts text and data from images using pixel arrays, removing the need for server-side processing. The library provides tools for QR code localization to identify the exact coordinates of corners and alignment patterns within a larger image. It uses image pattern recognition to isolate the QR code and extract its encoded content. Its internal operations cover binarization-based thresholding, geometric pattern localization,

GoCV is a computer vision library and Go language binding for OpenCV. It serves as an image processing toolkit and deep learning inference engine, providing programmatic access to a wide range of algorithms for image manipulation, object detection, and video analysis. The project differentiates itself through high-performance native bindings and hardware acceleration. It utilizes a foreign function interface to map Go calls to C++ functions and includes a hardware-agnostic backend dispatch to route neural network tasks to computation engines such as CUDA and OpenVINO. The library covers a br