Open-source alternatives to UCrop

Thumbor is a dynamic image processing service and proxy server that resizes, crops, and filters images on demand via URL parameters. It functions as a URL-based image manipulator that generates specific image versions from source assets to optimize web delivery. The system includes a smart cropping engine that uses facial feature detection and computer vision to automatically center thumbnails on the most relevant visual content. To prevent unauthorized parameter tampering and malicious requests, it employs signature-based request validation and domain-based source whitelisting. Broad capabi

AndroidCommon is a comprehensive utility library designed to provide reusable infrastructure and architectural patterns for Android application development. It organizes common helper functions into stateless modules, offering consistent access to system resources, data parsing logic, and core infrastructure abstractions. The framework distinguishes itself by providing specialized components for managing background tasks and complex user interface interactions. It includes utilities for coordinating background file transfers through the system download manager and executing shell commands to

ImagePicker is a mobile image picker library that provides a user interface for selecting, rotating, and cropping images from a device gallery or camera. It includes a multi-image selection interface that allows users to pick one or multiple photos up to a specified limit. The library features a customizable image loader interface, allowing the replacement of default system image retrieval with third-party loading libraries. It also includes an image cropping tool for trimming photos into custom rectangular or circular shapes with precise dimensions and aspect ratios. The project covers medi

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

ImageSharp is a .NET image processing library and manipulation framework used for decoding, encoding, and modifying digital images. It functions as a comprehensive toolkit for resizing, cropping, and applying pixel-level filters while managing color profiles and pixel data across various file formats. The project integrates a 2D vector graphics engine and a typography rendering engine to draw geometric shapes, paths, and complex stylized text onto images. It also includes a geometry boolean operation library for calculating intersections, unions, and differences between complex polygons and c

PhotoView is a reusable Android UI component that provides a zoomable image view. It is designed to handle gesture detection, image scaling, and coordinate tracking for images within Android applications. The component enables users to enlarge and move images through pinch-to-zoom and panning gestures. It also includes capabilities for image tap detection to facilitate interactive responses. The library manages image interactions through matrix-based scaling and touch event interception. It includes a system for tracking image transformations and notifying observers when zoom or scroll posit

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

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

opencv4nodejs is a set of JavaScript wrappers and a C++ native addon that provides Node.js bindings for the OpenCV library. It functions as a computer vision library and image processing framework, exposing high-performance C++ algorithms to a JavaScript environment. The project enables the execution of vision algorithms for detecting faces, tracking objects, and analyzing visual data using deep neural networks. It includes capabilities for data pattern classification, text pattern recognition, and the identification of facial landmarks and gestures. The framework covers a broad capability s

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

Hellocharts-android is a data visualization library and charting framework for Android applications. It provides a collection of custom view components used to render datasets as visual elements, such as line, column, and pie charts. The library supports interactive visualizations that allow users to navigate data through touch gestures, including pinching, scrolling, and panning. It also includes built-in capabilities for animating data points and chart elements to create smooth visual transitions during dataset updates. The framework covers a broad range of visualization needs, including c

RoundedImageView is an Android library providing custom view implementations for rendering images with rounded corners, circles, and ovals. It uses hardware acceleration to ensure high performance and smooth edge quality when clipping images into these shapes. The library includes a customizable image border view that draws consistent strokes around images, scaling automatically as the view size changes. It also provides a tiled image background view that repeats image patterns across a surface using various tiling modes.

CircleImageView is a custom Android UI component that renders rectangular images as perfect circles with smooth antialiased edges. It functions as an extension of the native Android image view, overriding the drawing pipeline to provide specialized circular masking. The component specifically supports the creation of user profile avatars by providing customizable borders, internal padding, and background fill colors. These visual styles can be defined through custom XML attributes during the view initialization process.

AndroidUtilCode is an Android utility library and system API wrapper designed to reduce development boilerplate. It provides a collection of helper classes for common tasks including system settings management, file I/O, and hardware access. The project distinguishes itself through a comprehensive toolset for device management and UI assistance. It includes specialized capabilities for monitoring battery status, managing system volume and brightness, and implementing UI helpers to prevent duplicate click events. It also provides a dedicated system for coordinate conversion between different m

FilePond is a JavaScript library designed for managing file uploads, providing a browser-based component that handles selection, validation, and asynchronous transmission to remote servers. It functions as a web form input element that supports drag-and-drop interactions, file property verification, and queue management to ensure that only permitted content is submitted. The library distinguishes itself through extensive client-side media processing capabilities, allowing users to edit, crop, resize, and filter images and videos directly in the browser before transmission. It includes automat

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

Android-Universal-Image-Loader is an image loading library for Android applications designed to download, cache, and display images. It functions as a bitmap cache manager and processing framework that handles the retrieval of assets from remote URLs or local files. The library includes specialized utilities for extracting static frames from video files to generate thumbnails. It also provides a framework for applying visual transformations to loaded images, such as circular crops and rounded corners. The system manages performance through a two-tier caching hierarchy using both memory and d

Compressor is an Android image compression library designed to reduce the file size and dimensions of images within mobile applications. It functions as a bitmap optimizer that adjusts image quality and formats to minimize storage footprints and improve network upload speeds. The library operates as an asynchronous image processor, utilizing background threads and reactive streams to compress high-resolution photos. This execution model prevents user interface freezes and maintains application responsiveness during heavy image manipulation tasks. The project covers a broad range of image opt

jetson-inference is a set of libraries and tools for executing optimized deep learning models on embedded GPU hardware. Its primary purpose is to enable real-time computer vision and AI inference at the edge with low latency and high throughput. The project distinguishes itself through high-performance streaming analytics and the ability to execute concurrent AI pipelines on auto-grade silicon. It provides specialized support for multi-sensor stream processing, utilizing zero-copy data transport to load camera frames directly into GPU memory. The codebase covers a broad surface of capabiliti

PhotoView is a custom Android view implementation designed to display high-resolution images with native support for zoom and pan gestures. It provides a zoomable image view and a matrix controller to manage how images are scaled and translated within a mobile user interface. The library handles the detection of pinch-to-zoom and tap gestures to enable interactive image navigation. It manages the transformation matrix of the image to ensure smooth magnification and provides viewport constraints to align photo edges with screen boundaries. The project covers the broader requirements of mobile

📐 Configurable Custom Crop widget for Android

Kingfisher is a library for downloading, caching, and displaying remote images in Swift applications. It provides an integrated framework that manages the entire lifecycle of remote assets, from initial network retrieval to final rendering within user interface components. The library distinguishes itself through a two-tiered storage mechanism that balances rapid access via volatile memory with persistent availability through disk caching. It features a modular processing pipeline that allows for dynamic image transformations, such as applying filters or geometric modifications, during the re

Pixelfed is a decentralized, self-hosted photo sharing platform and social network. It uses the ActivityPub protocol to enable federation, allowing independent server instances to share user profiles, media, and posts across a distributed network. The platform distinguishes itself with a focus on media portability and processing, featuring tools for importing content from Instagram and utilizing client-side WebGL for image filter processing. It employs a driver-based storage abstraction to manage media across local disks or S3-compatible cloud object storage. The system includes capabilities

OCRmyPDF is a tool for converting image-based PDF files into machine-readable documents by adding a searchable text layer via optical character recognition. It functions as a multi-language processor capable of detecting and extracting text in over 100 different languages using linguistic data packs. The software includes a PDF image optimizer to remove image artifacts and correct page skew to improve recognition accuracy. It also provides a converter to transform scanned documents into the PDF/A standard for long-term digital archiving. The system manages PDF optimization by compressing emb

Agent-S is a multimodal AI agent and LLM desktop automation framework designed to control operating systems through graphical user interface interactions. It functions as a computer use interface, utilizing vision-language grounding to translate natural language goals into precise screen coordinates and system actions. The project differentiates itself by combining structured accessibility tree inspection with vision-based element localization. It manages cross-application workflows by mapping conceptual descriptions to physical pixels and simulating low-level keyboard and mouse events to mov

This is a comprehensive library of code examples and reference implementations for building cross-platform user interfaces with Flutter. The project provides a collection of demo applications and guides designed to illustrate the implementation of design patterns, animation techniques, and testing workflows. The repository features specific demonstrations for native integration, including examples of embedding modules into existing native applications, using platform channels, and bridging native code with the framework. It also serves as an animation reference, providing implementations for

Aseprite is a specialized graphics editor and animation suite designed for the creation of pixel-based artwork. It provides a comprehensive environment for managing multi-layered animation sequences, offering tools for frame-by-frame design, onion skinning, and real-time motion previews. The application is built to handle both indexed color palettes and full-color RGB editing, allowing users to maintain precise control over pixel data and transparency. What distinguishes Aseprite is its focus on programmable workflows and game asset production. It features a scriptable command architecture th