RMagick is an interface between Ruby and ImageMagick.

Captcha Gem for Rails, which generates captcha image by Rust.

xlsx spreadsheet generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx helps you create beautiful Office Open XML Spreadsheet documents (Excel, Google Spreadsheets, Numbers, LibreOffice) without having to understand the entire ECMA specifica...

Ruby/Graphviz provides an interface to layout and generate images of directed graphs in a variety of formats (PostScript, PNG, etc.) using GraphViz.

Attach images to pages ins Refinery CMS

FastImage finds the size or type of an image given its uri by fetching as little as needed.

Development tool to mock API endpoints quickly and easily (docker image available)

Command line tool and ruby interface to optimize (lossless compress, optionally lossy) jpeg, png, gif and svg images using external utilities (advpng, gifsicle, jhead, jpeg-recompress, jpegoptim, jpegrescan, jpegtran, optipng, oxipng, pngcrush, pngout, pngquant, svgo)

Ruby gem generating thumbnail images from a given URL.

LINES lets you manage your posts in a clear, consistent frontend. The gracefully slender editor keeps your editing simple and lets you just splash around in your ideas. Once you're happy, just hit publish and see your text, code examples, images, and links shine.

Uses wkhtmltoimage to create Images using HTML

This pure Ruby library can read and write PNG images without depending on an external image library, like RMagick. It tries to be memory efficient and reasonably fast. It supports reading and writing all PNG variants that are defined in the specification, with one limitation: onl...

Jekyll Picture Tag adds responsive images to your Jekyll static site. It automatically creates resized source images, is fully configurable, and covers all use cases, including art direction and resolution switching, with a little YAML configuration and a simple template tag.

Jekyll Picture Tag is a liquid tag that adds responsive images to your Jekyll static site. It follows the picture element pattern, and polyfills older browsers with Picturefill. Jekyll Picture Tag automatically creates resized source images, is fully configurable, and covers all use c...

rails_kindeditor will helps your rails app integrate with kindeditor, including images and files uploading.

A Test Kitchen Driver for Docker & Chef Infra optimized for rapid testing using Chef Infra docker images

Add width, height and size methods to paperclip images

Comprehensive Excel/CSV import/export for Spree, Products,Images, any model with full associations

High-level wrapper for processing images for the web with ImageMagick or libvips.

Extract the dominant colors from an image.