Convert DJVU to PDF via Ruby Cloud API
Transform DJVU into PDF using native Ruby Cloud APIs without needing any image editor or 3rd-party libraries.
Get StartedHow to Convert DJVU to PDF Using Ruby Cloud API
Aspose.Imaging.Cloud for Ruby API which is a feature-rich, powerful and easy to use image manipulation and conversion Cloud API for Ruby platform. You can download its latest version directly from rubygems.org or install it from gem command line.
Command Prompt
> gem install aspose_imaging_cloud
Steps to Convert DJVU to PDF via Ruby Cloud API
Developers can easily load & convert DJVU files to PDF in just a few lines of code.
- Load DJVU file as stream
- Create & set the instance of CreateConvertedImageRequest
- Call the CreateConvertedImage method
- Get converted image from response stream
System Requirements
Aspose.Imaging Cloud for Ruby is supported on all major operating systems. Just make sure that you have the following prerequisites.
- Ruby version >= 2.5.1
Convert DJVU to PDF - Cloud
| require 'fileutils' | |
| require 'aspose-imaging-cloud' | |
| IMAGE_FILE_NAME= 'example_image.djvu'; | |
| IMAGES_FOLDER = 'ExampleImages'; | |
| CLOUD_FOLDER = 'CloudImages'; | |
| OUTPUT_FOLDER = 'Output'; | |
| # Get ClientId and ClientSecret from https://dashboard.aspose.cloud/ | |
| # or use on-premise version (https://docs.aspose.cloud/imaging/getting-started/how-to-run-docker-container/) | |
| imaging_api = AsposeImagingCloud::ImagingApi.new(client_secret, client_id, 'https://api.aspose.cloud') | |
| # Convert the image from cloud storage | |
| def convert_image_from_storage | |
| input_image = File.join(IMAGES_FOLDER, IMAGE_FILE_NAME) | |
| upload_file_request = AsposeImagingCloud::UploadFileRequest.new(File.join(CLOUD_FOLDER, IMAGE_FILE_NAME), input_image) | |
| result = self.imaging_api.upload_file(upload_file_request) | |
| if result.errors.any? | |
| puts('Uploading errors count: ' + result.errors.size.to_s) | |
| # Please refer to | |
| # https://docs.aspose.cloud/imaging/supported-file-formats/#convert | |
| # for possible output formats | |
| format = 'pdf' # Resulting image format | |
| folder = CLOUD_FOLDER # Input file is saved at the desired folder in the storage | |
| storage = nil # We are using default Cloud Storage | |
| request = AsposeImagingCloud::ConvertImageRequest.new(IMAGE_FILE_NAME, format, folder, storage) | |
| converted_image = imaging_api.convert_image(request) | |
| # Save the image file to output folder | |
| filename_part = File.basename(IMAGE_FILE_NAME, ".*") | |
| image_name = filename_part + '.' + 'pdf' | |
| path = File.absolute_path(File.join(OUTPUT_FOLDER, image_name)) | |
| File.write(path, converted_image) | |
| end | |
| # Convert an image. Image data is passed in a request stream | |
| def create_converted_image_from_request | |
| # Please refer to | |
| # https://docs.aspose.cloud/imaging/supported-file-formats/#convert | |
| # for possible output formats | |
| format = 'pdf' # Resulting image format | |
| storage = nil # We are using default Cloud Storage | |
| out_path = nil # Path to updated file (if this is empty, response contains streamed image) | |
| input_stream = File.open(File.join(IMAGES_FOLDER, IMAGE_FILE_NAME), 'r') | |
| request = AsposeImagingCloud::CreateConvertedImageRequest.new(input_stream, format, out_path, storage) | |
| converted_image = imaging_api.create_converted_image(request) | |
| # Save the image file to output folder | |
| filename_part = File.basename(IMAGE_FILE_NAME, ".*") | |
| image_name = filename_part + '.' + 'pdf' | |
| path = File.absolute_path(File.join(OUTPUT_FOLDER, image_name)) | |
| File.write(path, converted_image) | |
| end |
About Aspose.Imaging Cloud API for Ruby
Aspose.Imaging Cloud API is an image processing solution to process images (photos) within your cloud or web applications. It offers: cross-platform Image processing, including but not limited to conversions between various image formats (including uniform multi-page or multi-frame image processing), transformations (resize, crop, flip&rotate, grayscale, adjust), advanced image manipulation features (filtering, deskewing), AI features (i.e. object detection and reverse image search). It’s a Cloud API and does not depend on any software for image operations. One can easily add high-performance image conversion features with Cloud APIs within projects. Flexible integrations options including SDKs for various languages (Python, Ruby, .NET, Java, NodeJS, PHP) and the use of the REST API allow to make the integration easy.
Convert DJVUs via Online App
Convert DJVU to PDF documents by visiting our Live Demos website. The live demo has the following benefits
DJVU What is DJVU File Format
DjVu, pronounced as “déjà vu”, is a graphics file format intended for scanned documents and books especially those which contain the combination of text, drawings, images and photographs. It was developed by AT&T Labs. It uses multiple techniques like image layer separation of text and background images, progressive loading, arithmetic coding and lossy compression for bitonal images. Since DJVU file can contain compressed yet high-quality colour images, photographs, text, and drawings and can be saved in less space therefore, it's used on web as eBooks, manuals, newspapers, ancient documents, etc.
Read MorePDF What is PDF File Format
Portable Document Format (PDF) is a type of document created by Adobe back in 1990s. The purpose of this file format was to introduce a standard for representation of documents and other reference material in a format that is independent of application software, hardware as well as Operating System. The PDF file format has full capability to contain information like text, images, hyperlinks, form-fields, rich media, digital signatures, attachments, metadata, Geospatial features and 3D objects in it that can become as part of source document.
Read MoreOther Supported Conversions
Using Ruby Cloud API, one can easily convert different formats including.