Digitally Sign IMAGE Documents in Java (Code Example)

Add Digital Signatures to IMAGE in Java

Add custom digital signatures to IMAGE documents in Java based on PFX certificate files. The all-in-one electronic signature API easily integrates with your Java application to give you a personalized document signing experience using a few lines of code.

Instantiate Signature with (IMAGE) as input document
Instantiate DigitalSignOptions object with certificate & password details
Call sign method of Signature class and pass DigitalSignOptions to it

Work with IMAGE Signature API

You require GroupDocs.Signature namespace to digitally sign documents in Java & J2SE applications. Use signature manipulation features to customize sign, search and signature verification processes, manage eSignature colors, styling and overall appearance.

Get the respective assembly files from downloads or fetch the whole package from Maven to add ‘Conholdate.Total` directly in your workspace.

Add Text Signatures to IMAGE in Java

Add customized text signature to a IMAGE document in Java using advanced text settings such as font color, size, name, text alignment and border adjustment.

Create a new instance of Signature class and pass input document
Instantiate the TextSignOptions object and specify text signature options
Call sign method of Signature class instance and pass TextSignOptions to it

eSign Remotely Located Documents

The document eSign API enables you to load & display remotely located documents from various cloud document storage sources such as stream, local disk, URL, FTP, Amazon S3, and Azure Blob storage. Using document information extraction feature - fetch the basic information about the source document file (IMAGE) along with extracting other valuable document information such as file type, file size, pages count, page height and width etc.

Add Image Signatures to IMAGE in Java

Using Conholdate.Total for Java - insert custom image as an electronic signature to a IMAGE document in Java. Add company logo, stamp icon or name using different colors and text effects.

Create a new instance of Signature class and pass input document to it
Instantiate the ImageSignOptions object and specify image signature options
Call sign method of Signature class instance and pass ImageSignOptions to it

Image Representation of Document Pages

Apply digital signatures to a wide range of document formats and generate the image representation of the already signed document pages in PNG, JPG or BMP formats. You can easily preview the complete document as a whole or choose to display some specific pages based on page numbers or page ranges.

Using advanced document previewing features - easily hide digital signatures from the signed documents while generating the document preview.

What is IMAGE file format?

An image file format serves as a standardized method for storing digital images. The most prevalent type of image file is the raster image file, which consists of pixels arranged in a particular format and saved as a single file. However, there are also other widely used image file formats, including vector images, photographic images, and 3D images. Each image file format is specifically designed to store images in a particular manner, optimized for various purposes such as printing or viewing on computer monitors.

One of the most commonly utilized image file formats is JPEG (Joint Photographic Experts Group). JPEG files are widely employed for compressing and storing photographic images, making them suitable for online sharing, websites, and digital photography. They strike a balance between image quality and file size, ensuring efficient storage and transmission.

Another popular image file format is GIF (Graphics Interchange Format). GIF files support both still and animated images, making them ideal for simple animations, logos, and graphics. They use a lossless compression technique, which preserves image quality but may result in larger file sizes compared to other formats.

TIFF (Tagged Image File Format) is a versatile image file format commonly used in professional settings. It supports high-quality images with lossless compression, making it suitable for tasks like printing, publishing, and graphic design. TIFF files preserve all image data, providing flexibility for editing and preserving image fidelity.

PNG (Portable Network Graphics) is a widely adopted image file format known for its lossless compression and support for transparent backgrounds. PNG files are often used for web graphics, logos, and images requiring high-quality with a smaller file size.

Understanding the various image file formats allows users to choose the most appropriate format for their specific needs, ensuring optimal image quality, file size, and compatibility. Whether it’s sharing photographs, creating animations, or producing high-quality prints, selecting the right image file format is crucial for achieving the desired results.

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Digitally Sign IMAGE in Java