No Results
No results found for your search. Please try another term.
Free Sample G4 Files Download
Download free sample G4 files to explore the CCITT Group 4 compression format for bi-level images commonly used in scanned documents and faxes.
What Is This Tool?
This resource provides free sample files in the G4 format, a lossless 2D compression method designed for black-and-white images. These samples help users understand and test how G4 compression works for scanned documents, faxes, and other monochrome images.
How to Use This Tool?
- Download the provided sample G4 files to evaluate the format’s compression performance on black-and-white images.
- Use the samples to test TIFF or PDF processors that incorporate G4 compressed images.
- Analyze how G4 compression manages clean binary images such as line art and signatures.
- Assess compatibility with fax or document scanning software by integrating these sample files.
Key Features
- Lossless compression of 1-bit bi-level images using the Modified Modified READ (MMR) algorithm.
- Efficient storage and transmission of monochrome scanned documents and faxes.
- Supports exact pixel preservation ideal for OCR and legal document archiving.
- Widely compatible with TIFF and PDF containers as well as fax equipment.
Examples
- Archive black-and-white scanned pages inside a TIFF file using G4 compression to save storage space.
- Encode text documents for fax transmission via G4 to ensure efficient bandwidth usage.
- Store technical drawings strictly as 1-bit images for precise reproduction without pixel loss.
Common Use Cases
- Archiving monochrome scanned documents as OCR image sources.
- Faxing text pages requiring low bandwidth and lossless encoding.
- Embedding line art, signatures, or black-and-white technical drawings into documents.
- Including clean, binary images in printing and document exchange workflows.
Tips & Best Practices
- Use G4 compression exclusively for bi-level images to maximize compression efficiency.
- Avoid applying G4 to noisy or dithered scans as it may increase file size.
- Leverage G4 for black-and-white line art and text rather than color or grayscale photos.
- Ensure compatibility by embedding G4 images within supported containers like TIFF or PDF.
Limitations
- Restricted to 1-bit black-and-white images; not suitable for grayscale or color photos.
- Compression can be ineffective with noisy or dithered scans, leading to larger file sizes.
- No support for progressive rendering, alpha transparency, or embedded color profiles.
- Not ideal for complex photographic content where multibit or lossy compression is better.
Frequently Asked Questions
- What type of images is the G4 format designed for?
- G4 is intended for bi-level, 1-bit black-and-white images such as scanned documents and faxes.
- Can G4 compression be used for color photographs?
- No, G4 is limited to black-and-white images and does not support grayscale or color.
- Which containers commonly include G4 compressed images?
- G4 images are commonly embedded within TIFF and PDF file formats.
Key Terminology
- G4
- A lossless compression method using Modified Modified READ (MMR) for bi-level (1-bit) images.
- Bi-level Image
- An image with only two colors, usually black and white, represented with 1-bit depth.
- TIFF
- A flexible image container format commonly used for storing high-quality scanned images.