About
ePerforationGauge is a specialized desktop tool for stamp collectors and philatelists that digitally replicates the functionality of a traditional perforation gauge. By analyzing a scanned or photographed stamp image displayed on a dark background, the software can determine perforation measurements to the nearest ¼ (0.25) unit with high accuracy. Users can manually drag the gauge overlay across a stamp image or let the program automatically measure one or both sides of the perforation. A key strength is its tolerance for imperfect stamps — it intelligently compensates for common issues such as missing teeth, making it practical for real-world collection analysis. The tool requires users to input the image resolution (75–1200 DPI) and display scale (50–500%) to ensure accurate calculations. These settings are saved between sessions for convenience. ePerforationGauge ships with a comprehensive built-in variety database covering standard Dutch postage stamps, and users can manually add additional varieties from other countries or collections. Automatic perforation analysis completes in just a few seconds depending on image size and system speed, returning the approximated perforation value instantly. The application window can be set to remain always-on-top for easy use alongside image viewers or scanning software. Designed for Windows 98 and NT (32-bit), ePerforationGauge is a lightweight, free utility requiring only about 2 MB of disk space, making it an accessible and practical reference tool for serious stamp collectors.
Key Features
- Automatic Perforation Measurement: Automatically measures the perforation of one or both sides of a stamp image in just a few seconds, returning results to the nearest ¼ unit.
- Missing Tooth Correction: Intelligently detects and corrects for minor perforation defects such as missing teeth, improving accuracy on imperfect stamps.
- Adjustable DPI and Scale Settings: Supports resolution inputs from 75 to 1200 DPI and scale from 50% to 500%, with settings saved between sessions for convenience.
- Built-in Dutch Stamp Variety Database: Includes all standard postage stamp varieties of The Netherlands, with the option to manually add varieties from other countries.
- Always-on-Top Overlay: The gauge window can float above other applications, making it easy to use alongside image viewers or scanning software simultaneously.
Use Cases
- A stamp collector scans a Dutch postage stamp and uses ePerforationGauge to automatically identify its perforation variety from the built-in database.
- A philatelist manually drags the gauge overlay over a high-resolution stamp scan to verify horizontal and vertical perforation measurements before cataloguing.
- A dealer authenticates a potentially rare stamp variety by measuring its perforation and comparing it against known specifications in the program's database.
- A collector analyzes a stamp with a missing tooth to determine its true perforation measurement using the software's defect-correction feature.
- A philately researcher uses batch image analysis to quickly measure and document the perforations of a large collection of scanned stamps.
Pros
- Free and Lightweight: Completely free to download and use, requiring only ~2 MB of disk space with no installation complexity.
- Handles Imperfect Stamps: Missing tooth correction makes it practical for analyzing real-world stamps that are not in mint condition.
- Fast Automatic Analysis: Delivers perforation measurements in seconds without requiring manual gauge alignment in automatic mode.
Cons
- Windows Only: Designed and tested exclusively for Windows 98/NT 32-bit systems, with no support for macOS, Linux, or modern 64-bit environments.
- Very Niche Use Case: Only useful for philatelists measuring stamp perforations; has no broader application outside stamp collecting.
- Outdated Software (2004): Version 1.0 was released in January 2004 and may face compatibility issues on modern Windows operating systems.
Frequently Asked Questions
What is ePerforationGauge used for?
ePerforationGauge is used by stamp collectors (philatelists) to measure the perforation of postage stamps displayed in digital images, replacing the need for a physical perforation gauge.
Do I need to know the scan resolution to use it?
Ideally yes — knowing the DPI and display scale of your scanned stamp image ensures the most accurate perforation measurement. However, if the stamp is a known variety, the program may still identify it without this information.
Can it measure stamps from countries other than the Netherlands?
The built-in database covers Dutch postage stamps, but users can manually add varieties from other countries to extend its coverage.
How accurate is the automatic measurement?
The program measures perforation to the nearest ¼ (0.25) unit and includes logic to compensate for minor defects like missing teeth, making it quite reliable for most standard stamps.
Is ePerforationGauge free to use?
Yes, ePerforationGauge is free to download and use. It requires approximately 2 MB of disk space and runs on Windows 98/NT and compatible 32-bit Windows systems.
