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A simple on-line device for scanning photographs

|January 1, 1977

Summary

A low-cost scanner, built using an x-y plotter, achieves a minimum resolution of 128x128 elements. This digital scanner can effectively distinguish up to 20 shades of gray in its imaging.

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Area of Science:

Instrumentation
Digital Imaging
Engineering

Background:

Traditional scanners can be expensive and complex.
There is a need for accessible digital imaging solutions.

Purpose of the Study:

To describe the development of an inexpensive scanner.
To evaluate the performance and resolution capabilities of the designed scanner.

Main Methods:

The scanner was constructed using a repurposed x-y plotter.
Image digitization was performed using the custom-built apparatus.

Main Results:

The scanner achieved a minimum resolution of 128 elements by 128 elements.
The system demonstrated the ability to resolve a maximum of 20 grey levels.

Conclusions:

A cost-effective digital scanner can be built from readily available components.
The developed scanner provides a viable option for applications requiring basic image digitization and grey-level differentiation.

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