🧿 VIA Labeler: GUI Tool for Labeling Vias on PCB Images

A GUI application to help label vias on both sides of a PCB board, automatically synchronizing corresponding labels across different coordinate systems using user-defined fiducial points.

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📽 Overview

This tool was designed to support SPEA Korea(=semicondictor testing company) for test PCB board and company's old semiconductor testing machine, especially where precise alignment between front and back views is required.

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💡 Terminology

• Via: A hole in a PCB that electrically connects the front and back layers.
• Fiducial Point: A visual reference point (such as a corner or hole) used to align two images.
• Coordinate Alignment: The process of transforming image coordinates so that the front and back sides correspond correctly.

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📌 Key Features

• ✅ Fiducial Matching
  Define two reference points on both the front and back images of the PCB to align their coordinate systems accurately.

• ✅ Synchronized Via Labeling
  Click a via on the front image and automatically label the corresponding via positions across all four synchronized views:

  • Front Side (0°)
  • Front Side (180° Rotated)
  • Back Side (0°)
  • Back Side (180° Rotated)

• ✅ Label Customization

  • Adjust font size and label color.
  • Labels are automatically numbered and tracked.

• ✅ Undo and Save Options

  • Undo mislabeled points.
  • Save all labeled images in JPEG format for documentation or production.

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📂 Output Files

Each image contains the same via labels placed at their geometrically matched positions.

• A_SIDE_0_VIA.jpeg original front side
• A_SIDE_180_VIA.jpeg
• B_SIDE_0_VIA.jpeg original back side
• B_SIDE_180_VIA.jpeg