Development of a CCD based system called digitrack for automatic track counting and evaluation

J. Molnár, G. Somogyi, S. Szilágyi, K. Sepsy

Research output: Contribution to journalArticle

4 Citations (Scopus)


Rather expensive and unflexible commercial systems have been reported in the literature for fully automatic counting and analyzing etched nuclear tracks. In these systems the image processing is made by a videocamera equipped with a microscope of relatively high magnification. We have developed, to best of our knowledges, the first automatic track analysis system (DIGITRACK) in which the video signals are processed by a new type of video-receiver called charged coupled device (CCD). The photosensitive semiconductor device is a 2.5 cm long line imager of type Fairchild CCD 121HC which converts one row of the picture seen through a low magnification microscope into 1728 binary signals by a thresholding logic. The picture elements are analysed by a microcomputer equipped with two INTEL 8080 microprocessors and interfaced to a PDP-11/40 computer. The microcomputer also controls the motion of the stage of microscope. For pattern recognition and analysis a software procedure is developed which is able to differentiate between overlapping tracks and to determine the number, surface opening and x-y coordinates of the tracks occurring in a given detector area. The distribution of track densities and spot areas on the detector surface can be visualized on a graphic display. The DIGITRACK system has been tested for analysis of alpha-tracks registered in CR-39 and LR-115 detectors.

Original languageEnglish
Pages (from-to)243-246
Number of pages4
JournalNuclear Tracks and Radiation Measurements (1982)
Issue number1-4
Publication statusPublished - 1984


  • CCD videoreceiver
  • automation
  • digital image
  • microprocessor control
  • nuclear track counting
  • track overlap

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Development of a CCD based system called digitrack for automatic track counting and evaluation'. Together they form a unique fingerprint.

  • Cite this