Digital image processing: A path to better pictures

Kokubo, Y.; Hardy, W. H.

doi:10.1016/0304-3991(82)90244-3

Cited by 5 publications

(1 citation statement)

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“…The availability of powerful hardware and the development of suitable software make image analysis possible even in real time [24,32]. Because of their versatility these techniques are being applied to both light and electron microscopy as tools for analysis and image enhancement [33,22,5,34,12].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous tracking of flagellates in real time by image analysis

Häder

Vogel

1991

J. Math. Biol.

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The hardware and software components are described to track many flagellates simultaneously in real time. The technique is based on on-line digitization of four frames taken at 80 ms intervals and stored in a specialized video memory. The outline and position of each organism are determined by chain coding and followed through the recorded series of images. The movement vectors of all organisms tracked are stored in the form of deviation angles from a predefined stimulus (light or gravity) direction and the distance each organism has moved in the time interval determined by the hardware clock of the computer. Subsequent programs allow one to determine circular histograms of movement directions and velocities in dependence of the movement direction. Examples of several orientation patterns are given for both photoorientation and gravitaxis in the dinoflagellate, P e r i d i n i u m gatunense.

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