| 摘要 |
FIELD: physics.SUBSTANCE: disclosed is an apparatus for determining outlines of objects on an image. The apparatus comprises an image element sensor and the following units for: generating threshold values of speed and acceleration of change in intensity of the image elements, creating an eight-connected neighbourhood of the image elements, successive selection of triads in the eight-connected neighbourhood of an image element, memory for said triads, differentiating triads and a decision unit. The unit for generating threshold values of speed and acceleration of change in intensity of the image elements is connected to the output of the image element sensor. The unit for creating an eight-connected neighbourhood of the image elements is connected to the output of the unit for generating image elements and is connected to series-connected unit for successive selection of triads in the eight-connected neighbourhood of an image element, memory unit for triads of the eight-connected neighbourhood of an image element, triad differentiation unit and decision unit.EFFECT: high noise-immunity of recognising an image outline by estimating the speed and acceleration of change of colour intensity in the eight-connected neighbourhood of an image element.7 dwg |
