Implementation in Hardware and Its Evaluation of Dual Lines Scanning Method : Perimeter Measurement by Dual Lines Scanning Method (Second Report)

Abstract

The development of the high-speed algorithm, using dual lines scanning, called DLS, of perimeter measurement for the figures of binary image was described in the previous report. And also it was proved theoretically that the accuracy of the measurement with that algorithm increases by employing rectangular pixel of large vertical-horizontal ratio in the same report.At this time, the algorithm is implemented in the simple hardware and the measuring characteristics is evaluated for various shape of figures. The experimental results closely agree with the estimation by the computer simulation made beforehand.There are two ways for realizing rectangular pixel with large vertical-horizontal ratio in the present raster scanning video system, they are to increase the horizontal or to decrease the vertical resolution respectively. It is confirmed experimentally that the accuracy of measurement is improved even in latter case, in which the total resolution is decreased.As the results of experimental investigation, it can be substantiated that the DLS algorithm is practically effective for the perimeter measurement of figures.