Move-signal Characteristics of Object and Application to Measurement

Abstract

Paper describes on a principle and results of the measurement of an object width, which is treated by way of the equivalent to a half-value width of a video signal waveform and is determined by counting from positions corresponding to the half-value of edges of the signal waveform. Most reasonable values of edge positions are obtained by counting from the characteristics of signal values detected at each relative move between a object and a television camera. In a general way, the measurement of a length or an area is performed by taking count of pixels accounting for them. This has the error of maximum one pixel in length. In our method, however, it could be confirmed to have high accuracy that the error is within about 10% of one pixel interval.