| 摘要 |
In a method or an apparatus for adequately securing a predetermined distance of a spark discharge gap of a spark plug by means of an image data processing, the image data taken by a camera are processed in a manner that a measurement is made on the image data along each of a plurality of measurement lines nearly parallel to each other connecting the center and ground electrodes so as to cover an entire range of a width length of the center electrode in order to obtain a plurality of values of the distance of the spark discharge gap along the measurement lines.
|
