Patent ID: 6873423

Claim:
A measure method comprising the steps of: A. forming a contrast image: a CPU (central processing unit) transforming an image from a lens set into a digital contrast image; B. selecting a suitable standard line: the CPU selecting a suitable standard line from multiple standard lines that are previously set in the CPU in accordance with the measure need; C. adjusting a worktable: an X-axis movement controller and a Y-axis movement controller being respectively adjusted to make the worktable being moved relative to an X-axis and a Y-axis of the worktable, the lens set continually collecting the image from the workpiece to make the contrast image moved relative to the selected standard line when the workpiece is moved due to a moving worktable; D. flushing the standard line with the profile of the contrast image: the CPU detecting and changing the color of the selected standard line and flushed contrast image of the workpiece when the selected standard line flushes with a first side of the contrast image of the workpiece to make the operator clearly differentiate; E. outputting the coordinate values of the X-axis and the Y-axis: the CPU reading the values from the linear scales of the X-axis and the Y-axis and sets the two linear scales to be zero when the selected standard line flushes with the first side of the contrast image of the workpiece; F. contrasting the coordinate values of the X-axis and the Y-axis: repeating step D and E, the CPU reading the values from the linear scales of the X-axis and the Y-axis again when the selected standard line flushes with a second side of the contrast image of the workpiece, and contrasts the values from the linear scales of the X-axis and the Y-axis in step D, wherein the first side and the second side of the contrast are opposite to each other; and G. outputting the measure value: the measure value shown on a display panel and recorded in the CPU after the CPU contrasting the values from the linear scales of the X-axis and the Y-axis in step D and F.