Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-14
Inena, Y: AUTHOR [+2]
Disclosed is a method which measures inclination direction and position of solid models and this method is applied to the measurement of the top position of the plate in a parts cage.
a method which measures inclination direction
and position of solid models and this method is applied to the
measurement of the top position of the plate in a parts cage.
models take the shape of the plates which are
placed in the parts cage at a random angle of inclination or
irregularity. The image signal is acquired by CCD camera from the
top of parts cage. The parts cage is placed on a white board. The
iris of a CCD camera is opened to bring the plate into relief.
image data is converted to binary data to eliminate
the image noise element and the image of the parts cage. Therefore,
the image of the plate is clear. Fig. 1 shows a plot chart for the
coefficient of contrast transform.
At first, the
program finds the left-top point of the plate by
scanning the 2x2 pixel window. The scan starts from the left-top
point to the left-bottom point along the left-edge point and scans to
the right direction step by step.
finds the white level of all pixels of the 2x2
pixel window in the top of the image. This point is position A in
Fig. 2. Fig. 2 shows corner positions A-E of the plate.
the program finds the corner position of the plate
by scanning the edge of the plate. The position B is found by moving
the 2x2 pixel window. The program moves 2x2 pixels from position A
to left-bottom along the edge of plate and finds positi...