Abstract: The problem is solved by generating a gob image A by capturing, with a line scanning camera, an image of a falling gob that has been cut off at an orifice; generating an image B by binarizing the gob image A with a boundary value that turns a general part of the gob black and turns a peripheral lustrous portion and a defect of the gob white; generating an image C by binarizing the gob image A with a boundary value that turns the entire gob white and turns a background black and inverting the black and white; generating an image D by combining the image B and the image C together; setting a region located a given number of pixels inside an outer edge of the black area of the image D as an inspection region; and inspecting the inspection region of the gob image A to determine whether the gob is good.

Abstract: The present invention addresses the problem of facilitating detection of foreign objects or bubbles trapped in a gob. The problem is solved by generating a gob image A by capturing, with a line scanning camera, an image of a falling gob that has been cut off at an orifice; generating an image B by binarizing the gob image A with a boundary value that turns a general part of the gob black and turns a peripheral lustrous portion and a defect of the gob white; generating an image C by binarizing the gob image A with a boundary value that turns the entire gob white and turns a background black and inverting the black and white; generating an image D by combining the image B and the image C together; setting a region located a given number of pixels inside an outer edge of the black area of the image D as an inspection region; and inspecting the inspection region of the gob image A to determine whether the gob is good.