Abstract: The container inner surface tester extracts image information about the opening portion and the deformation of the inner surface of a test cylindrical container through an image recognizing technique, and checks the circularity of the opening portion of the container. If it is detected that the present cylindrical container indicates a major defect level higher than a minor defect level according to the check of the image inside the container, then the production line of containers is immediately stopped to minimize the occurrences of major defective containers. Furthermore, the cylindrical container inner surface tester identifies the adjacent point of cylindrical containers through calculations and logical operations according to the image information.

Abstract: A window signal generating device for use in a video scanning apparatus, for producing a window signal during selected periods when a video scanning signal is in an observation region window of interest to facilitate scanning only from objects which appear in selectively defined windows of a viewing area, comprising, an addressable memory for storing information indicating the starting and ending boundaries of each window of interest in a viewing area, a memory address driver for addressing locations in memory containing the stored boundary information for a horizontal scan line in response to a horizontal scan line signal, a counter for receiving horizontal and vertical synchronous signals and for providing a video scanning position output signal, and a comparator circuit for receiving the video scanning position output signal from the counter and the starting and ending boundary data from the memory, and for producing a window output signal when the video scanning position is within the boundaries of a wind

Abstract: An apparatus and method for detecting defects in a substrate, including the periphery of the substrate, by the use of an image pickup device which sequentially scans the substrate along each of a plurality of vertically displaced horizontal lines for equal horizontal scanning periods. The analog output of the pickup device is coded to provide a binary coded signal having a polarity determined by the amount of light reflected from the substrate at each incremental portion of the scanning periods. The binary coded signal is shifted for a first interval which is less than the horizontal scanning period to obtain a first shifted output, and then further shifted for a second interval, measured from the end of the first interval, which is equal to the horizontal scanning period to obtain a second shifted output.