发明名称
摘要 <p>The present invention relates to an apparatus and method for generating a comparison signal representing the magnitude difference between two successive video signals representing adjacent inspection points on the container. The comparison signal is generated with a magnitude representing the ratio between the two video signals. The ratio is calculated with the one of the two video signals having the larger magnitude as the denominator. A comparison signal generated in this manner is insensitive to general light variations across the container.</p>
申请公布号 GR77288(B) 申请公布日期 1984.09.11
申请号 GR19988101665 申请日期 1981.11.23
申请人 OWENS-ILLINOIS;INC. 发明人 JOHN WILLIAM JUVINALL
分类号 G01B11/24;G01B11/30;G01N21/88;G01N21/90;G01N21/93;G01N21/94;H04N1/401 主分类号 G01B11/24
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