| 摘要 |
PURPOSE:To enable a stable visual inspection to be achieved without the accuracy of judging the adequacy of product being affected by inducers by sequentially updating the reference data on the basis of the measured data of a product to be inspected which is judged as acceptive. CONSTITUTION:The initial reference data A of the images taken from products W-Wn to be inspected which are fed into an inspection station are set in advance. The data A and the measured data A1-An of the products W-Wn, respectively, are compared with each other and whether the products W-Wn are acceptive is judged. The data A are corrected B on the basis of the data A1-An judged to be acceptive. Reference data B thus corrected and the measured data A1-An of the products to be inspected are compared with each other and whether the products being inspected are acceptive or rejective is judged. Further, the data B are sequentially updated at least on the basis of the measured data of the products to be inspected that are judged as rejective. Thus, generated factors can be absorbed by making the data B follow up the generation of the factors that bring about the judgment of the acceptives or rejectives and a stable visual inspection can be performed without being affected by the generation of factors inducing the incorrect judgment on acceptives or rejectives.
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