Resumen
Procedure for evaluating the quality of batches of cork sheets, which comprises the steps of: estimating an optimal number of images (n) necessary to sample the batch, obtaining a number of sections of cork sheets equal to the optimal number, taking a image of each section of plate; classify each image as pluggable or refuged; express the quality of the lot as an estimated percentage of refuge (R); and calculate a confidence interval like: {IMAGE-01} Where R is the percentage of refuge obtained, n the optimal number of images and Z{al/2} the value of the Student's t distribution for a confidence level α and n degrees of freedom. (Machine-translation by Google Translate, not legally binding)