Errors detecting method for e.g. cast part, involves comparing values of central moments of pixel in original image by semantics/effective images, and evaluating error in testing part when values of semantics are not maintained for pixel

摘要

The method involves receiving radiographs of error-free testing parts as effective images. Central moments are calculated from the images for preset pixel in the images, where the moments are absolute deviation of gray values, standard deviation, obliqueness and kurtosis. The values of the moments are assigned to semantics, and a radiograph of a testing part to be tested is received as original image. The values of the pixel in the original image are compared by the semantics/effective images. An error in the part is evaluated when the values of the semantics are not maintained for a pixel.