3.2 Surface defect image processing
⑴ Image marking
A prerequisite for deep learning models to achieve better image
recognition and classification results is a large-scale dataset of
labeled training sets [16]. LabelIMG is a free,
open source graphical image annotation tool. The LabelIMG tool is used
to label the training set with the labels of pits, wears, snowflakes and
cracks. A digital image of the Si3N4 ceramic bearing inner ring surface
defects is acquired and an annotation file is output. The file comes
with an interactive drawing containing the borders of all pixels of the
Si3N4 ceramic bearing inner ring surface
defects, with bounding boxes drawn around each identified defect in the
image.