We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Defect identification on specular machined surfaces.
- Authors
Sills, Ken; Bone, Gary; Capson, David
- Abstract
In many industrial applications, it is important to identify defects on specular surfaces. On machined surfaces, defect identification may be further complicated by the presence of marks from a machining process. These marks may dramatically and unpredictably change the appearance of the surface, while not altering its ability to function. To differentiate between surface characteristics that constitute a defect and those that do not, we propose a system that directly illuminates specular machined surfaces with a programmable array of high-power light-emitting diodes that allows the angle of the incident light to be varied over a series of images. A reflection model is used to predict the reflected intensity as a function of incident lighting angle for each point on the imaged surface. A surface defect causes the observed reflected intensity as a function of incident lighting angle to differ from that predicted by the reflection model. Such differences between the observations and the reflection model are shown to identify surface defects such as porosities, dents and scratches in the presence of marks from the machining process.
- Subjects
INDUSTRIAL applications; MACHINING; PROGRAMMABLE array logic; POROSITY; SURFACE defects; LIGHT emitting diodes
- Publication
Machine Vision & Applications, 2014, Vol 25, Issue 2, p377
- ISSN
0932-8092
- Publication type
Article
- DOI
10.1007/s00138-013-0590-1