PCB assurance currently relies on manual physical inspection, which is time consuming, expensive and prone to error. In this study, we propose a novel automated segmentation algorithm to detect and isolate PCB components called EC-Seg. Component segmentation and localization is a vital preprocessing step in the automation of component identification and authentication as well as the detection of logos and text markings. As test results indicate, EC-Seg is an efficient solution to automate quality assurance toolchains and also aid bill-of-material (BoM) extraction in PCBs. It also has the potential to be used as a region proposal algorithm for object detection networks and to facilitate sensor fusion involving artifact removal in PCB X-ray tomography.

Globalization and complexity of the PCB supply chain has made hardware assurance a challenging task. An automated system to extract the Bill of Materials (BoM) can save time and resources during the authentication process, however, there are numerous imaging modalities and image analysis techniques that can be used to create such a system. In this paper we review different imaging modalities and their pros and cons for automatic PCB inspection. In addition, image analysis techniques commonly used for such images are reviewed in a systematic way to provide a direction for future research in this area. Index Terms —Component Detection, PCB, Authentication, Image Analysis, Machine Learning