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SMTnet Express August 8, 2013, Subscribers: 26202, Members: Companies: 13446, Users: 35028

Technical Library

Automatic PCB Defect Detection Using Image Substraction Method

by Sonal Kaushik, Javed Ashraf; Al-Falah School of Engineering & Technology

A printed circuit board, or (PCB) is used to mechanically support and electrically connect electronic components using conductive pathways, track or signal traces etched from copper sheets laminated onto anon conductive substrate. The automatic inspection of PCBs serves a purpose which is traditional in computer technology. The purpose is to relieve human inspectors of the tedious and inefficient task of looking for those defects in PCBs which could lead to electric failure.

In this project Machine Vision PCB Inspection System is applied at the first step of manufacturing, i.e., the making of bare PCB. We first compare a PCB standard image with a PCB image, using a simple subtraction algorithm that can highlight the main problem-regions. We have also seen the effect of noise in a PCB image that at what level this method is suitable to detect the faulty image. Our focus is to detect defects on printed circuit boards & to see the effect of noise. Typical defects that can be detected are over etchings (opens), under-etchings (shorts), holes etc...

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Forum search results for related keywords: machine vision, defects, PCB Inspection

SMT / PCB Products

BGA Rework Station
FINEPLACER� coreplus BGA rework station

The perfect blend of performance and cost...

by: Finetech

PCB Cleaning Agent
HYDRON WS 325 Cleaning and Defluxing Agent

For cleaning water soluble flux residues...


ProntoPLACE SMT, Thru-hole Software
Unisoft ProntoPLACE SMT, Thru-hole Software

Any CAD/CAE to any SMT & THT Machine...

by: Unisoft

LF-4300 & 4300
Solder Pastes
SP700avi Inline Stencil Printer

Is there anything these solder pastes can't do?


MS-11 Series
In-Line AOI Machine
MS-11 Series AOI

High Speed Precision In-Line SPI System...

by: Mirtec Get Your Power Membership

MPM Momentum
Stencil Printer
MPM Momentum Series Stencil Printers

A highly reliable printing system...

by: Speedline

EXCEN High Speed
Modular Mounter
EXCEN High Speed Modular Mounter

World's highest area productivity...


Mark5 Series -
Reflow System
The Mark III Reflow System

Up to 40% reduction in nitrogen consumption...

by: Heller

SMT / PCB Equipment Auctions

X-Line - SMT Equipment Auctions

Late Model SMT and Thru Hole Equipment

August 12-13 | by: X-Line Asset Management

Electronic Equipment Mart

Ekra X4
Screen Printer
Ekra X4 Screen Printer

IBE SMT Equipment

all marketplace listings

Camalot 5000
Adhesive Dispenser
Camalot 5000 Adhesive Dispenser


all marketplace listings

MVP 850G 3D


all marketplace listings

Assembleon Topaz Xi
Pick and Place...
Assembleon Topaz Xi Flex Placer

CE Exchange

all marketplace listings

Events Calendar

August 27-29

Surface Cleanliness Assessment - Free Online Webinar
August 15

Career Center


SMT Programmer

Austin, TX, USA | Adecco Engineering & Technical

SMT Process Engineer

San Jose, CA, USA | Gilbert Consulting Services, Inc.

Senior SMA Process Engineer

Lynchburg, VA, USA | AMTI Advanced Manufacturing


Customer Service Engineer

Suzhou, China

SMT Engineer

Chennai, India

Accounting & Payroll Administrator

Surrey, BC, Canada

Industry Associations Events


SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies. Membership Info | SMTA Certification | Bookstore

Next Event: Free Webinar: Cleaning a No-Clean Flux and Related Reliability Issues - August 13


IPC - Association Connecting Electronics Industries is a US-based trade association dedicated to the competitive excellence and financial success of its nearly 2,600 member companies which represent all facets of the electronic interconnection industry, including design, printed wiring board manufacturing and electronics assembly. Membership Info | Training & Certification Programs | Standards & Publications - Online Store

Next Event: IPC APEX India - August 27 - 29

Technical Editor - Davef (submit your technical articles)

Newsletter Editor - Anna Girouard, 98 Elm Street, Portland, Maine 04101 USA, Tel.207-780-0887.

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Capital Equipment Exchange - Used PCB Assembly Equipment

SMTAI 2013

NextJet Fluid Dispensing - Asymtek

Europe's No. 1 source for pre-owned SMT equipment - AdoptSMT

Aquanox A4638 water soluble flux cleaner - Kyzen

Used SMT Equipment - IBE

Used PCB Assembly Equipment - PPM

Mark5 SMT Reflow Oven - Heller

FINEPLACER� coreplus BGA rework station - Finetech

ii-Feed tape feeding solution for Europlacer machines

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