High-performance camera module for fast quality inspection in industrial printing applications

Johannes Fürtler; Ernst Bodenstorfer; Konrad J. Mayer; Jörg Brodersen; Dorothea Heiss; Harald Penz; Christian Eckel; Klaus Gravogl; Herbert Nachtnebel

doi:10.1117/12.704542

17 February 2007 High-performance camera module for fast quality inspection in industrial printing applications

Johannes Fürtler, Ernst Bodenstorfer, Konrad J. Mayer, Jörg Brodersen, Dorothea Heiss, Harald Penz, Christian Eckel, Klaus Gravogl, Herbert Nachtnebel

Author Affiliations +

Proceedings Volume 6503, Machine Vision Applications in Industrial Inspection XV; 65030J (2007) https://doi.org/10.1117/12.704542
Event: Electronic Imaging 2007, 2007, San Jose, CA, United States

Abstract

Today, printing products which must meet highest quality standards, e.g., banknotes, stamps, or vouchers, are automatically checked by optical inspection systems. Typically, the examination of fine details of the print or security features demands images taken from various perspectives, with different spectral sensitivity (visible, infrared, ultraviolet), and with high resolution. Consequently, the inspection system is equipped with several cameras and has to cope with an enormous data rate to be processed in real-time. Hence, it is desirable to move image processing tasks into the camera to reduce the amount of data which has to be transferred to the (central) image processing system. The idea is to transfer relevant information only, i.e., features of the image instead of the raw image data from the sensor. These features are then further processed. In this paper a color line-scan camera for line rates up to 100 kHz is presented. The camera is based on a commercial CMOS (complementary metal oxide semiconductor) area image sensor and a field programmable gate array (FPGA). It implements extraction of image features which are well suited to detect print flaws like blotches of ink, color smears, splashes, spots and scratches. The camera design and several image processing methods implemented on the FPGA are described, including flat field correction, compensation of geometric distortions, color transformation, as well as decimation and neighborhood operations.

Citation Download Citation

Johannes Fürtler, Ernst Bodenstorfer, Konrad J. Mayer, Jörg Brodersen, Dorothea Heiss, Harald Penz, Christian Eckel, Klaus Gravogl, and Herbert Nachtnebel "High-performance camera module for fast quality inspection in industrial printing applications", Proc. SPIE 6503, Machine Vision Applications in Industrial Inspection XV, 65030J (17 February 2007); https://doi.org/10.1117/12.704542

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available