1 August 1997 Method for evaluation of imaging in automated visual web inspection
Author Affiliations +
Optical Engineering, 36(8), (1997). doi:10.1117/1.601439
The quality of the image is crucial for the performance of a visual surface inspection system. The final image quality is affected by the properties of the imaging unit. In order to evaluate the quality of the imaging unit a designer should be able to characterize the imaging performance using quantitative figures of merit. The suitability of the modulation transfer function (MTF) for the figure of merit of imaging in visual web inspection is discussed. A straightforward setup for the determination of the system MTF is suggested. Three exemplary cases are analyzed: (1) the performance of an imaging system as a function of the system f number, (2) the performance of an imaging system against the depth-of-field requirement, and (3) the performance of a TDI imager against speed mismatching. In order to relate the system MTFs to image quality, a set of defective samples from a paper manufacturing process was collected and imaged. Quantitative image quality criteria are proposed, and the sample images are analyzed according to these criteria. The final image quality is compared with the corresponding system MTF values.
Jyrki Laitinen, Ilkka Moring, "Method for evaluation of imaging in automated visual web inspection," Optical Engineering 36(8), (1 August 1997). http://dx.doi.org/10.1117/1.601439

Imaging systems

Modulation transfer functions


Image quality


Optical inspection

CCD image sensors


High-speed direct modulation of semiconductor lasers
Proceedings of SPIE (December 04 2002)
Diamond-based protective layer for optical biosensors
Proceedings of SPIE (September 26 2016)
Creases and edge analysis
Proceedings of SPIE (August 14 2001)
Is there a best classifier?
Proceedings of SPIE (October 18 2005)

Back to Top