Paper
17 January 2006 Robust detection of defects in imaging arrays
Jozsef Dudas, Cory Jung, Glenn H. Chapman, Zahava Koren, Israel Koren
Author Affiliations +
Proceedings Volume 6059, Image Quality and System Performance III; 60590X (2006) https://doi.org/10.1117/12.643452
Event: Electronic Imaging 2006, 2006, San Jose, California, United States
Abstract
As digital imagers continue to increase in size and pixel density, the detection of faults in the field becomes critical to delivering high quality output. Traditional schemes for defect detection utilize specialized hardware at the time of manufacture and are impractical for use in the field, while previously proposed software-based approaches tend to lead to quality-degrading false positive diagnoses. This paper presents an algorithm that utilizes statistical information extracted from a sequence of normally captured images to identify the location and type of defective pixels. Building on previous research, this algorithm utilizes data local to each pixel and Bayesian statistics to more accurately infer the likelihood of each defect, which successfully improves the detection time. Several defect types are considered, including pixels with one-half of the typical sensitivity and permanently stuck pixels. Monte Carlo simulations have shown that for defect densities of up to 0.5%, 50 ordinary images are sufficient to accurately identify all faults without falsely diagnosing good pixels as faulty. Testing also indicates that the algorithm can be extended to higher resolution imagers and to those with noisy stuck pixels, with only minimal cost to performance.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jozsef Dudas, Cory Jung, Glenn H. Chapman, Zahava Koren, and Israel Koren "Robust detection of defects in imaging arrays", Proc. SPIE 6059, Image Quality and System Performance III, 60590X (17 January 2006); https://doi.org/10.1117/12.643452
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Cited by 14 scholarly publications.
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KEYWORDS
Imaging systems

Sensors

Error analysis

Calibration

Defect detection

Image processing

Imaging arrays

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