An a priori Shading Correction Technique for Contact Imaging Devices

Digital imaging devices are increasingly used for color measurements in fields such as forensics, the food industry, and ecological and medical research. Especially concerning the skin, in the follow-up of benign or malignant lesions, it is crucial to ensure that the measured colors are accurate and...

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Bibliographic Details
Published in:IEEE transactions on image processing 2011-10, Vol.20 (10), p.2876-2885
Main Authors: Delalleau, A., Lagarde, J-M, George, J.
Format: Article
Language:English
Subjects:
Applied sciences
Calibration
Cameras
Color
Color imaging
colorimetry
Colorimetry - methods
Correlation
Detection, estimation, filtering, equalization, prediction
Devices
Diagnostic Imaging - methods
Exact sciences and technology
Filtering
Forensic engineering
Heterogeneity
Humans
Illumination
Image color analysis
Image processing
Image Processing, Computer-Assisted - methods
imaging system calibration
Information, signal and communications theory
Lighting
Linear Models
Microscopy, Video - instrumentation
Microscopy, Video - methods
Pixel
Polynomials
Shading
shading correction
Signal and communications theory
Signal processing
Signal, noise
Skin Pigmentation
Telecommunications and information theory
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Summary:Digital imaging devices are increasingly used for color measurements in fields such as forensics, the food industry, and ecological and medical research. Especially concerning the skin, in the follow-up of benign or malignant lesions, it is crucial to ensure that the measured colors are accurate and reproducible. Several color calibration methods having been presented over the last few years. However, the choice of illuminant used remains a major source of color misinterpretation, thus, much effort is being spent in trying to evaluate this a posteriori. The device presented overcomes this problem by integrating its own light source, although corrections in lighting heterogeneity are still required. In this paper, we present a lighting modelling technique used for shading correction which improves color consistency (as assessed by ΔE evaluation versus colorimeter), noise filtering, computation time, and memory consumption for this type of device.
ISSN:1057-7149
1941-0042
DOI:10.1109/TIP.2011.2142003