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Face Recognition Using the Diagonal Relative Gradient Method in a Low Illumination Environment.
Deng-Yuan Huang
Chun-Jih Lin
Shr-Huan Dai
Published in:
J. Inf. Hiding Multim. Signal Process. (2014)
Keyphrases
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gradient method
illumination conditions
lighting conditions
face images
convex formulation
pose variations
convergence rate
human faces
optimization methods
image features
multiscale
machine learning
image compression
facial expressions
cost function
step size
face recognition
clustering algorithm