@CONFERENCE\{IMM2012-06281,
    author       = "S. Sharifzadeh and J. L. Skytte and O. H. A. Nielsen and B. K. Ersb{\o}ll and L. H. Clemmensen",
    title        = "{REGRESSION} {AND} {SPARSE} {REGRESSION} {METHODS} {FOR} {VISCOSITY} {ESTIMATION} {OF} {ACID} {MILK} {FROM} {IT}’S {SLS} {FEATURES}",
    year         = "2012",
    month        = "apr",
    keywords     = "Regression, Sparse Regression, Smoothing, Sub-Surface Laser Scattering (SLS)",
    booktitle    = "19th International Conference on Systems, Signals and Image Processing, Vienna, Austria",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "Vienna-Austria",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/6281-full.html",
    abstract     = "Statistical solutions find wide spread use in food and medicine
quality control. We investigate the effect of different regression
and sparse regression methods for a viscosity estimation
problem using the spectro-temporal features from new Sub-
Surface Laser Scattering (SLS) vision system. From this investigation,
we propose the optimal solution for regression
estimation in case of noisy and inconsistent optical measurements,
which is the case in many practical measurement systems.
The principal component regression (PLS), partial least
squares (PCR) and least angle regression (LAR) methods are
compared with sparse {LAR,} lasso and Elastic Net (EN) sparse
regression methods. Due to the inconsistent measurement
condition, Locally Weighted Scatter plot Smoothing (Loess)
has been employed to alleviate the undesired variation in the
estimated viscosity. The experimental results of applying different
methods show that, the sparse regression lasso outperforms
other methods. In addition, the use of local smoothing
has improved the results considerably for all regression methods.
Due to the sparsity of lasso, this result would assist to
design a simpler vision system with less spectral bands."
}