Automatic Detection of Concrete Spalling Using Piecewise Linear Stochastic Gradient Descent Logistic Regression and Image Texture Analysis

Algorithm 1

Pseudo code of the Stochastic Gradient Descent (SGD) algorithm.

Procedure SGD

Create a training dataset

Randomly create

Defining MaxEpoch // the maximum number of epochs

Defining // the learning rate parameter

For  ep = 1 to MaxEpoch

Shuffle samples in the training data set

For   = 1 to M // M = number of data samples

For   = 0 to

End For

End For

End For

Return