Various embodiments train a prediction model for predicting a label to be allocated to a prediction target explanatory variable set. In one embodiment, one or more sets of training data are acquired. Each of the one or more sets of training data includes at least one set of explanatory variables and a label allocated to the at least one explanatory variable set. A plurality of explanatory variable subsets is extracted from the at least one set of explanatory variables. A prediction model is trained utilizing the training data. The plurality of explanatory variable subsets is reflected on a label predicted by the prediction model to be allocated to a prediction target explanatory variable set with each of the plurality of explanatory variable subsets weighted respectively.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. An information processing apparatus for training a prediction model for predicting a label to be allocated to a prediction target explanatory variable set, the information processing apparatus comprising: an acquiring unit to acquire one or more sets of training data, each of the one or more sets of training data comprising at least one set of explanatory variables and a label allocated to the at least one explanatory variable set; an extracting unit to extract a plurality of explanatory variable subsets from the at least one set of explanatory variables; and a training processing unit to train a prediction model, where the prediction model is trained utilizing the training data where the plurality of explanatory variable subsets is reflected on a label predicted by the prediction model to be allocated to a prediction target explanatory variable set with each of the plurality of explanatory variable subsets weighted respectively. 2. The information processing apparatus according to claim 1, wherein respective labels comprise respective maintenance index control (MCI) labels for road conditions of respective portions of road, wherein respective MCI labels are associated with a crack ratio, a rutting amount, and an unevenness amount of a road surface; wherein the acquiring unit is further configured to acquire a prediction target data set comprising a prediction target explanatory variable set, wherein the prediction target data set comprises image data photographed by a drive recorder mounted on a passenger vehicle, acceleration data measured by an acceleration sensor mounted on the passenger vehicle, and position data measured by a global positioning system (GPS) unit attached to the passenger vehicle; wherein training the prediction model further comprises allocating a different weight coefficient to each of the plurality of explanatory variable subsets; wherein the extracting unit extracts at least luminance information and gradient information for at least a portion of the plurality of explanatory variable subsets from the at least one set of explanatory variables; the information processing apparatus further comprising a feature vector generating unit to generate a feature vector comprising a plurality of feature values concerning each of the plurality of explanatory variable subsets; the training processing unit further configured to train the prediction model by: utilizing a regression vector comprising a plurality of regression coefficients respectively corresponding to the plurality of feature values of the feature vector and the weight coefficient of each of plurality of explanatory variable subsets; executing Bayesian inference using prior distributions of the regression vector, the weight coefficients, and the training data; utilizing an objective function to be minimized for training the prediction model, the objective function comprising a weighted sum of terms indicating errors between labels predicted for the plurality of explanatory variable subsets based on the feature vector and the regression vector, and the label allocated to the at least one explanatory variable set; and outputting a posterior probability distribution of the regression vector and the weight coefficients as a training result; wherein the information processing apparatus further comprises a predicting unit to predict a MCI label corresponding to the prediction target explanatory variable set based on the prediction model, wherein the predicting unit displays the MCI label to a display screen of the information processing apparatus.