When reading on the wikipedia page of Calibration they said :
" A reverse process to regression, where instead of a future dependent variable being predicted from known explanatory variables, a known observation of the dependent variables is used to predict a corresponding explanatory variable "
Indeed, this confuses me ! For me I see calibration is a special case of regression, and not a reverse regression. So, can some one explain the stated in wikipedia, or in general what is the difference between regression and calibration?