1. A method of creating a noise model comprising: determining a first noise model for a first light intensity period, wherein the first light intensity period is associated with a first exposure of a multiple-exposure high dynamic range image (“HDR image”); determining a second noise model for a second light intensity period, wherein the second light intensity period is associated with a second exposure of the HDR image; and determining a third noise model for a first transition period comprising light intensity values between the first and second light intensity periods, wherein the third noise model is based on a ratio of attributes of at least the first and second exposure.