A set of image portions is obtained. A pixel series that includes respective representative values of the image portions is obtained. Spectral data are obtained based on the pixel series. Significant local maxima are identified in the spectral data. An artificial light is determined to have been captured in the set of the image portions in response to determining that a number of the significant local maxima is greater than one. An anti-flicker feature of an image capture device is enabled. in response to determining that the artificial light is captured in the set of the image portions.