A media detection apparatus for detecting moisture information corresponding to a moisture amount or a moisture percentage of a sheet, the media detection apparatus including: a moisture sensor including a light emitter that emits light and a light receiver that receives the light reflected off the sheet or transmitted through the sheet; and a hardware processor that controls a temperature of the light emitter such that a wavelength of the light emitted from the light emitter becomes a predetermined wavelength.

An image forming apparatus that performs color printing by using a digital type laser driver having an automatic adjustment function of a bias current that includes a laser light emitter that emits laser light to expose a photoreceptor, a current controller that controls an APC light emission current of the laser light emitter, and a signal generator that generates a signal to cause the laser driver to calculate the bias current from a current value by a plurality of APC light emissions of the laser light emitter, wherein the signal generator generates a signal to cause the laser driver to calculate the bias current based on the current value by the plurality of APC light emissions from the laser light emitter at a timing outside a printing area in a sub-scanning direction in bias current calculation of the laser light emitter that performs exposure of a predetermined color.