An image processing device includes a reception unit and a generation unit. The reception unit receives an input image signal, and a synchronization signal used to generate an output image signal on a basis of the input image signal. The generation unit generates, in a case in which the reception unit receives an initial synchronization signal of a unit of image reading, a synchronization signal for a subsequent input image signal. The reception unit receives the synchronization signal generated by the generation unit.

An image processing device includes a reception unit that receives an input image signal, and a synchronization signal used to generate an output image signal on a basis of the input image signal. In a case in which, after receiving the synchronization signal, the reception unit does not receive a next synchronization signal within a predetermined reception period, the reception unit conducts an automatic reception process that treats the next synchronization signal as being received.

An image processing device includes a reception unit and a setting unit. The reception unit receives an input image signal, and a synchronization signal used to generate an output image signal on a basis of the input image signal. The setting unit sets, after the reception unit receives the synchronization signal, a reception prohibition period that prohibits reception of a different synchronization signal by the reception unit.