Image processing apparatus capable of performing image processing immediately after starting to be supplied with an external voltage

An image processing apparatus includes a switch section, a power supply section, an operation display section, an initialization control section, an image processing section, and a condition receiving section. The initialization control section causes the operation display section to start a first initialization processing when supply of a power supply voltage is started, and subsequently causes the image processing section to start a second initialization processing. The condition receiving section accepts an input of an execution condition. The operation display section includes a display part, a storage part, a display control part, and a condition setting part. The display control part causes the display part to display a screen after completion of the first initialization processing. The condition setting part stores an execution condition inputted via the screen in the storage part, and outputs the execution condition to the condition receiving section after completion of the second initialization processing.