An image processing apparatus includes an image output apparatus and an image reading apparatus. The image output apparatus includes a writing tool information receiving unit that receives writing tool information, an information image generating unit that generates an information image, a combining unit that combines the information image with an input field in a document, and a first output unit that outputs the document onto a medium. The image reading apparatus includes a writing tool information memory that stores writing tool information, a reading unit that reads an information image that has been output onto a medium by the image output apparatus and that is used for extracting a writing position, an extracting unit that analyzes the information image, thereby extracting writing tool information, and a determining unit that determines whether or not the writing tool is suitable as a writing tool for performing writing.