Image processing apparatus and image processing method

An image processing apparatus comprising:

• a scanning section configured to read a manuscript;
• a determination section configured to use a color determination threshold and a monochrome determination threshold to determine whether the manuscript is a color manuscript or a monochrome manuscript, the monochrome determination threshold being different from the color determination threshold;
• a storage section configured to store the color determination threshold and the monochrome determination threshold;
• and
• an adjustment section configured to adjust the color determination threshold and the monochrome determination threshold, wherein
• the determination section is configured to accept a determination instruction from a user, upon determining that a color level of the manuscript is within a threshold interval region between the color determination threshold and the monochrome determination threshold, both inclusive,
• the adjustment section is configured to adjust the color determination threshold or the monochrome determination threshold, based on the determination instruction, and
• the adjustment section is configured to change the color determination threshold and the monochrome determination threshold to a color/monochrome determination threshold, when a difference between the color determination threshold and the monochrome determination threshold is less than or equal to a predetermined value.