Patent Number: 8,797,618

Title: Image processing apparatus for determining whether a document is color or monochrome

Abstract: Provided is an image processing apparatus that improves the accuracy in ACS determination without needing a mechanism to detect an original document size, a user input of an original document size, or pre-scanning of an original document, and a control method therefor. To accomplish this, the image processing apparatus specifies, when reading an original document, the size of the original document, based on the timings at which the leading edge and the trailing edge of the original document that is conveyed were detected. Furthermore, the image processing apparatus determines whether image data read from the original document is a color image or a monochrome image, for each size of a plurality of standard-size printing medium, and selects, from among the determination results, a determination result obtained by performing determination using the standard-size printing medium size that is similar to the specified size of the original document.

Inventors: Onishi; Tetsuya (Kamakura, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: H04N 1/60 (20060101)

Expiration Date: 8/05/12018