1. An image processing apparatus comprising: an acquiring unit configured to acquire a page image; an extracting unit configured to extract area information from the page image acquired by the acquiring unit, the area information including information on existence or absence of a text area and a picture area; a calculating unit configured to divide the page image into a plurality of blocks and calculate an image feature amount of each of the divided blocks; and a determining unit configured to determine, on the basis of the area information extracted by the extracting unit and the image feature amount of each of the divided blocks calculated by the calculating unit, whether the page image includes the picture area.