Image forming apparatus

An image forming apparatus comprising:

• a scanner unit which successively scans image data of each of a plurality of originals;
• a compression section which compresses the image data scanned by the scanner unit;
• a hard disk which stores the image data compressed by the compression section;
• a decompression section which decompresses the image data stored in the hard disk;
• a detection section which detects the direction of the original on the basis of the image data of a first one of the originals, which has been decompressed by the decompression section and scanned by the scanner section;
• a determination section which determines whether the image data decompressed by the decompression section is to be rotated or not, on the basis of a detection result of the detection section;
• a rotating section which rotates the image data of each original decompressed by the decompression section, when the determination section has determined that the image data decompressed by the decompression section is to be rotated;
• and
• an image forming unit which forms on an image formation medium the image data of each original, which has been rotated by the rotating section, or the image data of each original decompressed by the decompression section when the determination section has determined that the image data decompressed by the decompression section is not to be rotated.