Patent ID: 7058323

Claim:
An image forming apparatus provided with an image forming part for forming document images on a recording medium, and a fixing part for fixing the images formed on the recording medium to the recording medium, wherein the apparatus comprising: a first measuring part which is downstream of the fixing part in a transport path for the recording medium, measures speckles in the recording medium transported, and generates a measured speckle data representing the measured speckles; a memory part for storing the measured speckle data generated by the first measuring part with a standard speckle data representing speckles on the recording medium that has not undergone the fixing part; a second measuring part which is upstream of the image forming part in a transport path for the recording medium, and measures speckles on the recording medium transported; and a correction part which applies corrections to the document images formed on the recording medium in order to compensate for the lengthening of the recording medium formed by the fixing part in a case where among the speckle data stored in the memory part, the standard speckle data is the most analogous to the speckles measured by the second measuring part; and, does not apply corrections to the document images formed on the recording medium in order to compensate for the lengthening of the recording medium formed by the fixing part in a case where, among the speckle data, stored in the memory part, the measured speckle data is the most analogous to the speckles measured by the second measuring part.