Problem to be solved: to provide an image forming apparatus, an image forming system, an image forming method, and a control program capable of correcting the image of the conveyed original document.Image forming apparatus 100 includesImaging unit 115A transport part 112 for moving the document to an imaging part113117118 andThe first input image is generated by the image pickup section while moving the document from the upper end to the lower end by the conveying section.AndA control section 151 for generating a second input image by an imaging section while moving the document from the lower end to the upper end by a conveying sectionA corrected image generating section 153 for generating a corrected image obtained by correcting one of the first or second input images using the other imageAn output part 131 for outputting a corrected image andAndThe corrected image generation sectionBy utilizing the fact that the position of the original plane to be imaged when the document is in contact or away from the conveying portion varies in the first and second input imagesA corrected image is generated.Diagram
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