Abstract: An image processing device includes: a fold unit that folds a first adjustment sheet including an adjustment pattern, over the adjustment pattern based on a predetermined reference fold position; an image reader that reads an image of the adjustment pattern with the first adjustment sheet folded by the fold unit unfolded; a position identifying unit that, based on a fold line in the image of the adjustment pattern read by the image reader, identifies a position of the fold line; and a position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line identified by the position identifying unit and the reference fold position. The image reader includes a scanner that scans the first adjustment sheet relatively in a direction along fold of the first adjustment sheet, and reads the image of the adjustment pattern.

Abstract: An image forming device includes: a post processor that performs post processing for folding or forming crease on an adjustment sheet including a reference mark and an adjustment pattern filled in with black, across the adjustment pattern based on a predetermined reference position; an image reader that reads an image of the adjustment sheet under a condition that an orientation of the adjustment sheet is changed according to the post processing type or characteristics of the adjustment sheet which is placed on the platen so that the reference mark is in a predetermined direction; a position identifying unit that identifies a fold line or crease position based on the fold line or crease that appears in the adjustment sheet; and a position adjusting unit that adjusts a fold or crease position of the post processor based on a difference between the fold or crease position and the reference position.

Abstract: An image forming device includes: a fold unit that folds an adjustment sheet in which a first adjustment pattern including at least one line segment, and a second adjustment pattern filled in with black are formed, based on a predetermined reference fold position to across the first and second adjustment patterns; an image reader that reads an image of the first adjustment pattern and an image of the second adjustment pattern of the adjustment sheet with the adjustment sheet unfolded; a position identifying unit that identifies a position of a fold line based on distortion of the line segment on the image of the first adjustment pattern, or a fold line on the image of the second adjustment pattern; and a position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line and the reference fold position.

Abstract: An image processing device includes: a fold unit that folds an adjustment sheet, in which an adjustment pattern including at least one line segment is formed, over the at least one line segment based on a predetermined reference fold position; an image reader that reads an image of the adjustment pattern of the adjustment sheet with the adjustment sheet folded by the fold unit unfolded; a position identifying unit that identifies, as a position of a fold line, a position of distortion of the at least one line segment or a predetermined position of an area which appears in the image of the adjustment pattern read by the image reader; and a fold position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line identified by the position identifying unit and the reference fold position.

Abstract: An image processing device includes: a fold unit that folds an adjustment sheet, in which an adjustment pattern is formed, over the adjustment pattern based on a predetermined reference fold position; an image reader that reads an image of the adjustment pattern of the adjustment sheet with the adjustment sheet folded by the fold unit unfolded; a position identifying unit that, based on a fold line which appears in the image of the adjustment pattern read by the image reader, identifies a position of the fold line; and a fold position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line identified by the position identifying unit and the reference fold position.

Abstract: An image forming device includes: a post processor that performs post processing for folding or forming crease on an adjustment sheet including a reference mark and an adjustment pattern filled in with black, across the adjustment pattern based on a predetermined reference position; an image reader that reads an image of the adjustment sheet under a condition that an orientation of the adjustment sheet is changed according to the post processing type or characteristics of the adjustment sheet which is placed on the platen so that the reference mark is in a predetermined direction; a position identifying unit that identifies a fold line or crease position based on the fold line or crease that appears in the adjustment sheet; and a position adjusting unit that adjusts a fold or crease position of the post processor based on a difference between the fold or crease position and the reference position.

Abstract: An image forming device includes: a fold unit that folds an adjustment sheet in which a first adjustment pattern including at least one line segment, and a second adjustment pattern filled in with black are formed, based on a predetermined reference fold position to across the first and second adjustment patterns; an image reader that reads an image of the first adjustment pattern and an image of the second adjustment pattern of the adjustment sheet with the adjustment sheet unfolded; a position identifying unit that identifies a position of a fold line based on distortion of the line segment on the image of the first adjustment pattern, or a fold line on the image of the second adjustment pattern; and a position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line and the reference fold position.

Abstract: An image processing device includes: a fold unit that folds an adjustment sheet, in which an adjustment pattern is formed, over the adjustment pattern based on a predetermined reference fold position; an image reader that reads an image of the adjustment pattern of the adjustment sheet with the adjustment sheet folded by the fold unit unfolded; a position identifying unit that, based on a fold line which appears in the image of the adjustment pattern read by the image reader, identifies a position of the fold line; and a fold position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line identified by the position identifying unit and the reference fold position.

Abstract: An image processing device includes: a fold unit that folds a first adjustment sheet including an adjustment pattern, over the adjustment pattern based on a predetermined reference fold position; an image reader that reads an image of the adjustment pattern with the first adjustment sheet folded by the fold unit unfolded; a position identifying unit that, based on a fold line in the image of the adjustment pattern read by the image reader, identifies a position of the fold line; and a position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line identified by the position identifying unit and the reference fold position. The image reader includes a scanner that scans the first adjustment sheet relatively in a direction along fold of the first adjustment sheet, and reads the image of the adjustment pattern.

Abstract: An image processing device includes: a fold unit that folds an adjustment sheet, in which an adjustment pattern including at least one line segment is formed, over the at least one line segment based on a predetermined reference fold position; an image reader that reads an image of the adjustment pattern of the adjustment sheet with the adjustment sheet folded by the fold unit unfolded; a position identifying unit that identifies, as a position of a fold line, a position of distortion of the at least one line segment or a predetermined position of an area which appears in the image of the adjustment pattern read by the image reader; and a fold position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line identified by the position identifying unit and the reference fold position.

Abstract: An image forming apparatus includes an image forming unit; a sending unit that sends an original formed by the image forming unit; a reading unit that reads an image of the original that is sent by the sending unit; a detecting unit that, from the image read by the reading unit, detects an end portion detecting image formed at a predetermined position of the original; and a determining unit that determines a search region for searching for an end portion of the original included in the image by recognizing the position of the end portion detecting image detected by the detecting unit.

Abstract: An image forming apparatus includes an image forming unit that forms an image on a recording medium, a storage unit that stores information on a characteristic of a preformed image on a recording medium, and a correcting device that corrects, when an additional image is to be formed on the recording medium having the preformed image, magnification of the additional image in a subscanning direction in accordance with the information stored in the storage unit.

Abstract: Provided is an image forming apparatus, including an image forming unit that forms a test image for correction of a position of an image on the recording medium, a reading unit that reads an image from the recording medium on which the test image is formed, a transport unit that transports the recording medium, and a correction unit that corrects the position of the image, wherein the test image includes a first mark that is provided at a distance determined from the first reference line, a second mark that is provided at the distance from a second reference line set with respect to a second side, and a code image that is provided at a position determined with respect to the first mark and the second mark, and that indicates information for correction of the position of the image by the correction unit.

Abstract: An image forming apparatus includes an image forming unit; a sending unit that sends an original formed by the image forming unit; a reading unit that reads an image of the original that is sent by the sending unit; a detecting unit that, from the image read by the reading unit, detects an end portion detecting image formed at a predetermined position of the original; and a determining unit that determines a search region for searching for an end portion of the original included in the image by recognizing the position of the end portion detecting image detected by the detecting unit.

Abstract: Provided is an image forming apparatus, including an image forming unit that forms a test image for correction of a position of an image on the recording medium, a reading unit that reads an image from the recording medium on which the test image is formed, a transport unit that transports the recording medium, and a correction unit that corrects the position of the image, wherein the test image includes a first mark that is provided at a distance determined from the first reference line, a second mark that is provided at the distance from a second reference line set with respect to a second side, and a code image that is provided at a position determined with respect to the first mark and the second mark, and that indicates information for correction of the position of the image by the correction unit.

Abstract: There is provided a document, wherein a measurement image for measuring a position of an image relative to a document is formed on a first surface thereof, a designation image for designating a document position, at which the document is placed on an image reading apparatus that reads an image, is formed on a second surface thereof, and wherein the document is spaced from an end portion of a reading region of the image reading apparatus by placing the document in accordance with the designation of the designation image, and the designation image is formed such that the measurement image is placed in the reading region of the image reading apparatus.

Abstract: An image forming apparatus includes an image reading section that reads an image on paper to generate image data, and an image forming section that forms on paper an image based on image data. The image forming section forms on paper a dimension correction image including marks. The image forming section includes a computation unit that performs computation using dimension correction image data, obtained by reading the dimension correction image, to generate dimension correction data, and a memory that stores the dimension correction data. The image forming section corrects image data using the stored dimension correction data and forms an image based on the corrected image data. The computation unit has a first computation mode of generating first dimension correction data based on distances between the marks and a second computation mode of generating second dimension correction data based on distances between edges of paper and the marks.

Abstract: An image forming apparatus includes a document reading section and an image forming section. The document reading section reads a document image placed on a paper placement table and generates image data. The image forming section forms an image on a sheet of paper on the basis of the image data, and includes a memory that stores test data representing a test image, which is to be formed on a sheet of paper having a size larger than the size of the table, a correction-amount calculation unit that calculates correction amounts on the basis of image data representing the test image which is formed on the sheet of paper and which has been read by repeating an operation, and a correction-amount memory that stores the correction amounts. The image forming section forms, on a sheet of paper, an image corrected on the basis of the correction amounts.

Abstract: An image forming apparatus includes a document reading section and an image forming section. The document reading section reads a document image placed on a paper placement table and generates image data. The image forming section forms an image on a sheet of paper on the basis of the image data, and includes a memory that stores test data representing a test image, which is to be formed on a sheet of paper having a size larger than the size of the table, a correction-amount calculation unit that calculates correction amounts on the basis of image data representing the test image which is formed on the sheet of paper and which has been read by repeating an operation, and a correction-amount memory that stores the correction amounts. The image forming section forms, on a sheet of paper, an image corrected on the basis of the correction amounts.

Abstract: There is provided a document, wherein a measurement image for measuring a position of an image relative to a document is formed on a first surface thereof, a designation image for designating a document position, at which the document is placed on an image reading apparatus that reads an image, is formed on a second surface thereof, and wherein the document is spaced from an end portion of a reading region of the image reading apparatus by placing the document in accordance with the designation of the designation image, and the designation image is formed such that the measurement image is placed in the reading region of the image reading apparatus.