Regarding an image forming apparatus for printing an input image and including a print head having a head sensor configured to sense information from the input image printed on a print medium, there is a method of determining a head sensor position parameter in the image forming apparatus. The method includes printing a first swath of the input image on the print medium and determining the head sensor position parameter by performing a sub-method. The sub-method includes capturing, via the head sensor, a target image from the printed first swath, comparing the target image to a reference image for the first swath based upon the input image, and determining the head sensor position parameter based on a relative shift between the target image and the reference image.

Regarding an image forming apparatus for printing an input image and including a print head having a head sensor configured to sense information from the input image printed on a print medium, there is a method of determining a head sensor position parameter in the image forming apparatus. The method includes printing a first swath of the input image on the print medium and determining the head sensor position parameter by performing a sub-method. The sub-method includes capturing, via the head sensor, a target image from the printed first swath, comparing the target image to a reference image for the first swath based upon the input image, and determining the head sensor position parameter based on a relative shift between the target image and the reference image.

An image forming apparatus includes an image forming unit, a display, a reading unit configured to read a reference image formed on a test sheet by the image forming unit, wherein the reference image includes a mark corresponding to a reading order, a controller configured to control the image forming unit to form the reference image, cause the reading unit to execute a first reading operation, determine whether first read data is obtained, inform of a reading error if the first read data is not obtained in the first reading operation, cause the reading unit to execute a second reading operation, determine whether second read data is obtained, and inform of a reading error if the second read data is not obtained in the second reading operation, and an adjustment unit configured to adjust image forming positions based on the first read data and the second read data.

Disclosed is a method of determining line feed error in an image forming apparatus for printing an image, said image forming apparatus comprising a print head having a head sensor configured to sense information from the image printed on a print medium, said method comprising the steps of printing a first swath of the image on the print medium, repositioning the print head relative to the print medium by at least one line feed distance, determining a line feed error based upon information sensed from the printed first swath by the head sensor, and printing, using the determined line feed error, a second swath of the halftone image on the print medium.

Disclosed is a method of determining line feed error in an image forming apparatus for printing an image, said image forming apparatus comprising a print head having a head sensor configured to sense information from the image printed on a print medium, said method comprising the steps of printing a first swath of the image on the print medium, repositioning the print head relative to the print medium by at least one line feed distance, determining a line feed error based upon information sensed from the printed first swath by the head sensor, and printing, using the determined line feed error, a second swath of the halftone image on the print medium.

In an image processing apparatus, a specific local gradation pattern detecting unit detects a specific local gradation pattern in a density distribution of a pixel array in a secondary scanning direction at each one of plural sampling positions along a primary scanning direction in a document image. A crease detecting unit detects a crease on the basis of positions in the primary scanning direction and positions in the secondary scanning direction of plural specific local gradation patterns detected for the plural sampling positions along the primary scanning direction. A crease removing unit removes the detected crease. The specific local gradation pattern has a density distribution that monotonically increases from a background density to a local peak density and monotonically decreases from the local peak density to the background density in the secondary scanning direction.

An image forming system includes: an image forming portion that forms an image on a paper; an image scanning portion that scans the image formed on the paper; and a processor that controls the image forming portion based on a scanned image obtained through scanning of the image scanning portion, in which the processor is configured to: specify, based on a first scanned image that is corresponding to a first image formed on a first paper by the image forming portion and that is obtained through scanning of the image scanning portion, a first deviation amount representing a magnitude of a deviation of the first image with respect to the first paper; specify a first correction amount for deviation correction applied when the first image is formed, based on first management information included in the first scanned image; calculate a second correction amount based on the first deviation amount and the first correction amount; embed second management information representing the second correction amount in a second image; and correct a position where the second image is formed on a second paper, according to the second correction amount.

Systems and methods of the present disclosure relate generally to facilitate performing a task on a surface such as woodworking or printing. More specifically, in some embodiments, the present disclosure relates to mapping the surface of the material and determining the precise location of a tool in reference to the surface of a material. Some embodiments relate to obtaining and relating a design with the map of the material or displaying the current position of the tool on a display device. In some embodiments, the present disclosure facilitates adjusting, moving or auto-correcting the tool along a predetermined path such as, e.g., a cutting or drawing path. In some embodiments, the reference location may correspond to a design or plan obtained from obtained via an online design store.

Systems and methods of the present disclosure relate generally to facilitate performing a task on a surface such as woodworking or printing. More specifically, in some embodiments, the present disclosure relates to mapping the surface of the material and determining the precise location of a tool in reference to the surface of a material. Some embodiments relate to obtaining and relating a design with the map of the material or displaying the current position of the tool on a display device. In some embodiments, the present disclosure facilitates adjusting, moving or auto-correcting the tool along a predetermined path such as, e.g., a cutting or drawing path. In some embodiments, the reference location may correspond to a design or plan obtained from obtained via an online design store