An information processing device includes a retaining unit and an image display. The retaining unit retains image-formation-related information of an image forming apparatus that forms an image. The image display causes a display section of a portable terminal having the display section and an image capturing section to display an image for assisting with an operation of the image forming apparatus based on a captured image result of the image capturing section and the image-formation-related information retained in the retaining unit.

An image forming apparatus which is capable of appropriately replaying movies to be displayed to the user. The image forming apparatus stores combinations of a plurality of movies for a plurality of maintenance procedures of the image forming apparatus and orders of replay for the plurality of movies according to each type of the plurality of maintenance procedures, specifies a type of the maintenance procedure to be executed to the image forming apparatus, and acquires a plurality of movies corresponding to the type of the specified maintenance procedure based on the stored information and replays the acquired movies as a series of movies according to the orders of relay.

A medium stores a program. The program causes a computer to: acquire relative area information which at least indicates a relative position of a reference area relative to a reference document and a relative size of the reference area relative to a size of the reference document; acquire target image data which indicates a target image including a document; identify a target area in the target image by use of the target image data, the target area being in the relative position, which is indicated by the relative area information, relative to the target image, the target area having the relative size, which is indicated by the relative area information, relative to the size of the target image; analyze an area, in the target image, including the target area; and output output image data based on the target image data.

A digital image is captured. The captured digital image includes a calibration pattern. The calibration pattern includes displayed information about the calibration pattern. The displayed information is read to obtain calibration information about the captured digital image.

An image processing apparatus includes an acquisition unit that acquires, from image data acquired in such a manner that a chart formed by an image forming unit is read, a line signal value from pixel values of pixels for a line arranged in a first direction of the chart and a line representative value by using line signal values respectively acquired from a plurality of lines adjacent to each other in a second direction different from the first direction of the chart, and a determination unit that determines a portion where a streak is generated in the second direction by using a difference between a first representative value and a second representative value.

A method of measuring a display delay time includes a step where a display pattern displayed on a first display including i (i is a natural number greater than 2) display elements is switched to a display pattern other than the display pattern at every elapse of a pattern continuation time, and j (j is a natural number, 1<j<i) display elements brought into a first display state is switched at every elapse, a step where an image of the display pattern on the first display is captured, a step where the captured image is displayed on a second display, and a step where the display delay time from capturing the image on the first display to displaying the image on the second display is measured based on a difference between the display pattern on the first display and the display pattern on the second display.

An information processing device includes a retaining unit and an image display. The retaining unit retains image-formation-related information of an image forming apparatus that forms an image. The image display causes a display section of a portable terminal having the display section and an image capturing section to display an image for assisting with an operation of the image forming apparatus based on a captured image result of the image capturing section and the image-formation-related information retained in the retaining unit.

A method of measuring a display delay time includes a step where a display pattern displayed on a first display including i (i is a natural number greater than 2) display elements is switched to a display pattern other than the display pattern at every elapse of a pattern continuation time, and j (j is a natural number, 1<j<i) display elements brought into a first display state is switched at every elapse, a step where an image of the display pattern on the first display is captured, a step where the captured image is displayed on a second display, and a step where the display delay time from capturing the image on the first display to displaying the image on the second display is measured based on a difference between the display pattern on the first display and the display pattern on the second display.

A method of measuring a display delay includes a first step where a first display device performs a switching operation of switching a display pattern displayed on a display unit of the first display device, a second step where a first camera captures a first image and displays the first image in a live view mode, a third step where a second camera captures a second image containing the first image and records at least the first image contained in the captured second image while being correlated with information indicative of an imaging time when the second image is captured, and a fourth step where a display delay time of the first camera from the imaging of the first image to the display of the first image is deduced from the time indicated by the display pattern contained in the first image and the information indicative of the imaging time.

What is disclosed is an apparatus and method for calibrating an optical module of a document scanning device. In one embodiment, imaging sensors of an optical module of the scanning device are used to obtain an image scan of a calibration strip mounted on a surface of a platen on which a sheet to be scanned has been manually placed. The calibration strip has a first vertical line at a first distance from a right edge of the strip, a second vertical line at a second distance from a left edge of the strip, and a sloping horizontal line positioned between the first and second vertical lines. A slope of the horizontal line is non-zero. In a manner more fully disclosed herein, the image scan of the calibration strip is to obtain calibration measurements. The calibration measurements are, in turn, used to calibrate the scan head of the optical module.