A control method in a printing apparatus includes printing, by a printing unit, an adjustment image for adjusting a printing position on a sheet, conveying, by a conveying unit, the sheet on which the adjustment image is printed, reading, by a reading unit, an image to generate image data, the reading unit being executable to perform reading by a first reading method for reading an image of a sheet without conveying the sheet or a second reading method for reading the image of the sheet while conveying the sheet, and determining, based on that a type of the sheet on which the adjustment image is to be printed is a specific type, to read the adjustment image by the first reading method.

Included is a print permitting/forbidding control unit configured to decide actual permitting/forbidding regarding printing regarding each of sheet feed trays, based on any one of, or a combination of any two or more of, settings of permitting/forbidding printing with regard to each sheet feed tray, setting's of permitting/forbidding printing with regard to each sheet size, and settings of permitting/forbidding printing with regard to each sheet type. At least part of settings used by the print permitting/forbidding control unit to decide actual permitting/forbidding regarding printing, out of the settings of permitting/forbidding printing with regard to each sheet feed tray, settings of permitting/forbidding printing with regard to each sheet size, and settings of permitting/forbidding printing with regard to each sheet type, can be made to differ for each user.

A reflected light amount from a patch under a first light source is acquired, and a reflected light amount from the patch under a second light source whose wavelength band is different from the first light source is acquired. The type of a printing medium on which the patch is printed is determined based on the ratio of the two acquired reflected light amounts.

A user interface of a printer displays instructions to use the printer's document scanner for scanning a sheet of print media (of a stack of print media being added to the paper drawer) in response to a drawer sensor detecting the opening of the paper drawer. The document scanner generates an electronic image of the sheet of print media from the scanning of the sheet of print media. The processor evaluates the electronic image of the sheet of print media to identify the media type and color of the stack of print media being added to the paper drawer. For example, this is done by evaluating the size, color characteristic, transparency, and reflection characteristic of the electronic image of the sheet of print media. Then, the electronic memory records that the paper drawer contains the stack of print media having a specific media type and color.

A printer driver is implemented with a drawing function for each of the driver-executable drawing processes. The drawing function includes a first drawing function corresponding to a first drawing process. The printer driver causes the controller to receive an execution instruction of the driver-executable drawing process from the operating system together with setting information of the driver-executable drawing process. The first drawing function causes the controller to execute the first drawing process when the execution instruction to instruct execution of the first drawing process is received and a value of the setting information as received is a first value, while transmit a non-execution information indicating that the first drawing process is not executed to the operating system without executing the first drawing process when the execution instruction to instruct execution of the first drawing process is received and the value of the received setting information is not the first value.

A recording medium conveyance device includes a storage, a conveyer that conveys a conveyed object, an ultrasonic sensor that outputs a value indicating an attenuation amount of an ultrasonic wave caused by the conveyed object, and a hardware processor. The hardware processor executes a type detection process of detecting a type of the conveyed object based on output of the ultrasonic sensor and storing the type in the storage and an overlay detection process of detecting whether the conveyed object is in an overlay state in which a gap is present based on output of the ultrasonic sensor, and switches to either one of the type detection process and the overlay detection process. The hardware processor executes the type detection process when the type is not stored in the storage and executes the overlay detection process when the type is stored in the storage.

A sheet conveyance apparatus includes a sheet conveyor configured to convey a sheet, a guide configured to form a conveyance path through which the sheet is conveyed by the sheet conveyor, and a sensor disposed on a same side as the guide with respect to the conveyance path. The guide includes a retracted portion disposed over a first region in a sheet width direction perpendicular to a sheet conveyance direction, the retracted portion being retracted with respect to a second region of the guide in the sheet width direction so as not to come into contact with the sheet passing through the conveyance path, the first region including a detection region of the sensor in the sheet width direction, the second region being a sheet passing region of the sheet in the sheet width direction excluding the first region.

An image forming apparatus includes: image former forming an image on a sheet; a sheet storage storing the sheet; a sheet feeder feeding the sheet stored in the sheet storage to the image former; a sheet characteristic detector detecting characteristics of the sheet fed by the sheet feeder; and a hardware processor controlling image forming in the image former on the basis of the sheet characteristics detected by the sheet characteristic detector, wherein the sheet feeder feeds a first sheet in order to detect the sheet characteristics by the sheet characteristic detector before forming an image by the image former, and after the sheet characteristic detector has finished detecting the characteristics of the first sheet, the sheet feeder feeds a second sheet on which the image is to be formed by the image former under image forming conditions set on the basis of the detected characteristics of the first sheet.

In an information processing apparatus, a processor determines, on the basis of a setting value, at least one image process to be performed on the first scan data. The processor performs a clipping process on first scan data to generate second scan data including original scan data and not including outer scan data. The processor performs an edge correction process on the second scan data to generate third scan data by correcting edge data of the original scan data. The processor performs a characteristic acquisition process on the third scan data to acquire characteristic information indicating a characteristic of the third scan data. The processor performs a specific process on the second scan data by using the characteristic information in a case where both the clipping process and the characteristic acquisition process are determined to be performed and the edge correction process is determined not to be performed.

A sheet discriminator, which is incorporated in an image forming apparatus and an image forming system, includes a sheet loader on which a recording medium is loaded, an information detector including a light emitter to emit light to a surface of the recording medium loaded on the sheet loader and a light receiver to receive the light emitted by the light emitter and detecting information of the recording medium, a sheet distinguisher to distinguish a type of the recording medium based on the information detected by the information detector, and a light emission controller to control activation and stop of the light emitter and activate the light emitter before the information detector starts detection of the information of the recording medium.