An apparatus including an illuminator to emit light on a media to be printed on is provided. The apparatus also includes an optical sensor disposed proximate to the illuminator to detect an amount of reflected light. In addition, the apparatus includes a processor to control the illuminator and the optical sensor. The processor is to calibrate the illuminator to determine a first brightness level for high sensitivity at the optical sensor. The processor is to calibrate the illuminator to determine a second brightness level iteratively based on a signal to noise ratio. The processor is to compare the second brightness level with the first brightness level to determine whether to proceed with detection of an edge of the media using the second brightness level.

An apparatus including an illuminator to emit light on a media to be printed on is provided. The apparatus also includes an optical sensor disposed proximate to the illuminator to detect an amount of reflected light. In addition, the apparatus includes a processor to control the illuminator and the optical sensor. The processor is to calibrate the illuminator to determine a first brightness level for high sensitivity at the optical sensor. The processor is to calibrate the illuminator to determine a second brightness level iteratively based on a signal to noise ratio. The processor is to compare the second brightness level with the first brightness level to determine whether to proceed with detection of an edge of the media using the second brightness level.

An image forming apparatus includes a reception unit that receives an instruction to place and print an image in an area of a specific shape having an aspect ratio different from an aspect ratio of a recording sheet; a print control unit performs control such that a support image is on the recording sheet, the support image supporting specification of a cut position to cut out the area of the specific shape, in which the image of which printing instruction is received by the reception unit is printed, from the recording sheet; and an output unit outputs an explanatory image that explains the cut position with respect to the support image, in a case where the reception unit receives the printing instruction.

An image forming apparatus includes a reception unit that receives an instruction to place and print an image in an area of a specific shape having an aspect ratio different from an aspect ratio of a recording sheet; a print control unit performs control such that a support image is on the recording sheet, the support image supporting specification of a cut position to cut out the area of the specific shape, in which the image of which printing instruction is received by the reception unit is printed, from the recording sheet; and an output unit outputs an explanatory image that explains the cut position with respect to the support image, in a case where the reception unit receives the printing instruction.

An image forming apparatus includes a reception unit that receives an instruction to place and print an image in an area of a specific shape having an aspect ratio different from an aspect ratio of a recording sheet; a print control unit performs control such that a support image is on the recording sheet, the support image supporting specification of a cut position to cut out the area of the specific shape, in which the image of which printing instruction is received by the reception unit is printed, from the recording sheet; and an output unit outputs an explanatory image that explains the cut position with respect to the support image, in a case where the reception unit receives the printing instruction.

An image forming apparatus includes a reception unit that receives an instruction to place and print an image in an area of a specific shape having an aspect ratio different from an aspect ratio of a recording sheet; a print control unit performs control such that a support image is on the recording sheet, the support image supporting specification of a cut position to cut out the area of the specific shape, in which the image of which printing instruction is received by the reception unit is printed, from the recording sheet; and an output unit outputs an explanatory image that explains the cut position with respect to the support image, in a case where the reception unit receives the printing instruction.

A printer apparatus includes a memory unit configured to record a first correction value, a print unit configured to print print data on a first medium by feeding the first medium on the basis of the first correction value when the print data is received from a printer control apparatus, a sensor unit configured to measure a measurement value corresponding to a feeding error of the first medium, a measurement value transmission unit configured to transmit the measurement value to the printer control apparatus, and a correction value update unit configured to update the first correction value to a second correction value received from the printer control apparatus, wherein the print unit prints the print data on a second medium by feeding the second medium on the basis of the second correction value when a retry command is then received from the printer control apparatus.

A printer apparatus includes a memory unit configured to record a first correction value, a print unit configured to print print data on a first medium by feeding the first medium on the basis of the first correction value when the print data is received from a printer control apparatus, a sensor unit configured to measure a measurement value corresponding to a feeding error of the first medium, a measurement value transmission unit configured to transmit the measurement value to the printer control apparatus, and a correction value update unit configured to update the first correction value to a second correction value received from the printer control apparatus, wherein the print unit prints the print data on a second medium by feeding the second medium on the basis of the second correction value when a retry command is then received from the printer control apparatus.

An image forming apparatus includes a transmission-type photosensor including a light-emitting part and a light-receiving part, disposed on opposite sides of a media conveyance path; a sensor retainer to retain the light-emitting part and the light-receiving part; a suspended needle indicator including one end portion freely rotatably disposed on the sensor retainer at a position higher than the photosensor, and an indicator disposed on another end thereof; and an angle viewer with scale marks that mark an angle of an optical axis of the photosensor from a vertical direction. The photosensor is disposed with the optical axis thereof is angled within a predetermined adjusted angle relative to the media conveyance path.

An image forming apparatus includes a transmission-type photosensor including a light-emitting part and a light-receiving part, disposed on opposite sides of a media conveyance path; a sensor retainer to retain the light-emitting part and the light-receiving part; a suspended needle indicator including one end portion freely rotatably disposed on the sensor retainer at a position higher than the photosensor, and an indicator disposed on another end thereof; and an angle viewer with scale marks that mark an angle of an optical axis of the photosensor from a vertical direction. The photosensor is disposed with the optical axis thereof is angled within a predetermined adjusted angle relative to the media conveyance path.