Abstract: A printing apparatus includes a printing unit configured to print an image on a sheet; a first exit path from which the sheet with the image printed thereon by the printing unit is discharged while being reversed; a second exit path from which the sheet with the image printed thereon by the printing unit is discharged without being reversed; and a switch member configured to be pivotably arranged so as to switch between the first exit path and the second exit path. The first exit path passes above a pivot center of the switch member, and the second exit path passes below the pivot center.

Abstract: A measurement apparatus includes: a light source configured to irradiate a measurement region of skin whose color is to be measured with light; a light receiving unit configured to receive reflected light from the measurement region or transmitted light that has passed through the measurement region; a calculation unit configured to repeatedly obtain determination information and color information relating to the color of the measurement region, based on a light-receiving result of the light receiving unit; and a selection unit configured to select a measurement result of a color of the skin from the repeatedly-obtained color information, based on a temporal change in the determination information.

Abstract: A measurement apparatus includes: a light source configured to irradiate a measurement region of skin whose color is to be measured with light; a light receiving unit configured to receive reflected light from the measurement region or transmitted light that has passed through the measurement region; a calculation unit configured to repeatedly obtain determination information and color information relating to the color of the measurement region, based on a light-receiving result of the light receiving unit; and a selection unit configured to select a measurement result of a color of the skin from the repeatedly-obtained color information, based on a temporal change in the determination information.

Abstract: An image forming apparatus includes an exposure unit, including a plurality of light-emitting units that correspond to a respective plurality of pixels and a lens array optical system, for emitting exposure light. A photosensitive member is exposed by the exposure light from the exposure unit. A correcting unit estimates, from image data, an intensity of ghost light at a position of each pixel on the photosensitive member in a case when the photosensitive member is exposed by the exposure unit, using the image data, and corrects the image data based on the estimated intensity of the ghost light.

Abstract: An image forming apparatus includes: a photosensitive member; and an exposure unit. The exposure unit includes a lens array optical system in which a plurality of lenses are disposed along a predetermined direction, and a light-emitting unit having a plurality of light-emitting elements disposed so as to expose, through the lens array optical system, every Lth pixel in L scanning lines of the photosensitive member. An interval of locations, in a main arrangement direction, that correspond to adjacent lenses in the lens array optical system is configured to be an interval based on the value of L.

Abstract: The image forming apparatus reads an original conveyed in the image forming apparatus, analyzes a feature value of information about an original image on the read original, generates an image to overwrite the original image with, using image data having the feature value obtained based on an analysis result, sets a predetermined area on the original image, and overwrites the predetermined area on the original image with the generated image.

Abstract: An apparatus includes an image formation unit including a photosensitive drum and a motor for driving the image formation unit. The apparatus acquires a frequency generator signal, which is phase information output from the motor as the motor rotates. In addition, the apparatus corrects unevenness of the density that may occur due to the rotation of the motor according to the acquired phase information.

Abstract: An image forming apparatus includes: a photosensitive member; and an exposure unit, including a lens array optical system in which a plurality of lenses are disposed along a predetermined direction, and a light-emitting unit having a plurality of light-emitting elements disposed so as to expose, through the lens array optical system, every Lth pixel in L scanning lines of the photosensitive member. An interval of locations, in a main arrangement direction, that correspond to adjacent lenses in the lens array optical system is configured to be an interval based on the value of L.

Abstract: An image forming apparatus includes: an exposure unit including a plurality of light-emitting units that correspond to a respective plurality of pixels and a lens array optical system; a photosensitive member exposed by the exposure unit; and a correcting unit configured to estimate, from image data, an intensity of ghost light at a position of each pixel on the photosensitive member in the case where the photosensitive member is exposed by the exposure unit using the image data, and correct the image data based on the estimated intensity of the ghost light.

Abstract: An image forming apparatus including: a conveyance path through which a recording material is conveyed to form an image on the recording material; a reading unit that reads a document conveyed to the conveyance path; and a control unit that controls an image forming unit to overwrite a document image with an image according to a result of the reading in which the document image on the document, which is conveyed to the conveyance path, is read by reading unit.

Abstract: An image forming apparatus executes banding correction at a level determined according to variation of the density characteristic of the image forming apparatus to achieve a high quality image. In the image forming apparatus, a banding correction unit acquires information about a cause of density variation that may occur in a sub scanning direction of a rotation member, which is used for forming a toner image on an image carrier based on input image information and sets, based on the acquired information, the level of the density correction, which is determined according to the density variation cause information.

Abstract: The present invention provides a color image processing apparatus which reduces the amount of color materials consumed that are used to form a color image with reference to an index with high utility. To accomplish this, a color image forming apparatus of the present invention is a color image processing apparatus which applies image processing to image data of an input color image, and outputs the processed image data, and which changes tone values of respective colors of the color image, so that a conversion result obtained when image data of the color image are converted into amounts of color materials becomes an amount based on a reference conversion result, the reference conversion result being obtained when the image data are color-converted by a predetermined color conversion method and the converted data is further converted into an amount of a color material.

Abstract: The image forming apparatus includes a CPU that performs control to form an inspection image for determining whether or not banding is suppressed to be smaller than a predetermined threshold value; and a density sensor that detects an intensity of banding periodically occurring in a sub-scanning direction of the formed inspection image. If based the detected banding intensity, the CPU has determined that the banding is not suppressed to be smaller than the predetermined threshold value, the CPU performs control to not perform banding correction or performs control to re-set a relationship between a phase of a rotary member and correction information.

Abstract: An image processing apparatus according to this invention performs the first halftone processing for input image data having the first number of gradations, generating halftone image data having the second number of gradations smaller than the first number of gradations. The image processing apparatus evaluates a pixel value difference between input image data and halftone image data, and calculates quantization error data representing a quantization error generated in the halftone image data owing to the first halftone processing. Then, the image processing apparatus performs the second halftone processing for the calculated quantization error data, generating correction data having the second number of gradations for correcting the quantization error generated by the first halftone processing. The image processing apparatus corrects the halftone image data using the correction data.

Abstract: A plurality of test patches each including a dark and light image which has density unevenness of a predetermined period in which the plurality of test patches are differentiated in phase difference relative to a phase of density unevenness induced by rotational unevenness occurring at a predetermined period in the motor for driving a photosensitive drum is formed. Then, density information of the plurality of test patches with is detected by a density sensor 41, and the phase of the density unevenness is obtained based on detection results (density information) of the plurality of test patches as well as based on a phase difference corresponding to a test patch whose density unevenness is a predetermined value in amplitude.

Abstract: An image forming apparatus is capable of more directly solving a problem of unevenly formed line images. The image forming apparatus includes a rotatable photosensitive member, a light emission unit configured to emit a laser beam based on image information, and a transfer unit configured to transfer a toner image developed on the photosensitive member. The image forming apparatus acquires variable speed information, which indicates a variable rotation speed of the photosensitive member. In addition, the image forming apparatus executes image position correction on the image information based on the acquired variable speed information.

Abstract: An image forming apparatus forms a color image using image carriers for a plurality of colors by electrophotography. The image forming apparatus stores, for each color, information on the shift amount between an ideal scanning line and an actual scanning line in the main scanning direction on the image carrier. For each color, a color misregistration correction amount calculation unit converts a readout address in a bitmap memory (403), based on the stored shift amount information, and reads out image data. A color misregistration correction unit (404) performs tone correction for the readout image data based on the address, outputting image data containing the value of the decimal part. A multi-level error diffusion unit (405) performs quantization by multi-level error diffusion processing for the tone-corrected image data containing the value of the decimal part.

Abstract: The image forming apparatus reads an original conveyed in the image forming apparatus, analyzes a feature value of information about an original image on the read original, generates an image to overwrite the original image with, using image data having the feature value obtained based on an analysis result, sets a predetermined area on the original image, and overwrites the predetermined area on the original image with the generated image.

Abstract: A 2-pixel averaging unit (101) halves an input image in the subscanning direction, and a multi-level error diffusion unit (102) performs multi-level error diffusion processing. A 2-pixel reconstruction unit (103) replaces each pixel with two pixels adjacent in the subscanning direction. A density value exchange unit (104) exchanges pixel values adjacent in the subscanning direction in each of 2×2 pixel blocks arranged in a checkered pattern in the image after replacement. High-density blocks each serving as a set of high-density dots and low-density blocks each serving as a set of low-density dots can be generated as 2×2 pixel blocks. The exposure region can be concentrated in PWM conversion.

Abstract: An image forming apparatus including: a conveyance path through which a recording material is conveyed to form an image on the recording material; a reading unit that reads a document conveyed to the conveyance path; and a control unit that controls an image forming unit to overwrite a document image with an image according to a result of the reading in which the document image on the document, which is conveyed to the conveyance path, is read by reading unit.