An image reading apparatus includes a transport unit which transports a document, and reading units which read an image of the document which is transported. It is assumed that an operation of reading an image when specific setting information is not input to a control device of the image reading apparatus is set to a first reading mode, and an operation of reading an image when specific setting information is input to the control device is set to a second reading mode. In this case, in the second reading mode, image data of an image with a resolution which is equal to that in the first reading mode is generated, while causing the reading units to read an image from a document which is transported by the transport device at a lower speed than that in the first reading mode.

An image forming apparatus includes a first reading unit configured to read a first image on a first surface of a document, a second reading unit configured to read a second image on a second surface of the document different from the first surface, a printing unit configured to print a third image on a sheet, and a setting unit configured to set resolution of the third image printed by the printing unit. The printing unit prints the third image on the sheet with the resolution set by the setting unit. The printing unit also prints a fourth image with resolution lower than or equal to a threshold, without using the set resolution, the fourth image used for correction of at least a color value obtained by reading the second image using the second reading unit.

An image reading apparatus includes a document tray on which a document is stacked; a conveyance unit configured to convey the document stacked on the document tray; a reader configured to read the image of the document conveyed by the conveyance unit using a sensor. The sensor includes a first light receiving element row having a plurality of light receiving elements, which receives light of a first color, arranged in a main scanning direction; and a second light receiving element row having a plurality of light receiving elements, which receives light of a second color, arranged in the main scanning direction, wherein the first light receiving element row and the second light receiving element row are arranged in a sub-scanning direction orthogonal to the main scanning direction. The image reading apparatus further includes a setting unit and a determination unit.

An imaging device comprises an imaging sensor and a pulsed LED for illuminating an imaging object of the imaging sensor, performs respective imagings according to respective imaging conditions each including an exposure time te of the imaging sensor and a lighting time tr of the pulsed LED, stores respective combinations of brightness index values D1 of respective images obtained by the respective imagings and the imaging conditions of the respective images, obtains estimates of exposure contribution degree k_off indicating degree of influence of variation of the exposure time te on brightness index value and a lighting contribution degree k_on indicating degree of influence of variation of the lighting time tr on brightness index value, based on the stored combinations of the brightness index values D1 and the imaging conditions, and determines an imaging condition to be used in the next imaging based on the estimates of k_on and k_off.

An image reading apparatus includes: a conveyance unit configured to convey the original; an image reading unit configured to read an image of the original conveyed by the conveyance unit by using a reading sensor to generate image data which represents a reading result; at least one processor configured to: detect a streak image in an image represented by the image data based on the image data; determine a content area in the image represented by the image data, the content area being an area where content is printed, and perform correction processing for removing the streak image by correcting the image data; wherein the at least one processor is configured to be operable in a first reading mode in which the correction processing is performed to image data corresponding to the streak image in an area outside the content area.

A reading device includes: a reader; and a controller. The reader is configured to read both of a sheet of paper and a card as an original. The controller is, when the card having four original corners is set as the original, configured to perform for implementing a card reading function: (a) reading; and (b) acquiring. The (a) reading reads the original with the reader to acquire original image data corresponding to an original image area having four corner regions. The (b) acquiring acquires edge information of a first original corner from the original image data to estimate a round shape of the first original corner using the edge information. The first original corner being one of the four original corners in the original.

There is provide a photoelectric conversion device. In a first mode, a control unit performs control such that a signal output from each of a plurality of pixels is held in a corresponding holding unit. In a second mode, the control unit performs control of outputting a signal from the holding unit corresponding to a pixel in a first column and control of holding a signal based on a pixel in the first column in the holding unit corresponding to a pixel in a second column in parallel in the same period.

On the basis of first read image data obtained by reading a first face, a controller calculates a first sub scanning size, which is a size of the first face in a sub scanning direction. On the basis of second read image data obtained by reading a second face, the controller calculates a second sub scanning size, which is a size of the second face in the sub scanning direction. The controller determines the larger of the first sub-scanning size and the second sub-scanning direction size to a definitive sub scanning size, which is the size of the document in the sub scanning direction set on the document stage.

An image forming apparatus includes an original reading unit; an image forming unit, an image data sending unit; and a mode setting unit for setting one of original reading modes including a first original reading mode for the original reading unit to read originals of the same size, and a second original reading mode for the original reading unit to read originals of different sizes; and a control unit for controlling the original reading unit and the image forming unit so as to execute a copy job including the original reading process and the image forming process, and a sending job including the original reading process and the sending process. The mode setting unit is capable of independently setting, for the copy job and the sending job, a default value indicating the first original reading mode or the second original reading mode.

Embodiments of the present disclosure provide an image processing apparatus comprising: a reader that reads an image from a document; a projection unit that projects an image; a printer that prints an image onto a sheet; an operation unit that accepts a first instruction for the projection unit to project the image read by the reader and a second instruction for the printer to print the image projected by the projection unit; and a control unit, wherein in a case where the first instruction is accepted by the operation unit, the control unit causes the projection unit to project the image read by the reader, and in a case where the second instruction is accepted by the operation unit, the control unit causes the printer to print the image being projected by the projection unit.