An image scanning apparatus includes a controller configured to perform a light quantity adjustment determining process to determine whether a detection light quantity needs to be adjusted, based on adjustment determination values, in a black-white detectable position, a light quantity adjusting process to adjust the detection light quantity to maximize an adjustment difference value between a gradation value generated by scanning a white portion of a reference member and a gradation value generated by scanning a black portion of the reference member, a threshold calculating process to calculate a detection threshold based on a black value and a white value, and a reference position detecting process to detect a reference position by comparing, with the detection threshold, gradation values generated by scanning the reference member while illuminating the reference member with the detection light quantity.

An image scanning apparatus determines whether there is an influence of external light from the outside of the image scanning apparatus on scanning; decides a correction value corresponding to each of a plurality of sensors based on received light amounts of at least some of the plurality of sensors; and corrects, using the correction value corresponding to each of the plurality of sensors and decided, data corresponding to a received light amount of each of the plurality of sensors when scanning the original, wherein if it is determined that there is the influence of the external light, the image scanning apparatus decides the correction value corresponding to a first sensor and the correction value corresponding to a second sensor arranged at a position that is readily influenced by the external light based on the received light amount of the first sensor.

An image reading apparatus including a controller configured to perform an update processing for updating shading correction data stored in a memory by a generation processing of generating shading correction data based on an image signal of a reference member and perform a size determination processing for determining a size of a document based on an image signal of the document, wherein, when the document on the document platen is read, the controller performs the generation processing before the document is read, and an image processing portion performs the shading correction using the shading correction data generated before the document is read, and wherein, when the size determination processing is performed, the image processing portion performs the shading correction using the shading correction data stored in the memory, and the update processing is not performed.

A print control apparatus that realizes printed matter that appears suitably in a case of observation by reflected light and in a case of observation by transmitted light is disclosed. The print control apparatus, based on data of a source image, generates first print data to be used for printing to a first surface of a recording medium. The print control apparatus also, based on data of the source image, generates second print data that is used for printing to a second surface that is different to the first surface and that represents a higher luminance range, in a luminance range that the data of the source image represents, than a luminance range that the first print data represents.

The present invention relates to a document scanning apparatus which is composed of an automatic document feeding device and an image capturing device. The document scanning apparatus establishes a private area network between the automatic document feeding device and the image capturing device, and causes the automatic document feeding device to send a message to the image capturing device. When the message is received, said image capturing device performs corresponding operations in response to the message. Said operations may comprise, for example adjusting the relative position between the image capturing device and the automatic document feeding device or doing multi-documents scan.

An image reading device includes a housing that is provided with a contact glass, a document cover, an illumination unit that is received in the housing, and a document size detection unit that performs a document size detection operation for detecting a size of a document by using light irradiated toward the document on the contact glass from the illumination unit when the document cover is switched to a closed state. The illumination unit includes a light guide body extending in a front and rear direction of the housing, a first light source that is disposed at a front side of the light guide body and emits incident light to the light guide body toward a rear side, and a second light source that is disposed at a rear side of the light guide body. In the document size detection operation, only the first light source is lighted.

An image forming apparatus includes: a light source that irradiates a document with light; a hardware processor that controls lighting of the light source; a cover that is opened and closed with respect to a document platen on which a document is placed; and a detector that detects a person. When the detector detects a person and when an open angle of the cover is a predetermined angle or less, the hardware processor turns on the light source.

The present disclosure provides a scanning imaging part, and related products and methods. The scanning imaging part includes a transparent body, a light blocking ink, a charged liquid droplet, and a microfluidic component. The transparent body may include a first face and a second face opposite to each other. An image sensor may be arranged on the second face. The charged liquid droplet and the light blocking ink may be insoluble with each other, and may be filled in a liquid flow channel. The charged liquid droplet may transmit at least a part of light incident from the first face through the charged liquid droplet and to the image sensor. The microfluidic component may drive the charged liquid droplet to move in the liquid flow channel. Thereby, light incident from the first face may be scanned via the charged liquid droplet and form a scanning image by the image sensor.

An image scanning apparatus includes a controller configured to perform a light quantity adjustment determining process to determine whether a detection light quantity needs to be adjusted, based on adjustment determination values, in a black-white detectable position, a light quantity adjusting process to adjust the detection light quantity to maximize an adjustment difference value between a gradation value generated by scanning a white portion of a reference member and a gradation value generated by scanning a black portion of the reference member, a threshold calculating process to calculate a detection threshold based on a black value and a white value, and a reference position detecting process to detect a reference position by comparing, with the detection threshold, gradation values generated by scanning the reference member while illuminating the reference member with the detection light quantity.

An image reading apparatus includes a main body, a document pressing plate, and a light shielding portion. The main body has an image obtaining portion which irradiates illumination light on a document placed on a contact glass and captures an image formed on the document. The document pressing plate is attached to the main body in such a way as to pivot around a pivot shaft that is provided on a rear side above an upper surface of the main body. The pivot shaft moves in an up-down direction with respect to the main body. The light shielding portion, when the document pressing plate presses downward the document, extends downward from the document pressing plate with increase of an interval between the document pressing plate and the upper surface on the rear side in the up-down direction, so as to shield the illumination light not to leak outside.