An image processing device is configured to perform: reading an image of an original while a light emitting portion emits light with a first lighting color to acquire first image data representing the image; storing the first image data in a memory; executing a recognition process for recognizing an ID photograph in the image represented by the first image data; in response to determining that the ID photograph is recognized, outputting the image represented by the first image data; in response to determining that the ID photograph is not recognized, switching a lighting color of the light emitting portion from the first lighting color to a second lighting color different from the first lighting color; and reading the image of the original while the light emitting portion emits light with the second lighting color to acquire second image data representing the image.

Provided is an optical apparatus including a line sensor that includes plural detection portions arranged in a lateral direction, the detection portions including plural light-receiving elements arranged in a line shape in a longitudinal direction, and a direction corresponding to the lateral direction being set as a first direction and a direction corresponding to the longitudinal direction being set as a second direction in a surface perpendicular to an optical axis of light which forms an image on the line sensor, and a reduction optical system that reflects light from an original document and guides the reflected light to the detection portion, and includes plural curved-surface mirrors that have curvatures in the first direction and the second direction as a whole.

A reading apparatus includes a first roller pair, a second roller pair provided downstream of the first roller pair, a light transmitting member, a reading portion and an opposing member. The transmitting member is disposed between the first and second roller pairs in a sheet feeding direction and on a first side in a vertical direction with respect to a nip line of the first roller pair. The opposing member is disposed on a second side opposite to the first side with respect to the transmitting member. As seen in a sheet widthwise direction, a surface of the second side of the transmitting member in the vertical direction is inclined, with respect to the nip line, to the second side toward downstream of the sheet feeding direction.

An image processing apparatus includes an invisible light source configured to emit invisible light to a subject, a visible light source configured to emit visible light to the subject, an invisible image reading sensor configured to read invisible reflection light reflected from the subject and acquire an invisible image, and a visible image reading sensor configured to read visible reflection light reflected from the subject and acquire a visible image. The invisible reflection light is a part of the invisible light emitted from the invisible light source. The visible reflection light is a part of the visible light emitted from the visible light source. The image processing apparatus further includes circuitry configured to restore information lost in the invisible image acquired by the invisible image reading sensor.

An image forming apparatus and method for color registration are provided. The image forming apparatus according to an example includes a communication device to receive print data, a print engine including a plurality of photosensitive drums, and a processor to control the print engine to print the received print data on a plurality of printing papers, and to form a predetermined pattern for color registration in an inter-paper distance section between two of the plurality of printing papers on a paper feeding path.

A process and an apparatus for producing 3D moldings, wherein a spectrum converter is used. Said converter is defined as a means which absorbs a radiation, for example electromagnetic thermal radiation, and radiates or emits one or more defined wavelength ranges; the spectrum converter is here irradiated by an emitter of an electromagnetic thermal radiation (shortwave or longwave radiation), i.e. by a lamp or an emitter, for example an overhead emitter or a sintering unit, and then emits a defined electromagnetic thermal radiation

An image processing portion of an image reading apparatus includes an extraction portion that extracts color information, a management portion that manages management color information that is an estimated value of the color information based on a control signal, a determination portion that determines whether or not the color information matches the management color information, and a writing control portion that causes the storage portion to store the pixel data when it is determined that the color information matches the management color information and that does not cause the storage portion to store the pixel data when it is determined that the color information does not match the management color information. When the color information does not match the management color information, the management portion adjusts the management color information to match the color information.

An image scanning device according to aspects of the present disclosures includes a transparent plate member on which an original document can be placed, a line sensor configured to receive a light emitted from a light source and reflected by the original document, and output an electrical signal according to the reflected light, a holding member configured to cover an upper surface of the plate member, and a controller. The controller is configured to obtain a first electrical signal corresponding to a first reflected light when the light source emits light having a first light amount, obtain a second electrical signal corresponding to a second reflected light when the light source emits light having a second light amount, and determine a particular scanning mode for scanning the original document placed on the plate member based on an image difference value calculated from the first and second electrical signals.

A process and an apparatus for producing 3D moldings, wherein a spectrum converter is used. Said converter is defined as a means which absorbs a radiation, for example electromagnetic thermal radiation, and radiates or emits one or more defined wavelength ranges; the spectrum converter is here irradiated by an emitter of an electromagnetic thermal radiation (shortwave or longwave radiation), i.e. by a lamp or an emitter, for example an overhead emitter or a sintering unit, and then emits a defined electromagnetic thermal radiation.

A reading device includes a first light source configured to emit light, a second light source configured to emit light in a wavelength of light different from a wavelength of light of the first light source, circuitry configured to instruct the first light source and the second light source to turn on and turn off, a first light-intensity adjuster configured to adjust light intensity of the first light source based on a first light intensity value, a second light-intensity adjuster configured to adjust light intensity of the second light source based on a second light intensity value, a first image sensor configured to receive the light that is emitted from the first light source and is reflected by an object, and a second image sensor configured to receive the light that is emitted from the first light source and the second light source and is reflected by the object.