摘要:
An image reader capable of outputting excellent quality read images, without illumination irregularities, similar to that of flat documents even when the document surface is curved as in the case of book-like documents. An image reader provided with a memory to store correction data to correct differences of illumination of each pixel of a document image, and which corrects the read information of each pixel in a document image using correction data corresponding to the measured height of a document surface among correction data stored in the memory. For one aspect, this image reader is constructed so as to correct a group of read information corresponding to a set of pixels arrayed in one direction by excluding specific frequencies among the illumination distribution from the set.
摘要:
An image reader for reading book-like documents placed on a document platen in a face upward condition, said image reader comprises a shading reference panel provided beside the document platen which is white in color and of uniform density, an image reading device which reads the document platen on which the book-like document is placed and the shading reference panel, and outputs image data, a height detector which detects a height distribution of the book-like document, an illuminance detector which detects an illuminance irregularity in accordance with the image data corresponding to the shading reference panel, calculator which calculates shading correction data in accordance with the height distribution and the illuminance irregularity on the shading reference panel and, shading corrector which corrects the illuminance irregularity of the image data corresponding to the book-like document in accordance with the shading correction data.
摘要:
An image reading apparatus which reads document surfaces of open book-like documents placed on a document platen in a face upward condition, the image reading apparatus comprises; a first detector which detects a height distribution of a document surface in a main scanning direction, a second detector which detects a height distribution of the document surface in a sub-scanning direction, and a direction discrimination device for discriminating whether a placement direction of the document is a main scanning direction or a sub-scanning direction based on the height distributions.
摘要:
An image reading apparatus for reading documents disposed face upward on a document platen by optical scanning. The image reading apparatus comprises a color correction filter which has characteristics for shielding light of visible light range and is inserted into said imaging system on prescanning to detect the height of the document.
摘要:
An actuator included in a head substrate of an ink-jet head receives, with an electrode on the surface of the actuator, power fed from the wiring of a wiring substrate arranged opposite the head substrate. A first electrode of the wiring substrate is electrically connected to the wiring, and protrudes to the side of the head substrate. A second electrode is electrically connected to the electrode on the surface of the actuator, protrudes to the side of the wiring substrate and is electrically connected to the first electrode. The head substrate and the wiring substrate are adhered to each other through an adhesive layer such that a space to which the first electrode and the second electrode are exposed is hermetically sealed. The hermetically sealed space is in a vacuum state or is filled with a gas containing a predetermined amount of water or less.
摘要:
A hydraulic or pneumatic device is provided, which comprises a tube comprising a polyamide resin composition comprising (A) from 70 to 97% by weight, based on the weight of the polyamide resin composition, of a polyamide resin and (B) from 3 to 30% by weight, based on the weight of the polyamide resin composition, of a plasticizer comprising an ester of p- and/or o-hydroxybenzoic acid with a C12–C22 aliphatic alcohol having a branched chain and a component comprising a rubber compound comprising a polar rubber as a main component, and which exhibits a high reliability over an extended period of time.
摘要:
The imaging device divides the two-dimensional photo object into multiple sections before performing imaging, and obtains an ultra-high resolution complete image by splicing together the partial images of the photo object. To this end, in the imaging device, the area sensor is held essentially parallel to the photo object, and the imaging lens is moved such that its optical axis L draws a circle with the normal line N that passes trough the center of the area sensor 20 as the center of the circle. The imaging lens is stopped at each of the positions at which the imaging optical system optical axis that connects the center of the area sensor and the principal point of the imaging lens passes through the imaging center point of each section of the photo object, in order to perform imaging of each section of the photo object.
摘要:
A truss type actuator including two piezoelectric devices drives a chip member provided at a crossing point of the piezoelectric devices for moving along an elliptic or a circular trail. The piezoelectric devices are respectively driven by driving signals having a frequency equal to or near to the resonance frequency of the piezoelectric devices. By utilizing the resonance phenomenon, the displacements of the piezoelectric device can be increased as larger as possible.
摘要:
In the present invention, a specific region in which the edge of the document is specified as the exterior edge is discriminated for the presence of an image, and images separated from the exterior edge of an area positioned on the interior side of the interior edge of said specific region are discriminated as unnecessary images and erased. Also, in the present invention, images including parts adjacent to the edge of a document within a read image are examined and intersections of the edges and outlines of the images are discriminated, and unnecessary images of user fingers are discriminated from necessary images such as headers and the like and erased. Also, in the present invention, images directly adjacent to the exterior side and interior side of the document edges can be discriminated as unnecessary images by focusing on the hands of a user holding the book document and covering a part of the document at the exterior side, and recognizing similarities in pixel density.
摘要:
The image reading apparatus is able to execute two image density controls. In one image density control, the image density of the document is detected and adjusted based on the detection, and in the other image density control, the document height is detected and the image density of the document is adjusted based on the detected height. Either of the two image density controls is selected based on the type or the shape of the document for execution of the density control.