Abstract:
A device for scanning patterns from a surface of a pad includes in combination a scanner which is moved over the pad surface to read data stored in those patterns, and calibration marks preferably provided on the surface of the pad outside the region carrying the patterns. The calibration marks are detectable by the scanner for comparison with parameters of a scanning process.
Abstract:
Apparatus for reading out individual X-ray images recorded on a double-emulsion radiographic film or on separate films that were coincident when exposed simultaneously to a polyenergetic or broad X-ray photon energy spectrum beam emergent from a body and where an image corresponding to one obtained with a low energy part of the spectrum is formed on one film and an image corresponding to a higher energy part of the spectrum is formed on the other. One readout apparatus is for the case of two separate films which, after development, are illuminated from the back and optically scanned to derive analog signals representative of the intensities of spatially corresponding picture elements on each film. Another apparatus is for the case where the two images are on opposite sides of a film and are represented by alternate fine image information lines obtained by interposing a grid during the X-ray exposure. Another is for the case where a reflective layer is disposed between the film images during readout. In all cases the films are optically scanned and the resulting analog signals are digitized and variously processed to yield an image representative of that which is different between the two original different energy images.
Abstract:
An apparatus for moving a unit to execute scanning includes a scanning unit including a motor, an encoder for outputting a signal according to movement of the unit, a detection unit for detecting a current supplied to the motor, a speed control unit for executing a speed control of the motor according to the signal output from the encoder and the current detected by the detection unit, a movement control unit for setting a threshold value, moving the unit by driving the motor, by using the speed control unit, and a current control unit for setting a value greater than the predetermined value according to the threshold value and value of the current detected by the detection unit at a predetermined timing during a time period while the unit is moving.
Abstract:
There is provided a document, wherein a measurement image for measuring a position of an image relative to a document is formed on a first surface thereof, a designation image for designating a document position, at which the document is placed on an image reading apparatus that reads an image, is formed on a second surface thereof, and wherein the document is spaced from an end portion of a reading region of the image reading apparatus by placing the document in accordance with the designation of the designation image, and the designation image is formed such that the measurement image is placed in the reading region of the image reading apparatus.
Abstract:
There is provided a document, wherein a measurement image for measuring a position of an image relative to a document is formed on a first surface thereof, a designation image for designating a document position, at which the document is placed on an image reading apparatus that reads an image, is formed on a second surface thereof, and wherein the document is spaced from an end portion of a reading region of the image reading apparatus by placing the document in accordance with the designation of the designation image, and the designation image is formed such that the measurement image is placed in the reading region of the image reading apparatus.
Abstract:
A computer peripheral that may operate as a scanner. The scanner captures image frames as it is moved across an object. The image frames are formed into a composite image based on computations in two processes. In a first process, fast track processing determines a coarse position of each of the image frames based on a relative position between each successive image frame and a respective preceding image determine by matching overlapping portions of the image frames. In a second process, fine position adjustments are computed to reduce inconsistencies from determining positions of image frames based on relative positions to multiple prior image frames. As additional image frames are added to the composite image, the size and format of the composite image may be automatically adjusted to facilitate ease of use.
Abstract:
For accurately calibrating an inline scanner a printer such as an inkjet printer may print a pattern, which is scanned by the inline scanner. The method is configured such that print artifacts resulting from not yet calibrated print heads do not significantly influence the calibration of the scanner. After calibration of the scanner, the print heads and the control units driving the print heads may be calibrated using the calibrated inline scanner.
Abstract:
A light scanning apparatus is provided in which a light source is controlled so that the total exposure energy density of when light beams are emitted to an image carrying member across light deflection scanning of a plurality of times becomes constant on the image carrying member, thereby high image quality, long lasting output images are obtained. Exposure energy density necessary when exposure is completed by light deflection scanning of one time is set to Ex1, the latent image electrical potential deepness of a latent image formed thereof is set to Vs1, total exposure energy density across light deflection scanning of a plurality of times is set to Ex_n, the latent image electrical potential deepness thereof is set to Vs_n, wherein Ex_n=Ex1−ΔEx and {(Vs_n/Vs1)^3−1.05}×Ex1
Abstract:
A flatbed scanner includes a transparent window and an optical ruler close to the transparent window along a scanning direction. The optical ruler has at least one oblique line arranged thereon. The flatbed scanner includes a scanner head having a scanning width larger than the width of the transparent window for capturing an image of the optical ruler while the scanner head is being progressively moved by a step motor. The flatbed scanner further includes a processing unit for calculating a jag width of a captured oblique line in the captured image and a controlling unit for controlling the step motor to adjust the speed of movement of the scanner head according to the jag width of the captured oblique line.
Abstract:
A first part calculates corrected image data for each pixel in the range in which the reading parts of the adjacent image sensors overlaps in the main scan direction, for correcting the image data for a position shift less than an amount corresponding to one pixel in the main scan direction of the image sensors. A correcting method is determined in such a manner that a position shift amount to be corrected increases in a step-by-step manner as moving from a base portion to an end portion in the range in which the adjacent image sensors overlap in the main scan direction. A second part multiplies the image data corrected by the thus-determined correcting method by a weighting factor determined according to a position in the main scan direction in the adjacent image sensors.