Abstract:
A control part comprises a division location setting part for setting a division location based on an image data; a scan start position setting part for setting scan start positions of recording heads based on the division location; an image data division part for dividing an image data by the division location; and a head movement control part for controlling movement of the recording heads. The division location setting part sets a division location in a blank area having no pixel to be recorded in the primary scanning direction, in the case of publication printing, in a center margin area between page data. Since the recording heads perform scanning concurrently their respective areas that are divided by the division location, no deterioration in image continuity occurs between the recording heads. This permits an image recorder, though having plural recording heads, capable of performing concurrent recordings without loss of continuity.
Abstract:
An image reading apparatus executes stop processing to stop scanning of the carriage during the scan operation, acquires information on the stop processing executed by the control unit, corrects a restart position of the carriage for a document image reading after the stop processing based on the information acquired.
Abstract:
The invention relates to a method for illuminating printing plates (5) in which the light from a light source (2) is imaged on a two-dimensional light modulator (4) having a plurality of rows of light-modulated cells (8), and said light is modulated thereby, whereupon the light modulator (4) is imaged on light-sensitive material (5) via an imaging beam path (11), wherein the light-sensitive material (5) is moved relative to the light modulator (4) substantially perpendicularly to the direction of the rows of light-modulated cells (8) at a relative speed and wherein the data pattern to be imaged on the light-sensitive material (5) is displayed beginning in the first row of the light modulator (4) in each row consecutively during a respective exposure time (T, T') and then moved to the subsequent row of the light modulator (4). In order to improve said method, the invention proposes that the image (10) of the data pattern be held substantially stationary relative to the light-sensitive material (5) during the exposure time (T, T').
Abstract:
A digital image-setter utilizing a micro-display (10) which produced, offset-printing plates with high print resolution and negligible smearing in an acceptably short time. The device, consisting of a drum (2) carrying a photo-sensitive offset printing plate medium (3) and an external, axially moving image projector (1), using a high-resolution, high-efficiency, reflective LC Spatial Light Modulator (SLM) as a micro-image source. The LC SLM is illuminated by a high-power, source of pulsed light (11) in the visible or near ultra-violet and the image is focused onto the photo-sensitive offset plate medium (3) by means of an optical projection system (13). On-the-fly adjustment may be made to the resolution of the final image. The source of pulsed light may be either a flash lamp or a continuous light source directed through a combination of two crossed, beam splitters (14, 16) and a polarization rotator (19). 98 % uniformity of illumination may be achieved by making use of the 64-level or more gray-scale capability of the SLM. Another version of the invention also utilizes auxiliary illumination material as that medium. All the components of the device are commercially available.
Abstract:
The present invention relates to an optical scanner (20) comprising a radiation source (24) for generating a radiation beam, and means (22, 26) for giving the radiation beam a scanning movement in a first direction through an angular range DELTA theta 1 and in a second direction through an angular range DELTA theta 2. The radiation source (24) is, for example, a diode laser and is tunable in wavelength, and the means comprise a rotating reflecting element and a grating.
Abstract:
An apparatus for recording an image onto a light recording medium (16) includes a light source (120) which emits light at a position which is movable over a light emitting area (21) of the light source controlled by a controller (13). A light position sensor (142) has a target area optically coupled to light emitted from a plurality of positions within the light emitting area of the light source used for recording for detecting the position of the light intersecting the target area of the sensor from the light emitting area of the light source and generating a signal dependent upon the light intersecting the target area. A controller (13), responsive to the signal, produces a correction parameter and controls the position of the light on the light emitting area of the light source with the correction parameter during recording. The present invention also reduces the effects of recording errors which occur near section boundaries as the sections are recorded onto a recording medium.
Abstract:
The mensuration frame grabbing apparatus (10) is comprised of a translation mounting structure (50, 100) in which a solid state camera (140) can be moved in orthogonal X, Y and Z directions in relation to a reseau assembly (150). The reseau assembly (150) includes a reseau plate that contains a plurality of grid mark grooves (162), preferably in the shape of crosses, which are utilized to mark and coordinate spatial locations of the image on the object (not shown).
Abstract:
PURPOSE: A lens shadow distortion compensating method and a device thereof are provided to reduce the capacity of required memory by switching orthogonal coordinates to polar coordinates and applying a section linear model. CONSTITUTION: A lens shadow distortion compensating device receives coordinates of a pixel in a pixel array and calculates a middle value(S100,S120). The device determines a section including the middle value and applies the middle value to a linear approximation(S140,S160). The device reads a correction gain value corresponding to a calculated distance from a correction gain value LUT(LookUp Table) and compensates an input signal outputted from the pixel as the correction gain value(S180,S200). [Reference numerals] (S100) Receive the coordinate(x,y) of a pixel; (S120) Calculate a middle value; (S140) Determine a section(n) containing the middle value(S); (S160) Calculate a distance(r) by applying the middle value(S) to a linear approximation; (S180) Read a correction gain value corresponding to the distance(r) from LUT; (S200) Compensate an input signal outputted form the pixel with the correction gain value; (S220) Output the compensated input signal as an output signal