Abstract:
A method and apparatus are provided for efficiently obtaining navigational position of a sensor array based on a correlation between images captured by the sensor array at successive points in time. This is achieved by first acquiring a reference frame through said sensor array, successively acquiring a sample frame through said sensor array. Correlation data representing a relationship between the sample frame and the reference frame is then generated and a displacement of a reference feature contained in both the reference frame and the sample frame is determined based on the correlation data. The correlation surface of the correlation data is modeled as a general two-dimensional Taylor series expansion. The method and apparatus of the present invention can be advantageously employed in a scanning device to provide efficient scheme for obtaining navigational information based on a comparison of image frames captured by a sensor array of the scanning device at successive points in time.
Abstract:
There is disclosed an image ssensor unit comprising: illumination unit for illuminating light on an original; an image sensor for reading out image information on the original by reflection light of said illuminated light; holding for holding the illumination unit; and a mounting unit for causing the holding unit to hold the illumination unit so that the relative displacement between the illumination unit and said holding unit in a direction along a surface of the holding unit on which the illumination unit is held by the holding unit.
Abstract:
An image reading apparatus comprising a photosensor for receiving light from a light source through an original document, a wiring section for driving the photosensor, a circuit for driving the photosensor and for processing an output signal from the photosensor. The apparatus includes a first substrate having the photosensor and the wiring section thereon, and a second substrate having the circuit thereon and being separated from the first substrate. The second substrate is fixed above the first substrate.
Abstract:
PROBLEM TO BE SOLVED: To compensate image data including an optical or spatial array error in a multi-chip array sensor.SOLUTION: A method of processing image data from a multi-chip array includes: generating by using a processor of a computer, a Δx optical error value 114 substantially equal to the difference in a transverse direction between an apparent location of a first photosensor affected by an optical error and an actual location of the first photosensor; storing respective outputs from photosensors in the array for a scan line, including the apparent location, into a memory element of the computer; retrieving the outputs respectively stored for the first photosensor and the second photosensor, which are included in the scan line; interpolating the outputs, respectively stored for the first photosensor and the second photosensor, in order to use the image data as image data capable of use for the first photosensor.
Abstract:
It is an object of the invention to correct a tilt of an image inputted in a tilted state for a sentence of an original without intervening the operation of the user. For this purpose, projections of two partial images are obtained at check points which were properly decided in the input image information. A tilt angle of an original is obtained from a correlation position of the projections of each partial area. By dividing the image into belt-shaped small areas and shifting in accordance with the tilt angle obtained, an image in which the tilt of the input tilted image was corrected is formed.
Abstract:
An image reading apparatus comprising a photosensor for receiving light from a light source through an original document, a wiring section for driving the photosensor, a circuit for driving the photosensor and for processing an output signal from the photosensor. The apparatus includes a first substrate having the photosensor and the wiring section thereon, and a second substrate having the circuit thereon and being separated from the first substrate. The second substrate is fixed above the first substrate.
Abstract:
A system for generating a warped contone image that compensates for beam scan trajectory distortions. The system includes an image buffer for storing a portion of a received contone image. An interpolation coefficient generator provides interpolation coefficients associated with a warped pixel within the warped contone image in response to an input identifying the warped pixel. A pixel interpolator is coupled to the image buffer and the interpolation coefficient generator and provides an output signal that identifies the warped pixel within the warped contone image. The pixel interpolator further retrieves pixels from the contone image stored in the image buffer using the interpolation coefficients and generates the warped pixel by combining the retrieved pixels into a single pixel value.
Abstract:
PROBLEM TO BE SOLVED: To solve such a problem that density unevenness may occur when the linearity of PWM to image density is hardly obtained in order to perform correction below one pixel and correction of one-pixel unit for an image half-toned using screen processing, for registration correction. SOLUTION: Interpolation is performed so that half dots are always formed with the same manner after the interpolation. By applying a matrix considering the orientation of dots that may be disturbed by the interpolation during the screening processing, conversion while maintaining the vertical relation in the arrangement of the half dots in the sub-scanning direction is performed for the correction below one dot. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
A system for correcting registration errors in a printer (Fig.1). The system includes a memory device (82,82 ) for storing sequential rasters of image data and an interpolator (60) coupled to the memory device, the interpolator using the rasters of image data from the memory device in conjunction with multiplication factors to calculate an interpolated resample value. The system also includes addressing circuitry (86,86 ) for providing address signals (99,111) to the memory device, the addressing circuitry also providing the multiplication factors (XFRACT, YFRACT) to the two dimensional interpolator. Finally, included is a correction device for providing adjustment values to the addressing circuitry, the adjustment values being used to correct for the registration errors.
Abstract:
There is disclosed a recording sheet for use in an image recording apparatus which forms an image by a recording head, the recording sheet has a pattern for measurement in which a correction amount for correction of a positional shift of a recorded dot recorded by the recording head is measurable based on a positional relationship with an image for measurement formed by the recording head, and accordingly it is possible to correct arrangement of recorded dots and to record an image without any distortion.