Abstract:
A fluid ejection and scanning assembly includes a drop ejection element that causes fluid to be ejected from an associated nozzle chamber when activated. A first photosensor is coupled to the ejection element and is configured to cause the ejection element to be activated when the photosensor is illuminated by a light source. A second photosensor captures image data based on light reflected from media.
Abstract:
A scan window assembly with an open boundary includes a hollow housing, a transparent platen, and a first positioning corner for positioning a document. The hollow housing contacts the transparent platen at first and second interfaces to seal an opening of the hollow housing. The first interface is formed by an internal surface of the hollow housing and a top surface of the transparent platen contacting the internal surface. The second interface is formed by an external surface of the hollow housing and a bottom surface of the transparent platen contacting the external surface. The second and first interfaces are positioned at different horizontal heights.
Abstract:
A desired area, a desired resolution of the desired area, and a desired reduction ratio of an area other than the desired area are specified. An image data of the desired area is extracted from an image data of a document read at the desired resolution. A changed image data is created by changing the image data of the document based on the desired reduction ratio. The image data of the desired area and the changed image data are subjected to multi-page filing and saved as one file.
Abstract:
An apparatus for optically projecting pixel-based image information onto a light-sensitive material has an image-generating device, an optical projection device, and a device for laterally offsetting the projected image of the image-generating device to produce a plurality of mutually offset partial images in the image plane. The offsetting device has two optical elements arranged in sequence in the light path of the projection. The projected partial images are offset relative to each other by tilting one or both of the optical elements.
Abstract:
Method and apparatus for scanning a target moving relatively to a scanner to obtain an image involves scanning at an oblique angle to the direction of motion and oversampling. The image is then created by rearranging the scanned pixels. Blur in the scan optics and other distortions are removed by a deconvolution process which is adapted for the oblique angle scanning.
Abstract:
The present invention relates to an image reading apparatus comprising a conveying means for conveying a sheet to a reading position; a platen glass guiding the sheet conveyed at the reading position; a reading apparatus for reading through the platen glass an image on the sheet conveyed at the reading position; a sheet guide member disposed on a side opposite to the reading device with respect to the platen glass for forming a small gap with the platen glass; and a driving means for moving the reading device. The drive device can move the reading device to a main reading position for reading operation at a position at which the sheet conveyed to the reading position is in contact with the platen glass and to at least one sub reading position for reading operation at a position at which the sheet conveyed to the reading position is not in contact with the platen glass.
Abstract:
A light attenuating filter is introduced between a light source and a light sensor in a calibration region of a transparency scanner. The transparency scanner includes a carriage for supporting the light source, a transparent platen, and a housing for supporting the transparent platen. The light attenuating filter is placed in the calibration region either as part of a template resting on the transparent platen, as part of housing, or as part of the carriage. Light from the light source is directed through the light attenuating filter and onto the light sensor. The transparency scanner is calibrated to compensate for the attenuation of light by the light attenuating filter. Calibrating the transparency scanner includes adjusting one or more parameters for controlling the transparency scanner. Examples of parameters used for controlling the transparency scanner include light source intensity, light source exposure time, and analog and digital gain of a signal produced by the light sensor. In order to achieve a color balance in the calibration, the light attenuating filter may attenuate light of one color more than light of another color. When the transparency scanner is calibrated using this filter, color balance of the transparency scanner is adjusted.
Abstract:
An additional motion is introduced into a scanning operation. This additional motion is in addition to the motion that is inherent in any document scanning operation. For example, in a flatbed scanner a linear array of scanning devices is positioned across the document in a first or nullxnull direction and this array is moved across the document in a perpendicular or nullynull direction. In a flatbed scanner the position of the scanning devices are fixed in the nullxnull direction. In a drum scanner a light beam moves across the document in an nullxnull direction and the document is moved in the nullynull direction. The light reflected from the document is directed to a fixed photoreceptor. With the present invention an additional vibratory motion is introduced into the scanning process. With a flatbed scanner the array of detector devices is moved or vibrated. The vibratory motion can for example be in the nullxnull direction. With a drum scanner the photoreceptor is moved or vibrated. For example the photodetector can be moved or vibrated in the nullxnull direction. The amount and direction of the vibratory movement can vary up to about one half the distance between units in the scanner's resolution (i.e. one half a pixel). If one is trying to eliminate Moire patterns the vibratory movement can be a pseudo random series of movements. If one is trying to introduce a special pattern into the document or to otherwise create special effects, various other type of motion can be used. Movement of the CCD array in a flatbed scanner or movement of the photoreceptor in a drum scanner can be done by a simple piezo electric transducer or by a simple mechanical cam.
Abstract:
An image scanning method includes pre-scanning a first document to generate a first original image according to the first document; adjusting parameter settings of the first original image to generate and store a plurality of pre-view images corresponding to different sets of parameters; pre-scanning a second document to generate a second original image according to the second document; and scanning the second document to generate a plurality of scanning images according to the different sets of parameters of the pre-view images. The parameter settings of the first original image include brightness, shadow, and contrast settings.
Abstract:
An imaging device for document imaging may comprise a housing and an optical system having a lens system and an optical detector. The optical system is responsive to image light reflected by an object and produces image data representative of the image light. The optical system is pivotally mounted to said housing and is biased toward a vertical orientation inside said housing by gravity.