Abstract:
A scanning pen (10) is used in combination with a transparent ruler (36) which guides the movement of the pen (10) over a line of text. An indicia bar (46 and 50) along the length of the ruler (36) independently establishes the time rate in which the pen (10) is manually moved independent of whether the pen (10) is advanced, stopped, or reversed to generate a pixel map. A dictionary (208) of different symbols is established for identification of scanned graphic patterns. The scanning pen (10) may be used either as a point-and-click bar code reader (222), a bar code scanner (224), mouse (218), handwritten data (220), or text data input device (216). Bar codes may be user-defined or standardized and may symbolize alphanumeric data or macro instructions. The scanning pen (10) uses a single linear detector array (52) which can either be used in either a stationary input mode, a linear scan mode, or a two-dimensional mode. In the two-dimensional mode, a timing grid (228) with horizontal (232) and diagonal timing bars (234) of distinguishable thicknesses is employed to track the manual movement of the scanning pen (10).
Abstract:
An image reading apparatus, an image reading method and a program are provided for favorably correcting color misalignment in a sub-scanning direction of a read signal read by a plurality of line sensors without increasing a circuit scale or processing time. To accomplish this, the image reading apparatus sets, as a reference signal, the read signal that is output from one of the plurality of line sensors, and detects a correlation between the reference signal and each of a plurality of read signals output from line sensors other than the one of the plurality of line sensors of a plurality of lines that are displaced in predetermined line units from a line from which the reference signal is read, and selects a read signal having a high correlation with the reference signal as a read signal from the line of the reference signal.
Abstract:
L'invention concerne un procédé de numérisation d'un document selon lequel le document (4) est entraîné en défilement devant un capteur (2) par un mécanisme d'entraînement (3) comprenant une pluralité d'organes (31-36) venant en contact avec le document (4) au cours du défilement, le capteur (2) étant apte à générer des données numériques à partir d'une image figurant sur le document (4), le procédé comprenant des étapes consistant à : - détecter une mise en contact ou une rupture de contact entre le document (4) et l'un des organes (32), - corriger les données numériques en appliquant aux données une fonction de correction de distorsions qui prend en compte une position du capteur (2) par rapport à l'image au moment de la détection.
Abstract:
For accurately calibrating an inline scanner (10) a printer such as an inkjet printer may print a pattern (21, 22, 31), 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:
Laser scanning apparatus, methods, and article of manufacture are described. In one embodiment, a laser scanning apparatus 100 includes a light source 102 configured to emit a light beam in a single direction, a scanning device 106 optically coupled with the light source and configured to scan the light beam along a photoconductor in a plurality of scan lines. The laser scanning apparatus also includes a start-of-scan detector assembly 112 configured to sample the light beam and initiate a start-of-scan operation of one of the scan lines of information to be written on the photoconductor 110, and wherein the sampled light beam is used to control a drive level of the light source.