摘要:
Operating a bi-optic imaging scanner (300) to image a target bar code (308). The scanner (300) including a plurality of camera assemblies (C1-C6). An image processing system (330) including a preprocessor (332) simultaneously receiving captured image data (350) corresponding to image frames (IF1-IF6) of each of the plurality of camera assemblies (C1-C6) and storing the captured image data in a preprocessor memory (334). The preprocessor (332) generating statistical information (SI) regarding the captured image data (350) stored in the preprocessor memory (334) to facilitate identification of regions of the image frames (IF1-IF6) wherein an image (308′) of the target bar code (308) may be present. The preprocessor (332) transferring selected captured image data (350) corresponding to identified regions of the image frames to a main system memory (338). A main processor (336) operates on selected captured image data (350) to decode the target bar code (308).
摘要:
An imager (12) is provided for imaging target objects (26) comprising an illumination source (22) for providing illumination (24) that is reflected (30) from a target object (26), an intensity of the illumination being a function of a magnitude of current provided to the illumination source (22) and photosensitive circuitry (36) located within the imager (12) for capturing an image reflected from the target object (26) to the imager (12) while the imager is activated during an exposure period. The imager (12) further comprises a selectively adjustable imaging mode (120) for selecting either of: the magnitude of current (130) provided to the illumination source (22) or exposure period (230) of the imager such that the other of the magnitude of current or exposure period of the imager is automatically adjusted (150, 240) as a result of the selection.
摘要:
The disclosed bar code reader includes an auto-focusing component for rapidly producing in focus images. An imaging system makes use of an aiming pattern that impinges upon the coded indicia of a target. The imaging system includes a light monitoring pixel array and a focusing lens that is fixed with respect to the pixel array for transmitting an image of the target object onto the pixel array. The bar code reader also includes an illumination system comprising one or more light emitting diodes for illuminating a the target within a field of view defined by the optical system. A drive circuit coupled to the light emitting diodes of the illumination system including at least one energy storage capacitor for providing an electrical pulse that illuminates the target. A controller selectively energizes the light emitting diodes by discharging the at least one capacitor of the drive circuit.
摘要:
A plurality of solid-state imagers is mounted in a reader, such as a bioptical, dual window, point-of-transaction workstation, for capturing illumination light returning along different fields of view from indicia. A controller controllably activates the imagers over respective exposure time periods during which the indicia are illuminated to produce electrical signals indicative of the indicia being read, processes the electrical signals to read the indicia, and controls the exposure time periods to be nonconcurrent to prevent interference among the imagers.
摘要:
An imager in an imaging reader captures light from a target, generates image data from the captured light, and generates a pixel clock signal having a pixel clock frequency in synchronism with the image data. A controller is connected via an electrical conductor to the imager, and controls the imager to transfer the image data, receives the image data, and processes the image data. A circuit suppresses electromagnetic radiation generated by the conductor during the image data transfer, and includes a spread spectrum modulator for modulating the pixel clock signal to generate a variable spread spectrum signal having a spread spectrum frequency that periodically varies above and below the pixel clock frequency, and a buffer having a plurality of registers for receiving and temporarily storing the image data, and for varying as a function of the spread spectrum frequency how much of the image data is being temporarily stored.
摘要:
An electronic device includes an imaging sensor collecting an image and creating an imaging signal corresponding to the image, an integrated circuit receiving the imaging signal from the imaging sensor and modifying a transfer characteristic of the imaging signal and a connector receiving the imaging signal from the integrated circuit having the modified transfer characteristic.
摘要:
A system and method for performing a read operation including acquiring a series of frames of image data; processing a first frame of image data including an array of pixel data acquired while an aiming pattern was generated for determining a location L of at least one pixel of the array of pixel data that corresponds to the aiming pattern; and processing a second frame of image data acquired while the aiming pattern was not generated. The processing of the second frame of image data includes the steps of selecting at least one optical code acquired in the second frame of image data that is located at a respective location; wherein the respective location meets a predetermined condition relative to the determined location L; and providing the selected at least one optical code for further processing in accordance with the read operation.
摘要:
A system and method for processing scanner signals by storing both a standard digitizer signal and a more detailed digitizer signal for decoding. The decoder can then use the standard digitizer signal by default and in those cases when the bar code pattern cannot be decoded using the standard digitizer signal the decoder may access the more detailed digitizer signal.
摘要:
An imaging assembly in an imaging reader for electro-optically reading indicia includes a solid-state imager having an array of image sensors, and a focus control element, such as a liquid imaging lens, having a variable transfer function characteristics for capturing, optically modifying and directing return light from the indicia over a field of view onto the imager for processing into an electrical signal indicative of the indicia during a reading mode of operation; and a controller for controlling the imaging assembly to optically modify the return light in accordance with a known transfer function stored in a memory accessible to the controller during a calibration mode of operation prior to the reading mode.
摘要:
An imaging assembly in an imaging reader for electro-optically reading indicia includes a solid-state imager having an array of image sensors, and a focus control element, such as a liquid imaging lens, having a variable transfer function characteristics for capturing, optically modifying and directing return light from the indicia over a field of view onto the imager for processing into an electrical signal indicative of the indicia during a reading mode of operation; and a controller for controlling the imaging assembly to optically modify the return light in accordance with a known transfer function stored in a memory accessible to the controller during a calibration mode of operation prior to the reading mode.