摘要:
A hand-supportable digital imaging-based bar code symbol reading system comprises: an automatic object presence detection subsystem; an image formation and detection subsystem having an area-type image sensing array with a field of view (FOV); a LED-based illumination subsystem having an LED illumination array for producing a field of narrow-band illumination within the FOV; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; an image-processing bar code symbol reading subsystem; an input/output subsystem; and a system control subsystem for controlling the subsystems. The image-processing bar code symbol reading subsystem has a mode of image processing, wherein a captured digital image is automatically processed along a set of parallel virtual scan lines spaced-apart by a number of pixel-offset distances proportional to the maximum pixel height of the region of interest (ROI) in the captured digital image containing a bar code symbol.
摘要:
A hand-supportable semi-automatic digital imaging-based bar code symbol reading system comprises: an automatic object presence detection subsystem; a multi-mode image formation and detection subsystem having narrow-area and wide area image capture modes of operation; a multi-mode LED-based illumination subsystem having narrow-area and wide area illumination modes of operation; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; a multi-mode image-processing bar code symbol reading subsystem; an input/output subsystem; a manually-actuatable trigger switch; and a system control subsystem for controlling the subsystems. The digital imaging-based bar code reading system employs a three-tier modular software architecture for carrying out its image-processing based bar code symbol reading operations. The three-tier software architecture comprises an application layer, a system core layer, and an operating system (OS) layer.
摘要:
A hand-supportable digital imaging-based bar code symbol reader comprises: an automatic object presence detection subsystem; an image formation and detection subsystem employing a CMOS area-type image detection array; an LED-based illumination subsystem employing an LED illumination array to generate a field of narrow-band LED-based illumination within the FOV; an automatic light exposure measurement and illumination control subsystem employing LED illumination driver circuitry; an image capturing and buffering subsystem; an image-processing bar code symbol reading subsystem; an input/output subsystem; and a system control subsystem for controlling the subsystems. The automatic light exposure measurement and illumination control subsystem controls the LED illumination driver circuitry to expose the automatically detected object, to a field of narrow-band LED-based illumination only when substantially all rows of pixels in the CMOS image sensing array are in a state of integration, thereby enabling the image capturing and buffering subsystem to capture high quality digital images independent of the relative motion between the bar code symbol reader and the object.
摘要:
A hand-supportable digital imaging-based bar code symbol reader employing an event-driven system control subsystem, automatic IR-based object detection, and a trigger-switch activated image capture and processing subsystem.
摘要:
A hand-supportable digital imaging-based bar code symbol reading system comprises: an automatic object presence and range detection subsystem; an image formation and detection subsystem; a multi-mode LED-based illumination subsystem having an LED illumination array; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; a multi-mode image-processing bar code symbol reading subsystem having a first mode and a second mode of operation; an input/output subsystem; and a system control subsystem for controlling the subsystems. The multi-mode image-processing bar code symbol reading subsystem automatically switches its modes of image-processing during a single bar code symbol reading cycle, and within each mode of image-processing based bar code symbol reading a different image-processing based bar code symbol reading methodology is automatically applied.
摘要:
A hand-supportable digital imaging-based bar code symbol reader comprises: an automatic object presence detection subsystem; an image formation and detection subsystem; a LED-based illumination subsystem having a wide area illumination mode of operation; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; an image-processing bar code symbol reading subsystem; an input/output subsystem; and a system control subsystem for controlling each of the above-described subsystems. The image-processing bar code symbol reading subsystem performs helically-sweeping feature-extraction analysis on a captured digital image of an object referenced from the center thereof, so as to enable the rapid reading of a bar code symbol graphically represented therein, using advanced image-processing based bar code reading techniques.
摘要:
A digital imaging-based bar code symbol reading system which comprises: an automatic object presence and range detection subsystem; an image formation and detection subsystem having an area-type image sensing array with a field of view (FOV); a multi-mode LED-based illumination subsystem having LED illumination arrays for producing fields of narrow-band illumination in near and far portions of the FOV; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; an image-processing bar code symbol reading subsystem; an input/output subsystem; and a system control subsystem for controlling the subsystems. The LED illumination arrays are automatically driven by the automatic light exposure measurement and illumination control subsystem in response to the generation of control activation signals by the automatic object presence and range detection subsystem.
摘要:
A method of reading bar code symbols using a digital-imaging based code symbol reading system employing an event-driven multi-tier modular software architecture and supporting automatic operating system login and loading of a bar code symbol reading application.
摘要:
A hand-supportable digital imaging-based bar code symbol reading device comprises: an IR-based object presence and range detection subsystem; a area-type image formation and detection subsystem having an image capture modes of operation; a multi-mode led-based illumination subsystem for providing a narrow-band field of illumination; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; a image-processing bar code symbol reading subsystem; an input/output subsystem; and a system control subsystem integrated with each of the above-described subsystems. The automatic light exposure measurement and illumination control subsystem has a light collecting element and a photodiode arranged within the hand-supportable housing, wherein incident illumination is collected from the predetermined portion of the FOV using the light collecting element, and then focused upon the photodiode for detection of the intensity of incident illumination and subsequent processing by the automatic light exposure measurement and illumination control subsystem.
摘要:
Digital-imaging based code symbol reading system employing an event-driven multi-tier modular software architecture and supporting automatic operating system login and loading of a bar code symbol reading application.