A method for encoding a symbol such as a barcode with a finder of a known pattern, comprises steps of determining a potential point on the finder edge and tracing and verifying a path representing the finder edge by checking the color of each point on the path against a threshold. The threshold is preferably reevaluated at least every several pixel movements along the path. The method may decode the barcode directly from the gray image displayed on a LCD screen without a need of a whole characte...

An optical or symbol reader including CMOS circuitry preferably integrated on a single chip. A CMOS optical reader chip comprises a CMOS imaging array having a plurality of pixels each with a dedicated pixel-site circuit. Charge is accumulated at each pixel location transferred upon demand to a common bus. In a preferred embodiment, exposure time of the imaging array is controlled using a feedback loop. One or more exposure control pixels are positioned adjacent to or within the imaging array an...

A barcode is scanned by a scanner having a laser emitting a pulsed laser beam which reflects off the barcode and is detected by a light detector. A receiver operatively joined to the light detector is tuned to the frequency of the pulsed laser beam for increasing signal gain.

A method and system for dynamically wedging data received from one or more automatic data collection ("ADC") devices on an ADC device platform into a destination application based upon wedging criteria. A dynamic wedge receives data from one or more ADC devices and automatically wedges the data into applications based upon user-provided data characteristics or a predetermined set of rules. Applicable wedging criteria used to route data include those that are user-composed and those that pertain ...

A computer system and a method used by the system are disclosed for processing data received by a network input device, such as a scanner or digital camera, that is available to multiple terminals or users. Profiles are created representing different preferences for data processing. Different profiles are associated with different identification codes. The identification codes are read, the data is received by the input device, and the data is then processed according to the preferences in the p...

A method of compensating the edge positions of a signal generated by scanning elements of a bar code, the method including the steps of lighting the code and determining the light diffused by the code to generate in response a signal having a substantially alternating waveform defined by a sequence of high-amplitude portions separated by and joined to low-amplitude portions by steeply sloping edges of the waveform. A number of local minimum and maximum points of the waveform are determined to de...

A method of estimating the mid-points of elements of a bar code, wherein the code is illuminated, and the light diffused by the code is picked up to generate in response a signal having a substantially alternating waveform profile defined by high-amplitude zones alternating with low-amplitude zones; each high-amplitude zone corresponding to a space of the code, and each low-amplitude zone corresponding to a bar of the code. The signal is then quantized to obtain a discretized waveform having a n...

The invention relates to a device for reading coded information, comprising illumination means, means for picking-up a luminous signal diffused by an illuminated support containing coded information, means for detecting the luminous signal intended to generate an electrical signal that is proportional to said luminous signal (for example, an electrical signal with an amplitude variable, along at least one reading direction, between at least one maximum value Vmax and at least one minimum value V...

A barcode reading apparatus including a barcode reader (10) for reading a barcode; a reading incorrectness discriminating section (20) for discriminating whether or not the result of the reading of the barcode by the barcode reading section (10) is likely to be incorrect and a re-read indicating section (30) for indicating, if the result of the reading of the barcode is discriminated likely to be incorrect by the reading incorrectness discriminating section (20), that it is necessary to re-read ...

A system for collaborative bar code error detection and correction comprises a network of individual scanning entities for scanning bar-coded labels. Each individual scanning entity includes a scanning system having a decoder for decoding scanned bar code information and a printhead defect identifier for identifying printhead defects from scanned bar code information that cannot be decoded and for constructing printhead defect models for use in correcting future bar code scans. A log is provided...