摘要:
A barcode reader comprising a targeting illumination system, a plurality of illumination systems, and a lens assembly may also comprise feature offset data. The feature offset data may be offsets between locations of a plurality of features projected by the targeting illumination system within a plurality of calibration image frames captured at different calibration distances. The barcode reader may (i) select two features projected by the targeting illumination system that are present in a barcode image captured via the first lens, (ii) determine a feature offset that indicates an offset between the two features, and (iii) estimate a barcode distance based on the feature offset and the feature offset data.
摘要:
One aspect of the present disclosure is related to a barcode reader that includes a bright field illumination system, a dark field illumination system, and an additional illumination system that is better able to illuminate an area of the reader's field of view between the far zone (where bright field illumination is optimal) and the close zone (where dark field illumination is optimal). In this “center zone,” the dark field illumination may not be bright enough and the bright field illumination may not be diffuse enough for reading a barcode.
摘要:
This patent specification describes a barcode-reading system for a mobile device. The mobile device include an image sensor array for generating a color image of a target area. The color image includes sub-images each captured with a portion of the image sensor array sensitive to different bands of illumination. The barcode reading system may include an optic system configured to produce a targeting illumination pattern of a particular band of illumination passed by an optical filter within the target area. An image processing function of a barcode-reading application may create a grayscale composite image of a barcode by combining the sub-images. In combining the sub-images, a contribution from a sub-image captured by a portion of the image sensor array most sensitive to the particular band for the targeting illumination may be smaller than a contribution from the other two sub-images captured by other portions of the image sensor array.
摘要:
A method for glare reduction may be implemented by a graphical code reader. The graphical code reader includes an optic system, a plurality of light sources, and a control system. The control system is configured to determine that glare is present in an image captured by the optic system by identifying reflection from at least one of the plurality of light sources. The control system may take a corrective action to reduce the glare in subsequent images. The control system may be configured to take a first corrective action if a diffraction pattern is present at a periphery of the glare, and take a second corrective action if a diffraction pattern is not present at the periphery of the glare.
摘要:
A barcode reader may perform image processing functions to generate distinct image data records from the frame of image data of a barcode, select an image data record from the distinct image data records and decode the selected image data record. Each image data record may be generated by applying a distinct image processing function to the frame of image data. The barcode reader may capture multiple frames of image data in sequence based on image capture parameters. At least one of the multiple frames of image data may be captured with a distinct parameter value. The image capture parameters may include an exposure setting, a gain setting, a resolution setting, and/or an illumination setting.
摘要:
A barcode reader may perform image processing functions to generate distinct image data records from the frame of image data of a barcode, select an image data record from the distinct image data records and decode the selected image data record. Each image data record may be generated by applying a distinct image processing function to the frame of image data. The barcode reader may capture multiple frames of image data in sequence based on image capture parameters. At least one of the multiple frames of image data may be captured with a distinct parameter value. The image capture parameters may include an exposure setting, a gain setting, a resolution setting, and/or an illumination setting.
摘要:
The present disclosure provides a barcode reader including a second set of imaging optics having a larger effective depth of field than a first set of imaging optics and requiring a larger amount of time to process a resulting image of a barcode into a decodable format. The barcode reader also includes a processor providing a decoded output based on an image acquired with the second set of imaging optics if an image acquired with the first set of imaging optics is not decodable.
摘要:
A barcode reader may perform image processing functions to generate distinct image data records from the frame of image data of a barcode, select an image data record from the distinct image data records and decode the selected image data record. Each image data record may be generated by applying a distinct image processing function to the frame of image data. The barcode reader may capture multiple frames of image data in sequence based on image capture parameters. At least one of the multiple frames of image data may be captured with a distinct parameter value. The image capture parameters may include an exposure setting, a gain setting, a resolution setting, and/or an illumination setting.
摘要:
A barcode reader may include one or more advancements in the manner in which its software and/or firmware are updated and/or installed. The barcode reader may have an image sensor that captures an image of a barcode, a communication interface, volatile memory, non-volatile memory, and a processor. The barcode reader may receive executable code, selected from multiple versions, from a configuration server remote from the barcode reader. The executable code may be loaded directly into the volatile memory, without first being loaded into the non-volatile memory. The executable code may be loaded at a location in the volatile memory that begins at a start address stored in the non-volatile memory or in a header of the executable code. The barcode reader may execute the executable code to commence operation of the barcode reader directly after the executable code has been loaded into the volatile memory.
摘要:
A barcode reader for decoding data from a barcode includes barcode reading hardware, including an image sensor which captures an image of a barcode within a field of view. The barcode reader also includes a processor. The processor executes embedded firmware to operate the barcode reading hardware. The processor also generates decoded data representative of data encoded in the barcode by executing supplemental operating instructions which the barcode reader obtains from a remote configuration server upon power up of the barcode reader. The supplemental operating instructions are distinct from the embedded firmware and include instructions which, when executed by the processor, enable the barcode reader to output the decoded data from the barcode within the field of view.