Barcode reader

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.

主权项

1. A barcode reader, comprising:
a lens for focusing an image of a barcode onto an image sensor array, wherein the image sensor array comprises a plurality of rows of pixels, and each pixel comprises an active photosensitive region which accumulates charge over a duration of an exposure period; a first circuitry configured to:
sequentially commence exposure for each row of pixels from a first row to a last row of the image sensor array, wherein each row of pixels is exposed for an exposure period commencing at an exposure start time for the row and ending at an exposure end time for the row;for each row of pixels, at the exposure end time, measure, and transfer to a first memory at a first read-out speed, digital values representative of intensity of illumination accumulated on each pixel within the row during the exposure period; andreceive image capture parameter values and capture multiple frames of image data in sequence based on the image capture parameter values, wherein at least one of the multiple frames of image data is captured with an image capture setting set to an image capture parameter value that is distinct from the image capture setting for at least one other frame of image data; a second circuitry configured to transfer the digital values from the first memory to a second memory at a second read-out speed, wherein the second row read-out speed is slower than the first row read-out speed; and a processor configured to decode the barcode represented by the digital values stored in the second memory.