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AssigneeWelch Allyn Data Collection, Inc.
InventorAndrew Longacre JR.
Estimating the term…
In the present invention, a bar code reader captures an initial image map corresponding to a scene, then subjects the initial image map to an interpolation step wherein values for constructed pixels positionally intermediate pixel values of the initial image map are interpolated as a function of the initial image map pixel values bordering the constructed pixels. After an interpolated image map is constructed, the interpolated image map is subjected to a binarization step wherein grey scale pixel values of the interpolated image map are converted into binary (1 or 0) pixel values by way of a thresholding process. In the thresholding process, grey scale pixel values are compared to a threshold in the grey scale range, then set to 1 if they are above the threshold and set to 0 if below the threshold. The pixel values of the resulting binarized interpolated image map are then analyzed to determine the identity of a message which may be encoded in any symbol which may be represented in the binarized interpolated image map.
A method of operating a bar code reader which captures frames of image data, said method comprising:
A method for operating a bar code reader which captures a frame of image data, said method comprising the steps of:
A method for operating a bar code reader having an area image sensor said method including the steps of:
A method for operating a bar code reader of the type having an area image sensor, said method comprising the steps of:
A method for operating an area image sensor bar code reader which captures an image map, said method comprising the steps of:
A method for operating a bar code reader which captures a grey scale image map, said method including the step of:
Dependencies are inferred from the claim text.