Abstract: A method and apparatus for reading data collection symbols initially samples and preferably stores an image of light reflected from the symbol. An initial portion of the symbol in the stored image is located and multiple reading techniques are performed based on the stored symbol image and the located portion. Several output signals are produced from the multiple reading techniques, and one of the output signals is selected as a decoded signal that represents the data encoded in the symbol. The multiple reading techniques can be multiple reading methods performed substantially simultaneously with each other (on one or more processors), a single method performed multiple times and at multiple locations within the stored symbol image, or each reading method can be broken down into constituent modules, and like modules grouped into sets.

Abstract: A method and apparatus for reading a distorted image of data collection symbol within a reader image generated and stored by a two-dimensional symbology reader begins by first locating a starting point in the distorted symbol image within the stored reader image. The method identifies edge contours of some or all of the bars and spaces in the symbol. The method then identifies one or more points within each of the identified edges. Thereafter, the method defines one or more sampling paths or lines that extend through the symbol, and through the points such that each line is constructed in a "connect-the-dot" fashion. The bars and spaces can then be sampled based on one or more of the defined lines, and the information in the symbol decoded from the sampled bars and spaces.