DEMO CODE:
For most applications, the size of the 2D code to be read is known. Sometimes, for a variety of reasons the code gets damaged. As the structure of the Locator template and the matrix size information is pre-known, the 2D code can be reconstructed. The example presented here illustrates how this can be accomplished using LV and IMAQ Vision.
Figure 3 User interface (a) and Block Diagram (b) for a demo code illustrating use of the example VIs for Pre-processing of the Data Matrix codes
The inspection systems can be trained on the size of the barcode and the number of elements in it. When a damaged barcode comes into the system it is then read correctly. Figure 3(a) shows the damaged DataMatrix code is reconstructed with the missing information for the Locator and the alternating black and white cells. The resulting image is then passed through the DataMatrix reader VI and is read correctly.
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