# Specifications #### WARNING This library is deprecated, use [**EasyMatrixCode2**](../index.html.md) instead.  In a single read operation, **EasyMatrixCode** locates, unscrambles, decodes, reads and grades the quality of grayscale 2D data matrix codes of any size, contrast, location and orientation (even viewed from the back on a transparent medium), providing they meet the following specifications: * Minimum cell (= module) size: 3x3 pixels * Maximum stretching ratio (ratio between cell width and height): 2 * Minimum quiet zone (blank zone around the matrix code) width: 3 pixels ## Data Matrix Code Definition * A data matrix code is a two-dimensional rectangular array of black and white cells which conveys a string of characters (digits, letters and special characters). * It is encoded to achieve maximum packing. * Each cell corresponds to a bit of information. * Additional redundant bits allow error correction for robust reading of degraded symbols. * A data matrix code is located using the **Finder pattern**: * The bottom and left edges of a Data Matrix code contain only black cells. * The top and right edges have alternating cells.  * A data matrix code is characterized by: * Its [EMatrixCode::GetLogicalSize()](../../../../doxygen_cpp/classeVision_1_1EMatrixCode.html#aef484e264d742635af895e6182326fbb) [_.NET](../../../../doxygen_cs/classeVision_1_1EMatrixCode.html#aa88802f3ffa675b9aec6ad7fa31786a1) [_Python](../../../../doxygen_python/classeVision_1_1EMatrixCode.html#a7bf9494688602285fbb15cd19a3ec1bd) (number of cells). * Its **encoding type**: ECC 000 (odd symbol sizes, deprecated) or ECC 200 (even symbol sizes). #### NOTE The data matrix code definition is provided by ISO/IEC and approved as standard ISO/IEC 16022.