189results about How to "Improve decoding success rate" patented technology

The invention provides a bar code decoding chip of Data Matrix codes. A decoding method of the decoding chip comprises the following steps of: searching a position detection graph in a bar code image by a characteristic searching unit to determine pixel coordinates of the position detection graph; acquiring bar code parameters by a bar code parameter acquisition unit according to the pixel coordinates of the position detection graph to determine a bar code area and a bar code direction; searching a correction graph on the bar code image by a correction characteristic acquisition unit to acquire the pixel coordinates of the correction graph; calculating a gray value corresponding to a Data Matrix code module by a module information processing unit according to the pixel coordinates of the correction graph; carrying out binaryzation processing on the Data Matrix code module by a binaryzation unit; extracting code words by a code word extraction unit according to the Data Matrix code module subjected to the binaryzation processing; and carrying out error correcting and decoding processing on the code words by an error correcting and decoding unit according to an error correcting grade. The invention also provides the decoding method of the Data Matrix codes. The bar code decoding chip of the Data Matrix codes and the Data Matrix code decoding method can guarantee the decoding process of the Data Matrix codes to be quickly and smoothly carried out.

The invention provides a one-dimensional barcode decoding chip which comprises a scanning module, a border identification module, a direction identification module, a bar empty border processing module, a symbol parameter identification module, a symbol and character acquisition module and a decoding module; the scanning module produces scanning coordinates; the border identification module reaches barcode images according to the scanning coordinates and calculates the read image pixels so as to acquire the bar empty border points of the barcode images; the direction identification module calculates and obtains barcode directions according to the bar empty border points acquired by the border identification module; the bar empty border processing module processes the barcode images according to the barcode directions, so as to acquire the bar empty borders in the barcode images; the symbol parameter identification module calculates and acquires symbols and characters according to the bar empty and symbol parameters; and the decoding module converts the symbols and the characters into barcode information. The one-dimensional barcode decoding chip adopts a hardware assembly line structure, is applicable to the assembly line operation and parallel processing of the barcode images, and has high processing speed.

The invention provides a module for calculating bar space boundary pixel points. The module comprises a scanning boundary acquiring unit and a linear scanning unit, wherein the scanning boundary acquiring unit is used for acquiring bar space boundary points and a bar code direction and calculating a scanning boundary; and the linear scanning unit is used for selecting a scanning start point and a scanning final point corresponding to the scanning start point according to the scanning boundary and calculating coordinates of pixel points on a straight line between the scanning start point and the scanning final point. The method also provides a method for calculating the bar space boundary pixel points. The module for calculating the bar space boundary pixel points can adjust a decoding direction according to the bar code direction, acquire an accurate coordinate value of a bar code boundary and enhance a decoding success ratio.