Research On Embedded Technology For Identifying Two Dimensional Trace Code Of Citrus Fruits

Citrus fruits are popular for they contain a variety of nutrition and unique physiologicalactive substances, but pseudo-events commonly happened in the market, in order to ensurethe rights of the consumers and growers, it’s necessary to establish a complete set fruit qualityfull safety traceability system, and also introduce identity mechanism. Two dimensionalbarcode has the advantages such as high information capacity, high information density,strong privacy, and the identification of contains information don’t depend on the databaseand the network, being it as a traceability system information carrier has become the trend.This paper chooses Data Matrix two dimensional barcode Data as the research object, theWinCE embedded platform to realize its identification.The paper first discusses the standards of the traceability system; the whole system isdivided into seven parts, producing area information, production, post-harvest processing,storage, transportation, sale and inspection. For each part put forward the needs trace content,then introduce the content in detail how to encode and generate corresponding twodimensional barcode.Secondly, giving a comparative analysis how to select the hardware platforms andsoftware systems in decoding systems, choose the ARM11development board with theS3C6410core chip as the hardware development platform, Windows CE6.0as embeddedoperating system.The two dimensional barcode acquisition, image processing and recognition werestudied and discussed, using Microsoft Company provide DirectX development kit, cameradrive was developed by using embedded DirectShow technology based in WinCE platform,realize the barcode image real-time acquisition. The image processing method was studied,proposed using color image G component luminance as the whole image gray value;according to the noise type by collecting images, a median filter was used to the imagefiltering; Using the full threshold segmentation to realize image binarization, Also discussedin the complex background of the two dimensional barcode positioning detection method,first of all to do image edge detection, and the image pixels in horizontal and verticaldirection projection, according to the projection can detect the position of the bar code in thewhole image and split it out, using Hough transformation detection straight line in image andcompute image deflection angle, then rotate the image; at the last, using bilinear interpolationmethod to do image geometric correction.Finally, the paper introduced the Data Matrix two dimensional barcode decoding algorithm, and realized the identification of citrus fruit two dimensional trace code inembedded systems...