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Implementation of Algorithm to Decode Two-Dimensional Barcode PDF-417

机译:二维条形码PDF-417的解码算法的实现

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摘要

In this paper we present a barcode reader to decode two-dimensional symbology PDF-417 and propose a novel method to extract the bar-space patterns directly from the gray-level barcode image, which employs the location and the distance between extreme points of each row of the barcode image. This algorithm proves to be very robust from the high convolution distortion environments such as defocussing and warping, even under badly illuminating condition. If the scanned barcode image is a result of the convolution of a Gaussian-shaped point spread function with a bi-level image, popular image segmentation methods such as image thresholding can not distinguish between very narrow bar-space patterns with a couple of pixels wide. The proposed algorithm shows improved performance over current barcode readers.
机译:在本文中,我们提出了一种条形码阅读器,用于解码二维符号PDF-417,并提出了一种直接从灰度条形码图像中提取条形码空间图案的新方法,该方法利用了每个条形码的极点之间的位置和距离条形码图像的行。即使在照明条件很差的情况下,该算法在高卷积失真环境(如散焦和翘曲)下也非常强大。如果扫描的条形码图像是高斯形状的点扩散函数与双层图像卷积的结果,则流行的图像分割方法(例如图像阈值处理)无法区分具有几个像素宽的非常窄的条形空间图案。提出的算法显示出比当前条形码读取器更高的性能。

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