| 数字水准仪解码方法初探 |
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| 引用本文： | 王海涛,何平安,杨俊志. 数字水准仪解码方法初探[J]. 光电子技术, 2005, 25(1): 35-38,43 |
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| 作者姓名： | 王海涛 何平安 杨俊志 |
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| 作者单位： | 武汉大学电子信息学院,武汉,430079;中国测绘科学研究院,北京,100039 |
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| 摘 要： | 提出了一种新的数字水准仪编码的解码方法：利用条码的等距(即条码的长度都为20mm)来测视距，利用条码标识符顺序的伪随机性来测高程。先采用图像相关法，获得伪随机条码的粗测值，再依据几何法确定该条码的精测值。该方法充分利用灰度图像的边缘信息，通过投影处理，把条码的2-D信息转化为1-D从而获得亚像素级的测量精度，同时考虑了条码的倾斜和遮挡。
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| 关 键 词： | 数字水准仪 编码和解码 边缘检测 条码识别 水平投影 |
| 文章编号： | 1005-488X(2005)01-0035-04 |
A New Decoding Method for Digital Level |
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| WANG Hai-tao,HE Ping-an,YANG Jun-zhi. A New Decoding Method for Digital Level[J]. Optoelectronic Technology, 2005, 25(1): 35-38,43 |
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| Authors: | WANG Hai-tao HE Ping-an YANG Jun-zhi |
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| Affiliation: | WANG Hai-tao 1,HE Ping-an 1,YANG Jun-zhi 2 |
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| Abstract: | A new decoding method for digital level has been proposed, in which the values of the sight distance and height can be exacted through image correlation of the sequent identifier with pseudo-randomness and geometric construction of the length-setting barcodes. The algorithm of two-dimension barcode segmentation and recognition makes good use of the edge of the barcode, and the subsequently horizontal projection gets the subpixel detection. The tilt and shielding of the barcode have been taken into account at the same time. |
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| Keywords: | digital level coding and demodulation edge detection barcodes recognition horizontal projection |
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