結合圖像上下文的二階導數邊緣融合線條精確定位與配準
[Abstract]:The accurate location of line in line tool trace image is the key to realize the automatic checking and comparing of criminal tool trace. Because the edge detection method is easily affected by image noise to produce false edge, it can not accurately locate the actual line in the trace, which leads to the difficulty of line feature extraction. In this paper, a new method of line location based on second derivative edge fusion combined with image context is proposed. First of all, according to the current line tool trace manual comparison method, the image inspection line is defined, the second derivative of the image is calculated along the alignment line direction, and the derivative value is fused regularly according to the property of the edge of the second derivative. To calculate the ridge and valley areas in line traces; Then according to the experience of manual line trace alignment, the line area is optimized, and the pseudo-line in the deep valley is deleted. Finally, the precise location of the line is realized by combining the image context to calculate the salient points in the ridge region. On the basis of the accurate location of the on-line strip, the experimental samples are registered with the second derivative absolute maximum ridge line, the grayscale maximum ridge line, the deepest valley feature line, and the distance between the feature lines as the feature template (vector). It can achieve a higher registration rate for the marks formed by the tool with obvious features of the working site. The experimental results show that the line location and registration method proposed in this paper can quickly realize the accurate location and registration of the lines in the line tool trace image, which lays a foundation for the automatic alignment of the line tool trace.
【作者單位】: 廣東警官學院計算機科學與技術系;廣東警官學院刑事科學技術系;
【基金】:國家自然科學基金項目(61471134) 公安部應用創(chuàng)新項目(2015YYCXGDST026) 廣東警官學院創(chuàng)新團隊項目(2015JSTD03)
【分類號】:TP391.41
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