基于结构光的凸凹字符采集与提取

Acquisition and Extraction for Protuberant Character Based on Structured Light

针对凸凹字符对比度低边缘特征不稳定,光照不均匀及污损会影响凸凹字符的正确提取,提出了基于结构光的采集与提取方法。首先使用结构光对包含有凸凹字符的物体表面照射,凸凹字符会使结构光变形,相当于凸凹字符对结构光进行了相位调制。软件处理算法以傅立叶变换为核心,从获取的图像中获取载波,并对原图像进行滤波和解调运算提取出凸凹字符。实验结果表明,基于结构光的凸凹字符采集与提取方法算法简洁效率高,算法具有整体性,不易受噪声干扰,有较可靠性和可应用性。

Protuberant character is the low contrast feature and irregular edge .The uneven illumination distribution and stained would affect protuberant character detection in images correctly .A novel method based on structured light for protu-berant character acquisition and extraction is proposed .At first , the surface include protuberant character is rayed with structured light ,protuberant character would bend the structured light .It is that structured light is phase modulated by pro-tuberant character .The processing algorithm based on fourier transform ,picks up the carrier wave from the reflected image . The reflected image is demodulated and filtered to extract the protuberant characters .Experimental results show that the al-gorithm is conciseness and effective ,and has the integrity ,is not easy to be interfered by noise .The proposed method has re-liability and application .