基于灰度与彩色图像处理的木破率测量法

Wood Failure Percentage Measurement Method Based on Grayscale and Color Image Processing

提出了基于灰度、彩色图像处理的正交胶合木木破率数字快速测量方法,并且通过对以落叶松和碳化竹为基材、酚醛树脂和异氰酸酯为胶黏剂的试样进行干湿剪切条件下的破坏试验,验证了该方法的可行性.结果表明:基于灰度与彩色图像处理法计算出的木破率均与试验值符合较好,满足了工程应用的要求;木材破坏层次和木破率图像颜色的变化对测量精度的影响较大,胶黏剂固有色的变化对阈值分割的木破率灰度图像测量法的精度影响较大,环境影响则是像素统计的木破率彩色图像测量法的主要影响因素.

A fast digital measurement method of cross-laminated timber wood failure percentage based on grayscale and color image processing was proposed.To verify the feasibility of this method,the shear failure samples prepared with larch and carbonized bamboo as the base material and phenolic resin and isocyanic acid as the adhesives were tested under dry and wet shear conditions.The results show that the wood failure percentage calculated by the gray-scale and color image processing methods are in good agreement with the experimental values,and the errors meet the requirements of engineering applications.However,the color change of the wood damage level and the wood failure percentage image have a greater impact on the measurement accuracy.Among them,the change of the inherent color of the adhesive has a greater impact on the accuracy of the threshold segmentation gray-scale wood failure percentage image measurement method,while the environmental impact is the main factor of the color wood failure percentage measurement method of pixel statistics.