当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2013年
9期
1331-1333
,共3页
张文识%孙杰%张长军%程新求
張文識%孫傑%張長軍%程新求
장문식%손걸%장장군%정신구
管壁缺陷检测%图像分割%灰度中值%最小误差法
管壁缺陷檢測%圖像分割%灰度中值%最小誤差法
관벽결함검측%도상분할%회도중치%최소오차법
Wall defects detection%Image segmentation%Class median%Minimum error thresholding%Convergence analysis
针对压力钢管内壁表面缺陷图像在直方图呈偏态或重尾时图像分割效果差的问题,在传统的图像分割思想的基础上,提出了一种基于灰度中值和灰度平均离差分生成图像最佳分割阈值主变量的改进算法。实验结果表明,改进后的算法对于能够稳定有效地分割压力钢管内壁正常部位与缺陷部位,并将缺陷部位的细节特征增强显示,为后续分析缺陷原因提供了很好的形态学依据;显示了其在化工设备的完整性检测技术中的应用意义。
針對壓力鋼管內壁錶麵缺陷圖像在直方圖呈偏態或重尾時圖像分割效果差的問題,在傳統的圖像分割思想的基礎上,提齣瞭一種基于灰度中值和灰度平均離差分生成圖像最佳分割閾值主變量的改進算法。實驗結果錶明,改進後的算法對于能夠穩定有效地分割壓力鋼管內壁正常部位與缺陷部位,併將缺陷部位的細節特徵增彊顯示,為後續分析缺陷原因提供瞭很好的形態學依據;顯示瞭其在化工設備的完整性檢測技術中的應用意義。
침대압력강관내벽표면결함도상재직방도정편태혹중미시도상분할효과차적문제,재전통적도상분할사상적기출상,제출료일충기우회도중치화회도평균리차분생성도상최가분할역치주변량적개진산법。실험결과표명,개진후적산법대우능구은정유효지분할압력강관내벽정상부위여결함부위,병장결함부위적세절특정증강현시,위후속분석결함원인제공료흔호적형태학의거;현시료기재화공설비적완정성검측기술중적응용의의。
In allusion to the poor results of segmentation in steel defects detection when the histogram of images of defects was skew and heavy-tailed, an improved method for image segmentation based on class median was proposed according to the conventional segmentation algorithms:minimum error thresholding that employed the sample mean value, the convergence process of optimization was also discussed based on particle swarm optimization. The testing results indicate the modified method can highlight the details of defects’ morphology, which can provide sound grounds for cause analysis; meanwhile, the improved algorithm is applicable in the detection of the integrity of the chemical equipments.