1) mean intensity ratio
近远场灰度比
1.
During the feature extraction, three models were employed,which include mean intensity ratio of the near field and the far field, the gray level co-occurrence matrices(GLCMs), and the gray level run-length (GLRL).
为了建立适合于脂肪肝B超图象识别的最佳特征矢量,首先提取正常肝和脂肪肝B超图像的近远场灰度比特征以及灰度共生矩阵、灰度游程长度两种纹理模型中的9个特征。
2) nearand farfield intensity
近、远场强度
3) perspective scale
远近比例
4) far-field approximation
远场近似
1.
Model of atmospheric backscatter on wind measurements using far-field approximation method;
基于远场近似法建立的大气风场测量散射模型
补充资料：视近怯远证
视近怯远证 视近怯远证 病名。系指能视近物而看不见远处物体的病证。见路际平《眼科临证笔记》。参见能近怯远证条。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条