图1 指针式仪表自动读数方法流程图

Fig. 1 Flowchart of automatic pointer meter reading method

图2 R-YOLOv7算法结构图

Fig. 2 R-YOLOv7 algorithm structure diagram

图3 长边定义法

Fig. 3 The method of definition of the long side

图4 环形平滑标签(CSL)表示法

Fig. 4 Circular smooth labeling (CSL) representation

图5 EMA结构图

Fig. 5 EMA structure diagram

图6 R-YOLOv7检测结果((a)表盘；(b)关键信息)

Fig. 6 R-YOLOv7 detection results ((a) Dial; (b) Key information)

图7 MIMO-CTFNet算法结构图

Fig. 7 MIMO-CTFNet algorithm structure diagram

图8 LGFEM模块结构图

Fig. 8 LGFEM module structure diagram

图9 LGFEM模块的子模块结构图((a) AU模块结构；(b) ARB模块结构；(c) MDTA模块结构；(d) GDFN模块结构)

Fig. 9 Submodule structure diagram of LGFEM module ((a) AU module structure; (b) ARB module structure; (c) MDTA module structure; (d) GDFN module structure)

图10 运动模糊仪表图像复原((a)运动模糊图像；(b)运动模糊图像修复结果)

Fig. 10 Motion blur instrument image restoration ((a) Motion blur image; (b) Motion blur image restoration results)

图11 表盘校正结果((a)校正前；(b)校正后)

Fig. 11 Dial correction results ((a) Before correction; (b) After correction)

图12 刻度值的空间聚合((a)数字和小数点检测结果；(b)数字框合并及刻度值计算结果)

Fig. 12 Spatial aggregation of scale values ((a) Numbers and decimal points detection results; (b) Results of combining number boxes and calculating scale values)

图13 刻度线中心和表盘圆心点坐标示意图

Fig. 13 Schematic diagram of the coordinates of the center of the scale and the center point of the dial circle

图14 刻度线增补或删除示意图((a)缺失或多出部分刻度线中心点示意图；(b)增补或删除刻度线中心点结果)

Fig. 14 Schematic diagram for adding or deleting scale lines ((a) Schematic diagram of the center point of the missing or extra part of the scale line; (b) Adding or deleting scale center point results)

图15 大刻度线赋值结果

Fig. 15 Large scale assignment results

图16 指针直线拟合((a)指针检测结果；(b)指针拟合结果)

Fig. 16 Pointer line fit ((a) Pointer detection results; (b) Pointer fitting results)

图17 基于小刻度线的角度法示意图

Fig. 17 Schematic diagram of the angle method based on small scale lines

图18 部分指针式仪表检测结果

Fig. 18 Partial pointer meter detection results

图19 各个算法图像复原效果对比((a)模糊图片；(b) MIMO-UNet；(c) MIMO-UNet+；(d) SFNet；(e)本文方法；(f)清晰图片)

Fig. 19 Comparison of image restoration results of various algorithms ((a) Blurry picture; (b) MIMO-UNet; (c) MIMO-UNet+; (d) SFNet; (e) Ours; (f) Clear picture)

图20 部分表盘关键信息检测效果

Fig. 20 Part of the dial key information detection effect

图21 理想环境及有干扰环境下部分指针式仪表自动读数识别过程

Fig. 21 The automatic reading recognition process of partial pointer instruments in both ideal and interference environments

图22 部分不同指针式仪表自动读数识别过程

Fig. 22 Automatic reading recognition process for some different pointer meters

图23 部分工业场景下指针式仪表自动读数识别过程

Fig. 23 Automatic reading recognition process for pointer meters in some industrial scenarios

图24 部分运动模糊指针式仪表自动读数识别过程

Fig. 24 Automatic reading recognition process for partial motion blurred pointer meters