Fig. 1. Core detection process of harness terminal microscopic image based on improved EfficientDet model

Fig. 2. Examples of anchor box generation. (a) 8×8 feature map; (b) 4×4 feature map

Fig. 3. Examples of data augmentation for microscopic images of wire harness terminals. (a) Original photo; (b) flip horizontal; (c) flip vertical; (d) saturation enhancement; (e) hue enhancement; (f) intensity enhancement; (g) salt and pepper noise; (h) Gaussian noise

Fig. 4. Learning rate and loss curves

Fig. 5. Comparison of detection results of different models

Fig. 6. P-R curves and area under the curve. (a) K-means; (b) GHM; (c) K-means and GHM

Fig. 7. Detection results of wire core of micrograph of wire harness terminals. (a) Harness terminal with 37 wire cores; (b) detection result of 37 cores terminal; (c) harness terminal with 84 wire cores; (d) detection result of 84 cores terminal

Fig. 8. Comparison of counting results between the proposed algorithm and manual method