A Marine Object Detection Algorithm Based on SSD and Feature Enhancement

Figure 7

Comparison of loss functions of multidirection detections. (a) Loss function comparison of Laplace operator unidirectional. (b) Loss function comparison of Prewitt operator 2 directions. (c) Loss function comparison of Prewitt operator 4 directions. (d) Loss function comparison of Prewitt operator 8 directions. (e) Loss function comparison of Prewitt operator 16 directions. (f) Loss function comparison of Sobel operator 2 directions.

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