Figure 5. Confusion Matrix and Representative Image of Misrecognition Patterns.

A, Confusion matrix of misrecognition pattern. Besides a total of 11 458 correct surgical instrument recognitions (eg, SI-1 was correctly recognized as SI-1 666 times), a total of 213 misrecognitions were observed in the validation set (eg, SI-4 was misrecognized as SI-1 14 times). B, Representative images of misrecognition patterns. The blue circle indicates the anvil shaft of the circular stapler in the left image and the drainage tube in the right image.