As the error suggests, its not possible to pass “metrics” option in “trainingOptions” for “YOLOv4ObjectDetector”. Instead I can suggest you to use “evaluateObjectDetection” function to obtain the metrics Precision, Recall and Accuracy. This function also provides the confusion matrix through which all metrics could be calculated.
detectionresults=detect(trainedDetector,imds)
%%%%%%%%%%%%%Calculate metrics
metrics = evaluateObjectDetection(detectionresults, blds)
%%To obtain confusion matrix
cm=metrics.ConfusionMatrix
%%To obtain Precision,recall and AP
recall = metrics.ClassMetrics{"vehicle","Recall"}
precision = metrics.ClassMetrics{"vehicle","Precision"}
ap = metrics.ClassMetrics{"vehicle","AP"}
For additional information and example about “evaluateObjectDetection” please refer to https://www.mathworks.com/help/vision/ref/evaluateobjectdetection.html
To avoid overfitting, you can try training with more data. That would help mitigate overfitting.
Hope you find this information helpful.
