计算分割指标的代码matlab
时间: 2024-12-02 12:16:47 浏览: 1
在MATLAB中,计算图像分割指标通常涉及到评价分割结果的质量,比如像素精度(Precision)、召回率(Recall)或F1分数等。下面是一个简单的例子,展示如何计算像素精度、召回率和F1分数:
```matlab
% 假设我们有真实标签(ground truth)和预测标签(predicted labels)
true_labels = [1 0 1; 0 1 0; 1 0 1]; % 用二进制表示,1代表目标区域
predicted_labels = [1 0 0; 1 1 0; 1 0 1];
% 确定真正例(True Positive, TP),假正例(False Positive, FP),真负例(True Negative, TN),假负例(False Negative, FN)
TP = sum(true_labels .* predicted_labels);
FP = sum((true_labels == 0) & (predicted_labels == 1));
FN = sum((true_labels == 1) & (predicted_labels == 0));
TN = size(true_labels, 1) * size(true_labels, 2) - TP - FP - FN;
% 计算精度、召回率和F1分数
precision = TP / (TP + FP);
recall = TP / (TP + FN);
f1_score = 2 * precision * recall / (precision + recall);
disp("Precision: " + precision)
disp("Recall: " + recall)
disp("F1 Score: " + f1_score)
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