图像分割评价指标 matlab代码
时间: 2023-11-25 20:37:27 浏览: 198
以下是一些常用的图像分割评价指标的 MATLAB 代码示例:
1. Jaccard指数(也称为IoU或Dice系数):
```matlab
function jaccard = computeJaccard(groundTruth, segmented)
intersection = sum(groundTruth(:) & segmented(:));
union = sum(groundTruth(:) | segmented(:));
jaccard = intersection / union;
end
```
2. 完整性和准确性:
```matlab
function [completeness, correctness] = computeCompletenessAndCorrectness(groundTruth, segmented)
truePositives = sum(groundTruth(:) & segmented(:));
falsePositives = sum(~groundTruth(:) & segmented(:));
falseNegatives = sum(groundTruth(:) & ~segmented(:));
completeness = truePositives / (truePositives + falseNegatives);
correctness = truePositives / (truePositives + falsePositives);
end
```
3. Rand指数:
```matlab
function randIndex = computeRandIndex(groundTruth, segmented)
truePositives = sum(groundTruth(:) & segmented(:));
trueNegatives = sum(~groundTruth(:) & ~segmented(:));
falsePositives = sum(~groundTruth(:) & segmented(:));
falseNegatives = sum(groundTruth(:) & ~segmented(:));
randIndex = (truePositives + trueNegatives) / (truePositives + trueNegatives + falsePositives + falseNegatives);
end
```
这些代码示例可以用于计算图像分割评价指标,你可以根据需要进行调整和扩展。
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