matlab计算语义分割指标
时间: 2024-01-16 11:05:10 浏览: 107
在Matlab中,可以使用以下方法计算语义分割指标:
1. 计算像素准确率(Pixel Accuracy):
```matlab
% 读取预测结果和真实标签
prediction = imread('prediction.png');
groundTruth = imread('ground_truth.png');
% 将预测结果和真实标签转换为二值图像
prediction = imbinarize(prediction);
groundTruth = imbinarize(groundTruth);
% 计算像素准确率
pixelAccuracy = sum(prediction(:) == groundTruth(:)) / numel(groundTruth);
```
2. 计算均交并比(Mean Intersection over Union,MIoU):
```matlab
% 读取预测结果和真实标签
prediction = imread('prediction.png');
groundTruth = imread('ground_truth.png');
% 将预测结果和真实标签转换为二值图像
prediction = imbinarize(prediction);
groundTruth = imbinarize(groundTruth);
% 计算每个类别的交并比
intersection = prediction & groundTruth;union = prediction | groundTruth;
IoU = sum(intersection(:)) / sum(union(:));
% 计算均交并比
numClasses = max(groundTruth(:));
mIoU = sum(IoU) / numClasses;
```
请注意,上述代码中的`prediction.png`和`ground_truth.png`分别表示预测结果和真实标签的图像文件。你需要将其替换为你实际使用的图像文件。
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