nii更改像素值

首先安装nifti(matlab下)

然后运行：

clear
niiData = niftiread('output.nii');
pixelValues = niiData(:);
maxValue = max(pixelValues);
idx = niiData == 255;
niiData(idx) = 1;
pixelValues = niiData(:);
maxValue = max(pixelValues);
% 形成nii格式的数据
nii = make_nii(niiData); 
save_nii(nii,'modified_image.nii');