mrcolour: png upside down #2179
Description
mrcolour produces pngs that are upside down. macOS, PNG library: Header: 1.6.37; library: 1.6.37
wget https://github.com/MRtrix3/script_test_data/raw/master/BIDS/sub-02/dwi/sub-02_dwi.nii.gz
mrconvert sub-02_dwi.nii.gz -coord 3 0 -coord 0 15 sag.mif
mrcolour sag.mif gray sag.png
mrconvert sub-02_dwi.nii.gz -coord 3 0 -coord 1 15 cor.mif
mrcolour cor.mif gray cor.png
