color deconvolution fails when passing a stain matrix with only two stains

color deconvolution fails when passing a stain matrix with only two stains: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). For two stain images the third column is zero and will be complemented using cross-product. At least two of the three columns must be non-zero.