Fig. 5From: Analyzing protein concentration from intact wheat caryopsis using hyperspectral reflectanceExtraction and distributions for the important spectral wavelengths of grain protein based on SPA method. A is grain, B is powder. The shaded part represents the main distribution areas of characteristic bands of grain protein obtained by SPA under different soil spectral pretreatments. The solid line represents the spectral reflectance of all grain and powder samplesBack to article page