Intelligent ZHENG Classification of Hypertension Depending on ML-kNN and Information Fusion

Table 2

Information from tongue diagnosis.

Pale tongue	Red tongue	Dark red tongue	Pale red tongue	Crimson tongue	Teeth-marked tongue	Tender tongue
Tender and red tongue	Bluish purple tongue	Enlarged and pale tongue	Red margins and tip of the tongue	Petechial on tongue	Enlarged tongue	Dark tongue body
Sublingual collateral vessels tongue	Thin fur	Yellow fur	White slimy fur	Few fur	White fur	Thin yellow fur
Yellow slimy fur	No fur	Thin white fur	Slimy fur	Thick slimy fur	White slippery fur