Tongue　imaging　and　analysis　devices　for　Traditional　Chinese　Medicine　have　increasingly　become　so　small　and　portable　that　they　can　be　used　to　collect　tongue　images　from　bedfast　patients.　This　provides　more　opportunities　for　traditional　tongue　diagnosis,　in　both　theoretical　and　practical　context.　In　the　study,　to　obtain　a　stable　and　high　quality　tongue　image,　authors　have　optimized　some　parameters　to　achieve　a　right　illuminating　environment　and　color　temperature.　Further　more,　to　maintain　the　needed　accuracy　and　reliability　for　tongue　manifestation　analysis,　a　right　color　correction　method　has　to　be　employed　to　reduce　color　distortions.　An　off-line　polynomial　regression　color　correction　method　is　used　to　enhance　the　color　precision.　©　2008　IEEE.