To provide a plant discrimination apparatus capable of improving discrimination accuracy of plant species.SOLUTION: The plant discriminating apparatus separates visible light contained in reflected light by aquatic plants for each pixel in a predetermined region of a spectral image including a spectral spectrum in the visible light region and a spectral spectrum in the near infrared region for each pixel A reference value calculation unit (3) for calculating a minimum value and a median value of the light intensity in the first wavelength range in the area and a median value of the light intensity in the second wavelength range in the near infrared region included in the reflected light from the aquatic plants 11) for each pixel in the predetermined region of the spectral image in accordance with the minimum value and the median value in the first wavelength range and the median value in the second wavelength range from the discrimination target of the plant type And a deletion unit (12) for judging whether or not to exclude.(FIG.【課題】植物種の判別精度を向上できる植物判別装置を提供する。【解決手段】植物判別装置は、画素ごとに可視光域の分光スペクトルと、近赤外域の分光スペクトルとを含むスペクトル画像の所定領域内の画素ごとに、水生植物による反射光に含まれる可視光域内の第1の波長範囲における光強度の最小値及び中央値と、水生植物による反射光に含まれる近赤外域の第2の波長範囲における光強度の中央値とを算出する基準値算出部(11)と、スペクトル画像の所定領域内の画素ごとに、第1の波長範囲における最小値及び中央値と、第2の波長範囲における中央値とに応じて、その画素を植物種の判別対象から除外するか否か判定する削除部(12)とを有する。【選択図】図5
