Lake water information extraction method based on TM image

The invention discloses a lake water information extraction method based on a TM image. The lake water information extraction method comprises the following steps: selecting a typical region, and acquiring a TM image of the lake water with different mineralization degrees and peripheral surface features; then utilizing the coupling characteristics of different surface features to electromagnetic waves, and establishing a spectrum wave according to the brightness value of the lake water and peripheral surface features in the TM image; according to the difference of the brightness values of different surface features, primarily proposing a lake water information extraction model, and performing the feasibility and accuracy defection of the model by applying the lake water information extraction model to different regions under the constraint condition that the accuracy is greater than 95 percent; and finally, on the premise that the extraction accuracy is greater than 95 percent, establishing the lake water inf