Method for improving accuracy in extraction of lake surface area by low-space-resolution remote sensing image

The invention discloses a method for improving accuracy in extraction of lake surface area by low-space-resolution remote sensing images. The method includes the steps: collecting multi-time-phase low-space-resolution remote sensing images of an area where a lake is located, and extracting lake surface area; collecting high-space-resolution remote sensing images similar to the low-space-resolution images in acquiring data as many as possible, and selecting a water body recognition method to extract lake surface area; analyzing lake surface area extracted by two same-time-phase remote sensing images, judging whether a relation between two lake surface areas needs to be segmented or not, if yes, calculating parameters according to area data in each segment, and if not, calculating parameters according to all area data; establishing a correction formula for segmentation according to the parameters acquired by calculation; for lake surface area extracted by low-space-resolution images of other time phases, judging the segment in which the lake surface area is positioned, and correcting the lake surface area according to the corresponding correction formula. By the method, accuracy in extraction of the lake surface area by the low-space-resolution remote sensing images can be improved effectively.