Remote Sensing Image Information Extraction and Application Based on Improved Pixel Exchange Algorithm

High resolution images can better reflect the size, shape and structural characteristics of ground objects, but due to factors such as purchase cost and observation period, it is often difficult to meet the practical application needs. Sub-pixel mapping technology can effectively improve the resolution of the results, which solves the above problem to some extent. The relevant algorithms of sub-pixel mapping include mixed pixel decomposition, end pixel extraction, sub-pixel positioning and other sub fields. The most classical sub-pixel positioning methods often use spatial correlation to define the positioning criteria. In this paper, NDWI and OTSU segmentation are used to constrain sub-pixel decomposition to some extent, which improves the performance of PSA algorithm, so as to more accurately extract river shoreline information, improve the resolution of monitoring on shoreline erosion collapse and dynamic change in the bank collapse area, and enhance the applicability of satellite remote sensing in the bank collapse monitoring field.