Multi-temporal cloud-free satellite image reconstruction method

• Main Authors: TIAN CHEN, MIAO HAOYU, ZHOU GUANHUA, TAN YUMIN, JING GUIFEI
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS

The invention relates to a multi-temporal cloud-free satellite image reconstruction method, which comprises the following steps of: dividing all remote sensing images in a short time of a target region into target images and candidate images according to application requirements and cloud coverage rate, correcting absolute geographic coordinates of all the images, and performing sorting according to the distance between imaging time and target time; carrying out cloud layer extraction by using a conservative cloud layer detection method combining a threshold value method, a correlation coefficient and minimum distance classification, and removing clouded pixels; counting gray level histograms of the images with different wave bands after the cloud layer pixels are removed at different times, and matching the histograms of the candidate images to the target date image; and according to the absolute geographic coordinates of the pixels, sequentially filling the missing pixels in the target region from near to f