Ortho Rectification of Resourcesat-2 Awifs Data using FFT Phase Correlation Technique

摘要

NDVI full India mosaic is generated from Resoucesat-2 AWiFS data for every 5 days at the resolution of 56 meters for crop inventory and drought assessment. Around 70-80 quadrant scenes are needed to be ortho rectified for the generation of one cycle full India mosaic file. The input geo-ortho kit products are having location accuracy of 2-3 pixels. So manual registration to bring into pixel level accuracy is required for temporal consistency between all products. Here, FFT based phase correlation matching algorithm is attempted to register the images in automatic fashion to sub pixel level. The results are discussed in detail.